/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:17:47,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:17:47,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:17:47,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:17:47,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 14:17:47,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 14:17:47,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 14:17:47,390 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-Separate.epf [2022-01-18 14:17:47,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:17:47,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:17:47,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:17:47,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:17:47,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:17:47,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:17:47,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:17:47,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:17:47,405 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:17:47,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:17:47,405 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:17:47,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:17:47,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:17:47,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:17:47,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:17:47,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:17:47,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:17:47,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:17:47,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:17:47,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:17:47,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:17:47,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:17:47,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:17:47,408 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:17:47,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:17:47,408 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:17:47,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:17:47,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:17:47,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:17:47,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:17:47,615 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:17:47,618 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:17:47,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2022-01-18 14:17:47,619 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2022-01-18 14:17:47,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:17:47,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:17:47,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:17:47,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:17:47,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:17:47,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,657 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:17:47,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:17:47,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:17:47,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:17:47,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:17:47,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:17:47,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:17:47,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:17:47,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:17:47,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/1) ... [2022-01-18 14:17:47,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:17:47,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:47,708 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 14:17:47,727 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 14:17:47,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:17:47,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:17:47,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:17:47,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:17:47,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:17:47,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:17:47,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:17:47,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:17:47,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:17:47,737 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 14:17:47,769 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:17:47,770 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:17:47,851 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:17:47,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:17:47,856 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 14:17:47,857 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:17:47 BoogieIcfgContainer [2022-01-18 14:17:47,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:17:47,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:17:47,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:17:47,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:17:47,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:17:47" (1/2) ... [2022-01-18 14:17:47,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1404531d and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:17:47, skipping insertion in model container [2022-01-18 14:17:47,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:17:47" (2/2) ... [2022-01-18 14:17:47,866 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2022-01-18 14:17:47,870 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:17:47,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:17:47,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:17:47,870 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:17:47,910 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 14:17:47,955 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:17:47,962 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 14:17:47,962 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 14:17:47,972 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2022-01-18 14:17:47,996 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 14:17:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 14:17:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 14:17:48,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:48,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:48,005 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1644387332, now seen corresponding path program 1 times [2022-01-18 14:17:48,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745973182] [2022-01-18 14:17:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:48,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:48,165 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 14:17:48,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:48,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745973182] [2022-01-18 14:17:48,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745973182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:48,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:48,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:17:48,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717675059] [2022-01-18 14:17:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:48,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:17:48,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:48,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:17:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:17:48,206 INFO L87 Difference]: Start difference. First operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:48,243 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2022-01-18 14:17:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:17:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 14:17:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:48,254 INFO L225 Difference]: With dead ends: 99 [2022-01-18 14:17:48,254 INFO L226 Difference]: Without dead ends: 92 [2022-01-18 14:17:48,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:17:48,258 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:48,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-18 14:17:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-01-18 14:17:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 14:17:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2022-01-18 14:17:48,312 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2022-01-18 14:17:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:48,313 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2022-01-18 14:17:48,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2022-01-18 14:17:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:17:48,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:48,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:48,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:17:48,315 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:48,315 INFO L85 PathProgramCache]: Analyzing trace with hash 27040755, now seen corresponding path program 1 times [2022-01-18 14:17:48,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:48,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387201305] [2022-01-18 14:17:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:48,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:48,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:48,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387201305] [2022-01-18 14:17:48,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387201305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:48,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152638467] [2022-01-18 14:17:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:48,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:48,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:48,400 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 14:17:48,401 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 14:17:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:48,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:17:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:48,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:48,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152638467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:48,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:48,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-01-18 14:17:48,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909136079] [2022-01-18 14:17:48,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:48,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:48,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:48,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:48,548 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 14:17:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:48,621 INFO L93 Difference]: Finished difference Result 189 states and 379 transitions. [2022-01-18 14:17:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:17:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 14:17:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:48,623 INFO L225 Difference]: With dead ends: 189 [2022-01-18 14:17:48,623 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 14:17:48,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:48,625 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:48,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 59 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:48,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 14:17:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 101. [2022-01-18 14:17:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 213 transitions. [2022-01-18 14:17:48,635 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 213 transitions. Word has length 15 [2022-01-18 14:17:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:48,635 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 213 transitions. [2022-01-18 14:17:48,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 14:17:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 213 transitions. [2022-01-18 14:17:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:17:48,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:48,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:48,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 14:17:48,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:48,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:48,869 INFO L85 PathProgramCache]: Analyzing trace with hash 704095387, now seen corresponding path program 2 times [2022-01-18 14:17:48,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:48,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807452722] [2022-01-18 14:17:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:48,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:48,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:48,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807452722] [2022-01-18 14:17:48,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807452722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:48,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:48,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:17:48,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392694477] [2022-01-18 14:17:48,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:48,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:17:48,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:48,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:17:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:17:48,904 INFO L87 Difference]: Start difference. First operand 101 states and 213 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:48,940 INFO L93 Difference]: Finished difference Result 120 states and 245 transitions. [2022-01-18 14:17:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:17:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:17:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:48,942 INFO L225 Difference]: With dead ends: 120 [2022-01-18 14:17:48,942 INFO L226 Difference]: Without dead ends: 113 [2022-01-18 14:17:48,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 14:17:48,943 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:48,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-18 14:17:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2022-01-18 14:17:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2022-01-18 14:17:48,952 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2022-01-18 14:17:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:48,952 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2022-01-18 14:17:48,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2022-01-18 14:17:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:17:48,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:48,953 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 14:17:48,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 14:17:48,953 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:48,954 INFO L85 PathProgramCache]: Analyzing trace with hash -583322209, now seen corresponding path program 1 times [2022-01-18 14:17:48,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:48,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558527439] [2022-01-18 14:17:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:48,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:49,117 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 14:17:49,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558527439] [2022-01-18 14:17:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558527439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267947161] [2022-01-18 14:17:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:49,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:49,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:49,119 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 14:17:49,120 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 14:17:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:17:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:49,252 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 14:17:49,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:49,345 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 14:17:49,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267947161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:49,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:49,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-01-18 14:17:49,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483649523] [2022-01-18 14:17:49,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:49,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:17:49,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:17:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:49,347 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:49,666 INFO L93 Difference]: Finished difference Result 372 states and 784 transitions. [2022-01-18 14:17:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:17:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 14:17:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:49,671 INFO L225 Difference]: With dead ends: 372 [2022-01-18 14:17:49,672 INFO L226 Difference]: Without dead ends: 328 [2022-01-18 14:17:49,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:17:49,678 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 173 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:49,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 202 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-18 14:17:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 162. [2022-01-18 14:17:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.3229813664596275) internal successors, (374), 161 states have internal predecessors, (374), 0 states have call successors, (0), 0 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 14:17:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 374 transitions. [2022-01-18 14:17:49,698 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 374 transitions. Word has length 19 [2022-01-18 14:17:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:49,699 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 374 transitions. [2022-01-18 14:17:49,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 374 transitions. [2022-01-18 14:17:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:17:49,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:49,700 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 14:17:49,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:49,919 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 14:17:49,920 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash 304723312, now seen corresponding path program 1 times [2022-01-18 14:17:49,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:49,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231273192] [2022-01-18 14:17:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:49,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:49,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:49,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231273192] [2022-01-18 14:17:49,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231273192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:49,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:49,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:17:49,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382375495] [2022-01-18 14:17:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:49,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:49,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:49,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:49,962 INFO L87 Difference]: Start difference. First operand 162 states and 374 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:49,982 INFO L93 Difference]: Finished difference Result 187 states and 429 transitions. [2022-01-18 14:17:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:17:49,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 14:17:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:49,983 INFO L225 Difference]: With dead ends: 187 [2022-01-18 14:17:49,983 INFO L226 Difference]: Without dead ends: 187 [2022-01-18 14:17:49,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:49,985 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:49,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-18 14:17:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 162. [2022-01-18 14:17:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.329192546583851) internal successors, (375), 161 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 14:17:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 375 transitions. [2022-01-18 14:17:50,005 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 375 transitions. Word has length 19 [2022-01-18 14:17:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:50,005 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 375 transitions. [2022-01-18 14:17:50,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 375 transitions. [2022-01-18 14:17:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:17:50,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:50,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:50,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 14:17:50,007 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash -560508981, now seen corresponding path program 1 times [2022-01-18 14:17:50,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:50,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115690724] [2022-01-18 14:17:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:50,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:50,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:50,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115690724] [2022-01-18 14:17:50,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115690724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:50,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181854267] [2022-01-18 14:17:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:50,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:50,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:50,171 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 14:17:50,174 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 14:17:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:50,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:17:50,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:50,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:50,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181854267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:50,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:50,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-01-18 14:17:50,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386207837] [2022-01-18 14:17:50,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:50,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:17:50,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:17:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:17:50,545 INFO L87 Difference]: Start difference. First operand 162 states and 375 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:51,356 INFO L93 Difference]: Finished difference Result 689 states and 1490 transitions. [2022-01-18 14:17:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:17:51,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:17:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:51,360 INFO L225 Difference]: With dead ends: 689 [2022-01-18 14:17:51,360 INFO L226 Difference]: Without dead ends: 675 [2022-01-18 14:17:51,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 14:17:51,361 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 295 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:51,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 592 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-18 14:17:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 352. [2022-01-18 14:17:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.393162393162393) internal successors, (840), 351 states have internal predecessors, (840), 0 states have call successors, (0), 0 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 14:17:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 840 transitions. [2022-01-18 14:17:51,375 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 840 transitions. Word has length 22 [2022-01-18 14:17:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:51,375 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 840 transitions. [2022-01-18 14:17:51,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 840 transitions. [2022-01-18 14:17:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:17:51,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:51,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:51,396 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 14:17:51,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:51,592 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash 700260299, now seen corresponding path program 2 times [2022-01-18 14:17:51,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:51,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650046276] [2022-01-18 14:17:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:51,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:51,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650046276] [2022-01-18 14:17:51,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650046276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:51,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973396460] [2022-01-18 14:17:51,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:51,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:51,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:51,733 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 14:17:51,734 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 14:17:51,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:51,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:51,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:17:51,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:51,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:52,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973396460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:52,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:52,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-01-18 14:17:52,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105347267] [2022-01-18 14:17:52,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:52,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:17:52,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:17:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:17:52,074 INFO L87 Difference]: Start difference. First operand 352 states and 840 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:52,817 INFO L93 Difference]: Finished difference Result 1141 states and 2511 transitions. [2022-01-18 14:17:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 14:17:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:17:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:52,822 INFO L225 Difference]: With dead ends: 1141 [2022-01-18 14:17:52,822 INFO L226 Difference]: Without dead ends: 1113 [2022-01-18 14:17:52,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:17:52,823 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 322 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:52,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 498 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-18 14:17:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 625. [2022-01-18 14:17:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.4166666666666665) internal successors, (1508), 624 states have internal predecessors, (1508), 0 states have call successors, (0), 0 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 14:17:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1508 transitions. [2022-01-18 14:17:52,839 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1508 transitions. Word has length 22 [2022-01-18 14:17:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:52,839 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1508 transitions. [2022-01-18 14:17:52,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1508 transitions. [2022-01-18 14:17:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:17:52,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:52,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:52,858 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 14:17:53,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:53,057 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash 380237771, now seen corresponding path program 3 times [2022-01-18 14:17:53,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:53,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573977989] [2022-01-18 14:17:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:53,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:53,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:53,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573977989] [2022-01-18 14:17:53,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573977989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:53,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732585233] [2022-01-18 14:17:53,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:53,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:53,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:53,183 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 14:17:53,183 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 14:17:53,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:17:53,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:17:53,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:53,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:53,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732585233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:53,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:53,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-01-18 14:17:53,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340684463] [2022-01-18 14:17:53,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:53,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:17:53,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:53,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:17:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:17:53,526 INFO L87 Difference]: Start difference. First operand 625 states and 1508 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:53,997 INFO L93 Difference]: Finished difference Result 1215 states and 2790 transitions. [2022-01-18 14:17:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:17:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:17:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:54,001 INFO L225 Difference]: With dead ends: 1215 [2022-01-18 14:17:54,001 INFO L226 Difference]: Without dead ends: 1194 [2022-01-18 14:17:54,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:17:54,002 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 189 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:54,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 560 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-01-18 14:17:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 862. [2022-01-18 14:17:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.464576074332172) internal successors, (2122), 861 states have internal predecessors, (2122), 0 states have call successors, (0), 0 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 14:17:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2122 transitions. [2022-01-18 14:17:54,022 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2122 transitions. Word has length 22 [2022-01-18 14:17:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:54,022 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2122 transitions. [2022-01-18 14:17:54,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2122 transitions. [2022-01-18 14:17:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:17:54,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:54,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:54,041 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 14:17:54,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:54,240 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1627974969, now seen corresponding path program 4 times [2022-01-18 14:17:54,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:54,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581484616] [2022-01-18 14:17:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:54,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:54,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581484616] [2022-01-18 14:17:54,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581484616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295280067] [2022-01-18 14:17:54,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:54,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:54,359 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 14:17:54,360 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 14:17:54,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:54,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:54,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:17:54,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:54,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:54,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295280067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:54,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:54,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-01-18 14:17:54,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913881523] [2022-01-18 14:17:54,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:54,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:17:54,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:54,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:17:54,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:17:54,700 INFO L87 Difference]: Start difference. First operand 862 states and 2122 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:55,065 INFO L93 Difference]: Finished difference Result 1178 states and 2781 transitions. [2022-01-18 14:17:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:17:55,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:17:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:55,069 INFO L225 Difference]: With dead ends: 1178 [2022-01-18 14:17:55,069 INFO L226 Difference]: Without dead ends: 1157 [2022-01-18 14:17:55,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:17:55,069 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 151 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:55,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 517 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-18 14:17:55,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 922. [2022-01-18 14:17:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.478827361563518) internal successors, (2283), 921 states have internal predecessors, (2283), 0 states have call successors, (0), 0 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 14:17:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2283 transitions. [2022-01-18 14:17:55,087 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2283 transitions. Word has length 22 [2022-01-18 14:17:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:55,088 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 2283 transitions. [2022-01-18 14:17:55,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2283 transitions. [2022-01-18 14:17:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:17:55,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:55,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:55,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:55,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:55,304 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash -361604473, now seen corresponding path program 2 times [2022-01-18 14:17:55,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:55,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814447644] [2022-01-18 14:17:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:55,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:55,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814447644] [2022-01-18 14:17:55,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814447644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755056615] [2022-01-18 14:17:55,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:55,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:55,343 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 14:17:55,344 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 14:17:55,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:55,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:55,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:17:55,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:55,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:55,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755056615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:55,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:55,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 14:17:55,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925985947] [2022-01-18 14:17:55,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:55,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:55,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:55,454 INFO L87 Difference]: Start difference. First operand 922 states and 2283 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:55,573 INFO L93 Difference]: Finished difference Result 3353 states and 8090 transitions. [2022-01-18 14:17:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:17:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:17:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:55,583 INFO L225 Difference]: With dead ends: 3353 [2022-01-18 14:17:55,584 INFO L226 Difference]: Without dead ends: 3353 [2022-01-18 14:17:55,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:17:55,584 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 136 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:55,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 192 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2022-01-18 14:17:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2738. [2022-01-18 14:17:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2737 states have (on average 2.5637559371574716) internal successors, (7017), 2737 states have internal predecessors, (7017), 0 states have call successors, (0), 0 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 14:17:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 7017 transitions. [2022-01-18 14:17:55,640 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 7017 transitions. Word has length 25 [2022-01-18 14:17:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:55,640 INFO L470 AbstractCegarLoop]: Abstraction has 2738 states and 7017 transitions. [2022-01-18 14:17:55,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 7017 transitions. [2022-01-18 14:17:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:17:55,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:55,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:55,661 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 14:17:55,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:55,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1307585132, now seen corresponding path program 5 times [2022-01-18 14:17:55,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:55,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093895795] [2022-01-18 14:17:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:55,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:55,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:55,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093895795] [2022-01-18 14:17:55,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093895795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:55,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428041798] [2022-01-18 14:17:55,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:55,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:55,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:55,887 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 14:17:55,888 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 14:17:55,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:17:55,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:17:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:55,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:55,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428041798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:55,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:55,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 14:17:55,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541053863] [2022-01-18 14:17:55,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:55,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:17:55,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:17:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:55,975 INFO L87 Difference]: Start difference. First operand 2738 states and 7017 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:56,048 INFO L93 Difference]: Finished difference Result 4288 states and 10732 transitions. [2022-01-18 14:17:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:17:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:17:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:56,060 INFO L225 Difference]: With dead ends: 4288 [2022-01-18 14:17:56,060 INFO L226 Difference]: Without dead ends: 4285 [2022-01-18 14:17:56,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:56,061 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:56,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 91 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2022-01-18 14:17:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3233. [2022-01-18 14:17:56,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3233 states, 3232 states have (on average 2.5693069306930694) internal successors, (8304), 3232 states have internal predecessors, (8304), 0 states have call successors, (0), 0 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 14:17:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 8304 transitions. [2022-01-18 14:17:56,128 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 8304 transitions. Word has length 25 [2022-01-18 14:17:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:56,129 INFO L470 AbstractCegarLoop]: Abstraction has 3233 states and 8304 transitions. [2022-01-18 14:17:56,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 8304 transitions. [2022-01-18 14:17:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:17:56,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:56,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:56,149 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 14:17:56,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 14:17:56,348 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:56,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1500532664, now seen corresponding path program 6 times [2022-01-18 14:17:56,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:56,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165279418] [2022-01-18 14:17:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:56,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:56,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:56,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165279418] [2022-01-18 14:17:56,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165279418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:56,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025478278] [2022-01-18 14:17:56,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:56,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:56,370 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 14:17:56,371 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 14:17:56,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:17:56,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:17:56,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:56,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025478278] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:56,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:56,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 14:17:56,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960482726] [2022-01-18 14:17:56,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:56,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:17:56,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:56,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:17:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:56,462 INFO L87 Difference]: Start difference. First operand 3233 states and 8304 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:56,517 INFO L93 Difference]: Finished difference Result 5574 states and 14046 transitions. [2022-01-18 14:17:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:17:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:17:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:56,535 INFO L225 Difference]: With dead ends: 5574 [2022-01-18 14:17:56,535 INFO L226 Difference]: Without dead ends: 5568 [2022-01-18 14:17:56,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:56,536 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:56,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 75 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2022-01-18 14:17:56,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 3783. [2022-01-18 14:17:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 2.581702802749868) internal successors, (9764), 3782 states have internal predecessors, (9764), 0 states have call successors, (0), 0 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 14:17:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 9764 transitions. [2022-01-18 14:17:56,618 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 9764 transitions. Word has length 25 [2022-01-18 14:17:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:56,618 INFO L470 AbstractCegarLoop]: Abstraction has 3783 states and 9764 transitions. [2022-01-18 14:17:56,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 9764 transitions. [2022-01-18 14:17:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:17:56,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:56,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:56,640 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 14:17:56,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:56,836 INFO L85 PathProgramCache]: Analyzing trace with hash -137039792, now seen corresponding path program 7 times [2022-01-18 14:17:56,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:56,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35512186] [2022-01-18 14:17:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:56,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:56,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35512186] [2022-01-18 14:17:56,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35512186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269684973] [2022-01-18 14:17:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:56,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:56,862 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 14:17:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:17:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:56,892 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 14:17:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:56,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:56,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269684973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:56,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:56,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:17:56,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137389] [2022-01-18 14:17:56,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:56,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:56,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:56,958 INFO L87 Difference]: Start difference. First operand 3783 states and 9764 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:57,027 INFO L93 Difference]: Finished difference Result 5553 states and 13996 transitions. [2022-01-18 14:17:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:57,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:17:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:57,044 INFO L225 Difference]: With dead ends: 5553 [2022-01-18 14:17:57,044 INFO L226 Difference]: Without dead ends: 5533 [2022-01-18 14:17:57,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:57,045 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:57,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 83 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2022-01-18 14:17:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 4298. [2022-01-18 14:17:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4297 states have (on average 2.5778450081452178) internal successors, (11077), 4297 states have internal predecessors, (11077), 0 states have call successors, (0), 0 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 14:17:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 11077 transitions. [2022-01-18 14:17:57,125 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 11077 transitions. Word has length 25 [2022-01-18 14:17:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:57,126 INFO L470 AbstractCegarLoop]: Abstraction has 4298 states and 11077 transitions. [2022-01-18 14:17:57,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 11077 transitions. [2022-01-18 14:17:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:17:57,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:57,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:57,145 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 14:17:57,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 14:17:57,343 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:57,344 INFO L85 PathProgramCache]: Analyzing trace with hash 552150559, now seen corresponding path program 8 times [2022-01-18 14:17:57,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:57,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548740937] [2022-01-18 14:17:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:57,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:57,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:57,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548740937] [2022-01-18 14:17:57,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548740937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:57,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893518174] [2022-01-18 14:17:57,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:57,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:57,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:57,481 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 14:17:57,482 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 14:17:57,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:57,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:17:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:57,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:57,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893518174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:57,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:57,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2022-01-18 14:17:57,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216040728] [2022-01-18 14:17:57,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:57,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:17:57,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:17:57,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:17:57,892 INFO L87 Difference]: Start difference. First operand 4298 states and 11077 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:58,882 INFO L93 Difference]: Finished difference Result 7346 states and 18226 transitions. [2022-01-18 14:17:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 14:17:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:17:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:58,897 INFO L225 Difference]: With dead ends: 7346 [2022-01-18 14:17:58,897 INFO L226 Difference]: Without dead ends: 7310 [2022-01-18 14:17:58,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 14:17:58,898 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 345 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:58,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1074 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:17:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7310 states. [2022-01-18 14:17:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7310 to 5686. [2022-01-18 14:17:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 2.573262972735268) internal successors, (14629), 5685 states have internal predecessors, (14629), 0 states have call successors, (0), 0 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 14:17:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 14629 transitions. [2022-01-18 14:17:59,011 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 14629 transitions. Word has length 25 [2022-01-18 14:17:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:59,011 INFO L470 AbstractCegarLoop]: Abstraction has 5686 states and 14629 transitions. [2022-01-18 14:17:59,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 14629 transitions. [2022-01-18 14:17:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:17:59,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:59,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:59,032 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 14:17:59,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 14:17:59,232 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1395198643, now seen corresponding path program 9 times [2022-01-18 14:17:59,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341379063] [2022-01-18 14:17:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:59,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:59,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341379063] [2022-01-18 14:17:59,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341379063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968399358] [2022-01-18 14:17:59,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:59,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:59,405 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 14:17:59,406 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 14:17:59,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:17:59,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:59,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:17:59,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:59,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:59,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968399358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:59,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:59,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2022-01-18 14:17:59,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890386165] [2022-01-18 14:17:59,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:59,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:17:59,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:59,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:17:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:17:59,816 INFO L87 Difference]: Start difference. First operand 5686 states and 14629 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:00,532 INFO L93 Difference]: Finished difference Result 7858 states and 19776 transitions. [2022-01-18 14:18:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 14:18:00,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:18:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:00,548 INFO L225 Difference]: With dead ends: 7858 [2022-01-18 14:18:00,548 INFO L226 Difference]: Without dead ends: 7822 [2022-01-18 14:18:00,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 14:18:00,549 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 308 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:00,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 959 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2022-01-18 14:18:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 6908. [2022-01-18 14:18:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6908 states, 6907 states have (on average 2.578398725930216) internal successors, (17809), 6907 states have internal predecessors, (17809), 0 states have call successors, (0), 0 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 14:18:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 17809 transitions. [2022-01-18 14:18:00,706 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 17809 transitions. Word has length 25 [2022-01-18 14:18:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:00,706 INFO L470 AbstractCegarLoop]: Abstraction has 6908 states and 17809 transitions. [2022-01-18 14:18:00,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:00,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 17809 transitions. [2022-01-18 14:18:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:18:00,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:00,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:00,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:00,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 14:18:00,927 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1207140103, now seen corresponding path program 10 times [2022-01-18 14:18:00,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:00,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415114841] [2022-01-18 14:18:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:00,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:01,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:01,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415114841] [2022-01-18 14:18:01,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415114841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:01,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767493490] [2022-01-18 14:18:01,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:01,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:01,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:01,091 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 14:18:01,092 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 14:18:01,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:01,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:01,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:01,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:01,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767493490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:01,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:01,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-01-18 14:18:01,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114196553] [2022-01-18 14:18:01,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:01,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 14:18:01,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 14:18:01,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:18:01,537 INFO L87 Difference]: Start difference. First operand 6908 states and 17809 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:02,932 INFO L93 Difference]: Finished difference Result 12698 states and 31660 transitions. [2022-01-18 14:18:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 14:18:02,933 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:18:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:02,954 INFO L225 Difference]: With dead ends: 12698 [2022-01-18 14:18:02,955 INFO L226 Difference]: Without dead ends: 12662 [2022-01-18 14:18:02,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=484, Invalid=3422, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 14:18:02,958 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 323 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:02,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1740 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:18:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2022-01-18 14:18:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 10282. [2022-01-18 14:18:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10282 states, 10281 states have (on average 2.5722206011088415) internal successors, (26445), 10281 states have internal predecessors, (26445), 0 states have call successors, (0), 0 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 14:18:03,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10282 states to 10282 states and 26445 transitions. [2022-01-18 14:18:03,172 INFO L78 Accepts]: Start accepts. Automaton has 10282 states and 26445 transitions. Word has length 25 [2022-01-18 14:18:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:03,173 INFO L470 AbstractCegarLoop]: Abstraction has 10282 states and 26445 transitions. [2022-01-18 14:18:03,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:03,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10282 states and 26445 transitions. [2022-01-18 14:18:03,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:18:03,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:03,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:03,215 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 14:18:03,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 14:18:03,399 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash 563330891, now seen corresponding path program 11 times [2022-01-18 14:18:03,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:03,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418669052] [2022-01-18 14:18:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:03,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:03,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:03,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418669052] [2022-01-18 14:18:03,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418669052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:03,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708477345] [2022-01-18 14:18:03,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:03,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:03,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:03,559 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 14:18:03,559 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 14:18:03,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:18:03,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:03,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:18:03,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:03,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:04,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708477345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:04,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:04,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-01-18 14:18:04,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273081965] [2022-01-18 14:18:04,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:04,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:18:04,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:18:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:18:04,097 INFO L87 Difference]: Start difference. First operand 10282 states and 26445 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 14:18:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:08,289 INFO L93 Difference]: Finished difference Result 19095 states and 47762 transitions. [2022-01-18 14:18:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-18 14:18:08,291 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 28 [2022-01-18 14:18:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:08,322 INFO L225 Difference]: With dead ends: 19095 [2022-01-18 14:18:08,322 INFO L226 Difference]: Without dead ends: 19030 [2022-01-18 14:18:08,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2059, Invalid=15497, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 14:18:08,326 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 1016 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:08,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1995 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:18:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19030 states. [2022-01-18 14:18:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19030 to 16042. [2022-01-18 14:18:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16042 states, 16041 states have (on average 2.5694158718284394) internal successors, (41216), 16041 states have internal predecessors, (41216), 0 states have call successors, (0), 0 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 14:18:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16042 states to 16042 states and 41216 transitions. [2022-01-18 14:18:08,668 INFO L78 Accepts]: Start accepts. Automaton has 16042 states and 41216 transitions. Word has length 28 [2022-01-18 14:18:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:08,669 INFO L470 AbstractCegarLoop]: Abstraction has 16042 states and 41216 transitions. [2022-01-18 14:18:08,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 14:18:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 16042 states and 41216 transitions. [2022-01-18 14:18:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:18:08,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:08,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:08,700 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 14:18:08,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:08,899 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash 384948611, now seen corresponding path program 12 times [2022-01-18 14:18:08,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:08,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874401508] [2022-01-18 14:18:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:08,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:09,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874401508] [2022-01-18 14:18:09,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874401508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734307584] [2022-01-18 14:18:09,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:09,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:09,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:09,067 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 14:18:09,067 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 14:18:09,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:18:09,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:09,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:18:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:09,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:09,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734307584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:09,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:09,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-01-18 14:18:09,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089538639] [2022-01-18 14:18:09,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:09,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:18:09,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:18:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:18:09,623 INFO L87 Difference]: Start difference. First operand 16042 states and 41216 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 14:18:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:13,183 INFO L93 Difference]: Finished difference Result 33116 states and 82977 transitions. [2022-01-18 14:18:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-18 14:18:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 28 [2022-01-18 14:18:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:13,248 INFO L225 Difference]: With dead ends: 33116 [2022-01-18 14:18:13,248 INFO L226 Difference]: Without dead ends: 33054 [2022-01-18 14:18:13,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4789 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1755, Invalid=12765, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 14:18:13,251 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 907 mSDsluCounter, 2435 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:13,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 2290 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:18:13,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33054 states. [2022-01-18 14:18:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33054 to 28120. [2022-01-18 14:18:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28120 states, 28119 states have (on average 2.5689391514634234) internal successors, (72236), 28119 states have internal predecessors, (72236), 0 states have call successors, (0), 0 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 14:18:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28120 states to 28120 states and 72236 transitions. [2022-01-18 14:18:13,819 INFO L78 Accepts]: Start accepts. Automaton has 28120 states and 72236 transitions. Word has length 28 [2022-01-18 14:18:13,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:13,819 INFO L470 AbstractCegarLoop]: Abstraction has 28120 states and 72236 transitions. [2022-01-18 14:18:13,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 14:18:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 28120 states and 72236 transitions. [2022-01-18 14:18:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:18:13,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:13,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:13,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 14:18:14,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 14:18:14,051 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1131111861, now seen corresponding path program 13 times [2022-01-18 14:18:14,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:14,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450886905] [2022-01-18 14:18:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:14,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:14,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:14,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450886905] [2022-01-18 14:18:14,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450886905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:14,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702430882] [2022-01-18 14:18:14,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:14,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:14,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:14,213 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 14:18:14,214 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 14:18:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:18:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:14,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:18:14,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702430882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:14,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:14,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2022-01-18 14:18:14,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154465054] [2022-01-18 14:18:14,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:14,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:18:14,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:18:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:18:14,642 INFO L87 Difference]: Start difference. First operand 28120 states and 72236 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:16,559 INFO L93 Difference]: Finished difference Result 32737 states and 83118 transitions. [2022-01-18 14:18:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 14:18:16,559 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:18:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:16,624 INFO L225 Difference]: With dead ends: 32737 [2022-01-18 14:18:16,624 INFO L226 Difference]: Without dead ends: 32688 [2022-01-18 14:18:16,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=661, Invalid=5345, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 14:18:16,626 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 442 mSDsluCounter, 2229 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:16,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1891 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:18:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32688 states. [2022-01-18 14:18:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32688 to 30427. [2022-01-18 14:18:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30427 states, 30426 states have (on average 2.5686583842766058) internal successors, (78154), 30426 states have internal predecessors, (78154), 0 states have call successors, (0), 0 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 14:18:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30427 states to 30427 states and 78154 transitions. [2022-01-18 14:18:17,396 INFO L78 Accepts]: Start accepts. Automaton has 30427 states and 78154 transitions. Word has length 28 [2022-01-18 14:18:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:17,397 INFO L470 AbstractCegarLoop]: Abstraction has 30427 states and 78154 transitions. [2022-01-18 14:18:17,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 30427 states and 78154 transitions. [2022-01-18 14:18:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:18:17,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:17,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:17,440 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 14:18:17,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:17,624 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1451134389, now seen corresponding path program 14 times [2022-01-18 14:18:17,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:17,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297974104] [2022-01-18 14:18:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:17,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:17,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297974104] [2022-01-18 14:18:17,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297974104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102104087] [2022-01-18 14:18:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:17,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:17,769 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 14:18:17,770 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 14:18:17,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:18:17,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:18,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102104087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:18,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:18,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2022-01-18 14:18:18,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286238237] [2022-01-18 14:18:18,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:18,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:18:18,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:18:18,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:18:18,215 INFO L87 Difference]: Start difference. First operand 30427 states and 78154 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:19,598 INFO L93 Difference]: Finished difference Result 34892 states and 88413 transitions. [2022-01-18 14:18:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 14:18:19,598 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:18:19,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:19,661 INFO L225 Difference]: With dead ends: 34892 [2022-01-18 14:18:19,661 INFO L226 Difference]: Without dead ends: 34822 [2022-01-18 14:18:19,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=503, Invalid=3919, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 14:18:19,662 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 435 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:19,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1435 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:18:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34822 states. [2022-01-18 14:18:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34822 to 31263. [2022-01-18 14:18:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31263 states, 31262 states have (on average 2.5682297997568933) internal successors, (80288), 31262 states have internal predecessors, (80288), 0 states have call successors, (0), 0 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 14:18:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31263 states to 31263 states and 80288 transitions. [2022-01-18 14:18:20,198 INFO L78 Accepts]: Start accepts. Automaton has 31263 states and 80288 transitions. Word has length 28 [2022-01-18 14:18:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:20,198 INFO L470 AbstractCegarLoop]: Abstraction has 31263 states and 80288 transitions. [2022-01-18 14:18:20,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 31263 states and 80288 transitions. [2022-01-18 14:18:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:18:20,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:20,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:20,231 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 14:18:20,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:20,431 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 835620167, now seen corresponding path program 15 times [2022-01-18 14:18:20,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:20,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389014981] [2022-01-18 14:18:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:20,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:20,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389014981] [2022-01-18 14:18:20,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389014981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536742767] [2022-01-18 14:18:20,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:20,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:20,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:20,582 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 14:18:20,583 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 14:18:20,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:18:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:20,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:18:20,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:20,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:18:21,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536742767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:21,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:21,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2022-01-18 14:18:21,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590144824] [2022-01-18 14:18:21,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:21,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:18:21,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:21,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:18:21,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:18:21,121 INFO L87 Difference]: Start difference. First operand 31263 states and 80288 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:22,237 INFO L93 Difference]: Finished difference Result 37680 states and 95652 transitions. [2022-01-18 14:18:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 14:18:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:18:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:22,311 INFO L225 Difference]: With dead ends: 37680 [2022-01-18 14:18:22,311 INFO L226 Difference]: Without dead ends: 37644 [2022-01-18 14:18:22,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=330, Invalid=2532, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 14:18:22,312 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 341 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:22,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1256 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:18:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37644 states. [2022-01-18 14:18:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37644 to 34762. [2022-01-18 14:18:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34762 states, 34761 states have (on average 2.574925922729496) internal successors, (89507), 34761 states have internal predecessors, (89507), 0 states have call successors, (0), 0 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 14:18:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34762 states to 34762 states and 89507 transitions. [2022-01-18 14:18:22,973 INFO L78 Accepts]: Start accepts. Automaton has 34762 states and 89507 transitions. Word has length 28 [2022-01-18 14:18:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:22,973 INFO L470 AbstractCegarLoop]: Abstraction has 34762 states and 89507 transitions. [2022-01-18 14:18:22,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 34762 states and 89507 transitions. [2022-01-18 14:18:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:22,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:22,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:23,005 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 14:18:23,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:23,191 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash -807763788, now seen corresponding path program 16 times [2022-01-18 14:18:23,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219668688] [2022-01-18 14:18:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:23,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:23,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219668688] [2022-01-18 14:18:23,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219668688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493054141] [2022-01-18 14:18:23,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:23,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:23,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:23,237 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 14:18:23,241 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 14:18:23,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:23,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 14:18:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:23,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:23,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493054141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:23,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:23,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2022-01-18 14:18:23,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950225911] [2022-01-18 14:18:23,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:23,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:18:23,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:18:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:23,340 INFO L87 Difference]: Start difference. First operand 34762 states and 89507 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:23,556 INFO L93 Difference]: Finished difference Result 26614 states and 65956 transitions. [2022-01-18 14:18:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:18:23,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:18:23,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:23,615 INFO L225 Difference]: With dead ends: 26614 [2022-01-18 14:18:23,615 INFO L226 Difference]: Without dead ends: 26614 [2022-01-18 14:18:23,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:18:23,617 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 106 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:23,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 175 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26614 states. [2022-01-18 14:18:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26614 to 23391. [2022-01-18 14:18:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23391 states, 23390 states have (on average 2.534972210346302) internal successors, (59293), 23390 states have internal predecessors, (59293), 0 states have call successors, (0), 0 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 14:18:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23391 states to 23391 states and 59293 transitions. [2022-01-18 14:18:24,228 INFO L78 Accepts]: Start accepts. Automaton has 23391 states and 59293 transitions. Word has length 29 [2022-01-18 14:18:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:24,228 INFO L470 AbstractCegarLoop]: Abstraction has 23391 states and 59293 transitions. [2022-01-18 14:18:24,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23391 states and 59293 transitions. [2022-01-18 14:18:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:24,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:24,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:24,257 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 14:18:24,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:24,442 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:24,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash -183781140, now seen corresponding path program 17 times [2022-01-18 14:18:24,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:24,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700402109] [2022-01-18 14:18:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:24,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:24,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:24,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700402109] [2022-01-18 14:18:24,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700402109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:24,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777317746] [2022-01-18 14:18:24,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:24,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:24,475 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 14:18:24,475 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 14:18:24,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:18:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 14:18:24,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:24,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:24,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777317746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:24,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:24,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 14:18:24,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304145108] [2022-01-18 14:18:24,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:24,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:24,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:24,558 INFO L87 Difference]: Start difference. First operand 23391 states and 59293 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:24,743 INFO L93 Difference]: Finished difference Result 19626 states and 48862 transitions. [2022-01-18 14:18:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:18:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:18:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:24,776 INFO L225 Difference]: With dead ends: 19626 [2022-01-18 14:18:24,776 INFO L226 Difference]: Without dead ends: 19088 [2022-01-18 14:18:24,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:18:24,776 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:24,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19088 states. [2022-01-18 14:18:25,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19088 to 18247. [2022-01-18 14:18:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18247 states, 18246 states have (on average 2.5042749095692205) internal successors, (45693), 18246 states have internal predecessors, (45693), 0 states have call successors, (0), 0 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 14:18:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18247 states to 18247 states and 45693 transitions. [2022-01-18 14:18:25,196 INFO L78 Accepts]: Start accepts. Automaton has 18247 states and 45693 transitions. Word has length 29 [2022-01-18 14:18:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:25,196 INFO L470 AbstractCegarLoop]: Abstraction has 18247 states and 45693 transitions. [2022-01-18 14:18:25,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 18247 states and 45693 transitions. [2022-01-18 14:18:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:25,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:25,203 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:25,218 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 14:18:25,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 14:18:25,405 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:25,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1939288821, now seen corresponding path program 3 times [2022-01-18 14:18:25,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:25,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754639874] [2022-01-18 14:18:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:25,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:25,431 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 14:18:25,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:25,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754639874] [2022-01-18 14:18:25,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754639874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:25,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226643154] [2022-01-18 14:18:25,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:25,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:25,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:25,433 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 14:18:25,434 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 14:18:25,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:18:25,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:25,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:18:25,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:25,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:25,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226643154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:25,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:25,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:18:25,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100584277] [2022-01-18 14:18:25,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:25,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:18:25,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:18:25,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:18:25,543 INFO L87 Difference]: Start difference. First operand 18247 states and 45693 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:18:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:25,665 INFO L93 Difference]: Finished difference Result 23138 states and 57057 transitions. [2022-01-18 14:18:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:18:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 14:18:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:25,702 INFO L225 Difference]: With dead ends: 23138 [2022-01-18 14:18:25,702 INFO L226 Difference]: Without dead ends: 23135 [2022-01-18 14:18:25,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:25,704 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:25,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 149 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23135 states. [2022-01-18 14:18:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23135 to 19973. [2022-01-18 14:18:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19973 states, 19972 states have (on average 2.5174243941518126) internal successors, (50278), 19972 states have internal predecessors, (50278), 0 states have call successors, (0), 0 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 14:18:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19973 states to 19973 states and 50278 transitions. [2022-01-18 14:18:26,086 INFO L78 Accepts]: Start accepts. Automaton has 19973 states and 50278 transitions. Word has length 29 [2022-01-18 14:18:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:26,086 INFO L470 AbstractCegarLoop]: Abstraction has 19973 states and 50278 transitions. [2022-01-18 14:18:26,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:18:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 19973 states and 50278 transitions. [2022-01-18 14:18:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:26,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:26,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:26,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 14:18:26,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 14:18:26,301 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash -976130165, now seen corresponding path program 4 times [2022-01-18 14:18:26,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:26,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227043095] [2022-01-18 14:18:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:26,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:26,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:26,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227043095] [2022-01-18 14:18:26,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227043095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:26,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151461166] [2022-01-18 14:18:26,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:26,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:26,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:26,329 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 14:18:26,330 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 14:18:26,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:26,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:18:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:26,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:26,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151461166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:26,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:26,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:18:26,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012197402] [2022-01-18 14:18:26,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:26,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:18:26,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:18:26,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:18:26,422 INFO L87 Difference]: Start difference. First operand 19973 states and 50278 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:26,559 INFO L93 Difference]: Finished difference Result 30211 states and 74727 transitions. [2022-01-18 14:18:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:18:26,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:18:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:26,611 INFO L225 Difference]: With dead ends: 30211 [2022-01-18 14:18:26,611 INFO L226 Difference]: Without dead ends: 30205 [2022-01-18 14:18:26,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:26,612 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:26,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 108 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30205 states. [2022-01-18 14:18:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30205 to 21738. [2022-01-18 14:18:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21738 states, 21737 states have (on average 2.5046234530984037) internal successors, (54443), 21737 states have internal predecessors, (54443), 0 states have call successors, (0), 0 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 14:18:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21738 states to 21738 states and 54443 transitions. [2022-01-18 14:18:27,042 INFO L78 Accepts]: Start accepts. Automaton has 21738 states and 54443 transitions. Word has length 29 [2022-01-18 14:18:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:27,042 INFO L470 AbstractCegarLoop]: Abstraction has 21738 states and 54443 transitions. [2022-01-18 14:18:27,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 21738 states and 54443 transitions. [2022-01-18 14:18:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:27,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:27,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:27,067 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 14:18:27,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:27,251 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1681264675, now seen corresponding path program 5 times [2022-01-18 14:18:27,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:27,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696308066] [2022-01-18 14:18:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:27,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:27,281 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 14:18:27,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:27,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696308066] [2022-01-18 14:18:27,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696308066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:27,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395222573] [2022-01-18 14:18:27,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:27,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:27,283 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 14:18:27,284 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 14:18:27,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:18:27,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:18:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:27,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:27,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395222573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:27,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:27,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:18:27,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356573505] [2022-01-18 14:18:27,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:27,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:18:27,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:18:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:18:27,398 INFO L87 Difference]: Start difference. First operand 21738 states and 54443 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:27,556 INFO L93 Difference]: Finished difference Result 27079 states and 66694 transitions. [2022-01-18 14:18:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:18:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:18:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:27,609 INFO L225 Difference]: With dead ends: 27079 [2022-01-18 14:18:27,609 INFO L226 Difference]: Without dead ends: 27067 [2022-01-18 14:18:27,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:18:27,610 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:27,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 120 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27067 states. [2022-01-18 14:18:28,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27067 to 22680. [2022-01-18 14:18:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22680 states, 22679 states have (on average 2.5144847656422242) internal successors, (57026), 22679 states have internal predecessors, (57026), 0 states have call successors, (0), 0 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 14:18:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22680 states to 22680 states and 57026 transitions. [2022-01-18 14:18:28,114 INFO L78 Accepts]: Start accepts. Automaton has 22680 states and 57026 transitions. Word has length 29 [2022-01-18 14:18:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:28,114 INFO L470 AbstractCegarLoop]: Abstraction has 22680 states and 57026 transitions. [2022-01-18 14:18:28,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 22680 states and 57026 transitions. [2022-01-18 14:18:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:28,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:28,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:28,139 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 14:18:28,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:28,330 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash -587660293, now seen corresponding path program 18 times [2022-01-18 14:18:28,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316487455] [2022-01-18 14:18:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:28,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:28,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:28,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316487455] [2022-01-18 14:18:28,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316487455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944468716] [2022-01-18 14:18:28,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:28,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:28,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:28,353 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 14:18:28,354 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 14:18:28,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:18:28,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:28,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:18:28,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:28,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:28,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944468716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:28,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:28,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:18:28,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381997491] [2022-01-18 14:18:28,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:28,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:18:28,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:28,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:18:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:18:28,458 INFO L87 Difference]: Start difference. First operand 22680 states and 57026 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:18:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:28,671 INFO L93 Difference]: Finished difference Result 28120 states and 70004 transitions. [2022-01-18 14:18:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:18:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 14:18:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:28,719 INFO L225 Difference]: With dead ends: 28120 [2022-01-18 14:18:28,720 INFO L226 Difference]: Without dead ends: 27988 [2022-01-18 14:18:28,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:28,720 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 75 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:28,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 102 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27988 states. [2022-01-18 14:18:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27988 to 27218. [2022-01-18 14:18:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27218 states, 27217 states have (on average 2.5050152478230516) internal successors, (68179), 27217 states have internal predecessors, (68179), 0 states have call successors, (0), 0 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 14:18:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27218 states to 27218 states and 68179 transitions. [2022-01-18 14:18:29,119 INFO L78 Accepts]: Start accepts. Automaton has 27218 states and 68179 transitions. Word has length 29 [2022-01-18 14:18:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:29,119 INFO L470 AbstractCegarLoop]: Abstraction has 27218 states and 68179 transitions. [2022-01-18 14:18:29,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:18:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 27218 states and 68179 transitions. [2022-01-18 14:18:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:29,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:29,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:29,145 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 14:18:29,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 14:18:29,345 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1682739263, now seen corresponding path program 19 times [2022-01-18 14:18:29,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141539099] [2022-01-18 14:18:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:29,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:29,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141539099] [2022-01-18 14:18:29,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141539099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042774732] [2022-01-18 14:18:29,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:29,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:29,446 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 14:18:29,447 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 14:18:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:18:29,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:29,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:29,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042774732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:29,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:29,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 14:18:29,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985249586] [2022-01-18 14:18:29,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:29,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:18:29,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:18:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:18:29,558 INFO L87 Difference]: Start difference. First operand 27218 states and 68179 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:18:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:29,698 INFO L93 Difference]: Finished difference Result 27540 states and 68054 transitions. [2022-01-18 14:18:29,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:18:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 14:18:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:29,748 INFO L225 Difference]: With dead ends: 27540 [2022-01-18 14:18:29,748 INFO L226 Difference]: Without dead ends: 27537 [2022-01-18 14:18:29,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:29,748 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:29,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27537 states. [2022-01-18 14:18:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27537 to 27194. [2022-01-18 14:18:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27194 states, 27193 states have (on average 2.4762254992093555) internal successors, (67336), 27193 states have internal predecessors, (67336), 0 states have call successors, (0), 0 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 14:18:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27194 states to 27194 states and 67336 transitions. [2022-01-18 14:18:30,316 INFO L78 Accepts]: Start accepts. Automaton has 27194 states and 67336 transitions. Word has length 29 [2022-01-18 14:18:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:30,317 INFO L470 AbstractCegarLoop]: Abstraction has 27194 states and 67336 transitions. [2022-01-18 14:18:30,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:18:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27194 states and 67336 transitions. [2022-01-18 14:18:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:30,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:30,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:30,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 14:18:30,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 14:18:30,543 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash -712336569, now seen corresponding path program 20 times [2022-01-18 14:18:30,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:30,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947629570] [2022-01-18 14:18:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:30,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:30,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947629570] [2022-01-18 14:18:30,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947629570] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797452938] [2022-01-18 14:18:30,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:30,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:30,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:30,578 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 14:18:30,579 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 14:18:30,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:30,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:18:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:30,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:30,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797452938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:30,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:30,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 14:18:30,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084889329] [2022-01-18 14:18:30,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:30,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:18:30,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:30,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:18:30,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:18:30,671 INFO L87 Difference]: Start difference. First operand 27194 states and 67336 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 14:18:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:30,805 INFO L93 Difference]: Finished difference Result 31849 states and 78450 transitions. [2022-01-18 14:18:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:18:30,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2022-01-18 14:18:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:30,862 INFO L225 Difference]: With dead ends: 31849 [2022-01-18 14:18:30,863 INFO L226 Difference]: Without dead ends: 31837 [2022-01-18 14:18:30,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:18:30,863 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:30,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 97 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31837 states. [2022-01-18 14:18:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31837 to 31644. [2022-01-18 14:18:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31644 states, 31643 states have (on average 2.4666118888853776) internal successors, (78051), 31643 states have internal predecessors, (78051), 0 states have call successors, (0), 0 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 14:18:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31644 states to 31644 states and 78051 transitions. [2022-01-18 14:18:31,467 INFO L78 Accepts]: Start accepts. Automaton has 31644 states and 78051 transitions. Word has length 29 [2022-01-18 14:18:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:31,467 INFO L470 AbstractCegarLoop]: Abstraction has 31644 states and 78051 transitions. [2022-01-18 14:18:31,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 14:18:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 31644 states and 78051 transitions. [2022-01-18 14:18:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:31,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:31,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:31,492 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 14:18:31,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 14:18:31,676 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:31,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:31,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1117704309, now seen corresponding path program 21 times [2022-01-18 14:18:31,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:31,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055189300] [2022-01-18 14:18:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:31,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:31,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:31,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055189300] [2022-01-18 14:18:31,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055189300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:31,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674321393] [2022-01-18 14:18:31,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:31,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:31,699 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 14:18:31,700 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 14:18:31,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:18:31,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:18:31,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:31,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:31,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674321393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:31,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:31,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 14:18:31,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892212432] [2022-01-18 14:18:31,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:31,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:18:31,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:18:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:18:31,799 INFO L87 Difference]: Start difference. First operand 31644 states and 78051 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 14:18:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:32,014 INFO L93 Difference]: Finished difference Result 32521 states and 79874 transitions. [2022-01-18 14:18:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:18:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2022-01-18 14:18:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:32,070 INFO L225 Difference]: With dead ends: 32521 [2022-01-18 14:18:32,071 INFO L226 Difference]: Without dead ends: 32518 [2022-01-18 14:18:32,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:32,071 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:32,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 78 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32518 states. [2022-01-18 14:18:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32518 to 32276. [2022-01-18 14:18:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32276 states, 32275 states have (on average 2.4610069713400464) internal successors, (79429), 32275 states have internal predecessors, (79429), 0 states have call successors, (0), 0 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 14:18:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32276 states to 32276 states and 79429 transitions. [2022-01-18 14:18:32,581 INFO L78 Accepts]: Start accepts. Automaton has 32276 states and 79429 transitions. Word has length 29 [2022-01-18 14:18:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:32,581 INFO L470 AbstractCegarLoop]: Abstraction has 32276 states and 79429 transitions. [2022-01-18 14:18:32,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 14:18:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 32276 states and 79429 transitions. [2022-01-18 14:18:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:18:32,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:32,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:32,605 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 14:18:32,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:32,791 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash -652390267, now seen corresponding path program 22 times [2022-01-18 14:18:32,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:32,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933673222] [2022-01-18 14:18:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:32,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:32,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:32,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933673222] [2022-01-18 14:18:32,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933673222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:32,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221684530] [2022-01-18 14:18:32,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:32,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:32,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:32,822 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 14:18:32,826 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 14:18:32,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:32,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:18:32,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:32,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:32,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221684530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:32,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:32,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:18:32,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814553864] [2022-01-18 14:18:32,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:32,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:18:32,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:18:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:18:32,914 INFO L87 Difference]: Start difference. First operand 32276 states and 79429 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 14:18:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:33,064 INFO L93 Difference]: Finished difference Result 32461 states and 78954 transitions. [2022-01-18 14:18:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:18:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 29 [2022-01-18 14:18:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:33,129 INFO L225 Difference]: With dead ends: 32461 [2022-01-18 14:18:33,130 INFO L226 Difference]: Without dead ends: 32458 [2022-01-18 14:18:33,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:18:33,130 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:33,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 103 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:18:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32458 states. [2022-01-18 14:18:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32458 to 31677. [2022-01-18 14:18:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31677 states, 31676 states have (on average 2.4392600075767144) internal successors, (77266), 31676 states have internal predecessors, (77266), 0 states have call successors, (0), 0 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 14:18:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31677 states to 31677 states and 77266 transitions. [2022-01-18 14:18:33,714 INFO L78 Accepts]: Start accepts. Automaton has 31677 states and 77266 transitions. Word has length 29 [2022-01-18 14:18:33,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:33,714 INFO L470 AbstractCegarLoop]: Abstraction has 31677 states and 77266 transitions. [2022-01-18 14:18:33,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 14:18:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 31677 states and 77266 transitions. [2022-01-18 14:18:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:18:33,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:33,725 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:33,740 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 14:18:33,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:33,931 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1949861535, now seen corresponding path program 23 times [2022-01-18 14:18:33,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:33,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744655904] [2022-01-18 14:18:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:33,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:34,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744655904] [2022-01-18 14:18:34,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744655904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556043687] [2022-01-18 14:18:34,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:34,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:34,239 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 14:18:34,240 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 14:18:34,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:18:34,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:34,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 14:18:34,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:34,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:34,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556043687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:34,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:34,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2022-01-18 14:18:34,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627934358] [2022-01-18 14:18:34,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:34,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 14:18:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 14:18:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:18:34,904 INFO L87 Difference]: Start difference. First operand 31677 states and 77266 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 14:18:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:39,739 INFO L93 Difference]: Finished difference Result 58198 states and 139350 transitions. [2022-01-18 14:18:39,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 14:18:39,739 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 14:18:39,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:39,865 INFO L225 Difference]: With dead ends: 58198 [2022-01-18 14:18:39,865 INFO L226 Difference]: Without dead ends: 58059 [2022-01-18 14:18:39,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6410 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2189, Invalid=18117, Unknown=0, NotChecked=0, Total=20306 [2022-01-18 14:18:39,868 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 589 mSDsluCounter, 4159 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 3939 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:39,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 3939 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 14:18:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58059 states. [2022-01-18 14:18:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58059 to 49360. [2022-01-18 14:18:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49360 states, 49359 states have (on average 2.4268117263315707) internal successors, (119785), 49359 states have internal predecessors, (119785), 0 states have call successors, (0), 0 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 14:18:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49360 states to 49360 states and 119785 transitions. [2022-01-18 14:18:40,816 INFO L78 Accepts]: Start accepts. Automaton has 49360 states and 119785 transitions. Word has length 31 [2022-01-18 14:18:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:40,816 INFO L470 AbstractCegarLoop]: Abstraction has 49360 states and 119785 transitions. [2022-01-18 14:18:40,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 14:18:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 49360 states and 119785 transitions. [2022-01-18 14:18:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:18:40,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:40,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:40,847 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 14:18:41,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:41,032 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 364490902, now seen corresponding path program 24 times [2022-01-18 14:18:41,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804732438] [2022-01-18 14:18:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:41,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:41,188 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 14:18:41,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804732438] [2022-01-18 14:18:41,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804732438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608890117] [2022-01-18 14:18:41,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:41,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:41,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:41,189 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 14:18:41,190 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 14:18:41,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:18:41,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:41,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:41,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:41,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608890117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:41,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:41,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 14:18:41,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376306596] [2022-01-18 14:18:41,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:41,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:18:41,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:41,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:18:41,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:18:41,679 INFO L87 Difference]: Start difference. First operand 49360 states and 119785 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:42,938 INFO L93 Difference]: Finished difference Result 56844 states and 136543 transitions. [2022-01-18 14:18:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 14:18:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:18:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:43,051 INFO L225 Difference]: With dead ends: 56844 [2022-01-18 14:18:43,052 INFO L226 Difference]: Without dead ends: 56827 [2022-01-18 14:18:43,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 14:18:43,052 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 346 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:43,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 949 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:18:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2022-01-18 14:18:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 50980. [2022-01-18 14:18:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50980 states, 50979 states have (on average 2.429882892955923) internal successors, (123873), 50979 states have internal predecessors, (123873), 0 states have call successors, (0), 0 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 14:18:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50980 states to 50980 states and 123873 transitions. [2022-01-18 14:18:44,011 INFO L78 Accepts]: Start accepts. Automaton has 50980 states and 123873 transitions. Word has length 32 [2022-01-18 14:18:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:44,011 INFO L470 AbstractCegarLoop]: Abstraction has 50980 states and 123873 transitions. [2022-01-18 14:18:44,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 50980 states and 123873 transitions. [2022-01-18 14:18:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:18:44,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:44,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:44,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:44,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 14:18:44,225 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash -870392482, now seen corresponding path program 25 times [2022-01-18 14:18:44,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:44,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579359290] [2022-01-18 14:18:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:44,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:44,513 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 14:18:44,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:44,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579359290] [2022-01-18 14:18:44,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579359290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:44,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294636901] [2022-01-18 14:18:44,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:44,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:44,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:44,515 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 14:18:44,515 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 14:18:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:44,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:45,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294636901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:45,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:45,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 14:18:45,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730374563] [2022-01-18 14:18:45,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:45,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:18:45,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:18:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:18:45,018 INFO L87 Difference]: Start difference. First operand 50980 states and 123873 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:45,892 INFO L93 Difference]: Finished difference Result 54768 states and 132232 transitions. [2022-01-18 14:18:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 14:18:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:18:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:46,008 INFO L225 Difference]: With dead ends: 54768 [2022-01-18 14:18:46,008 INFO L226 Difference]: Without dead ends: 54751 [2022-01-18 14:18:46,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=1698, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 14:18:46,009 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 265 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:46,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 699 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54751 states. [2022-01-18 14:18:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54751 to 51314. [2022-01-18 14:18:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51314 states, 51313 states have (on average 2.42998850193908) internal successors, (124690), 51313 states have internal predecessors, (124690), 0 states have call successors, (0), 0 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 14:18:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51314 states to 51314 states and 124690 transitions. [2022-01-18 14:18:47,169 INFO L78 Accepts]: Start accepts. Automaton has 51314 states and 124690 transitions. Word has length 32 [2022-01-18 14:18:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:47,169 INFO L470 AbstractCegarLoop]: Abstraction has 51314 states and 124690 transitions. [2022-01-18 14:18:47,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 51314 states and 124690 transitions. [2022-01-18 14:18:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:18:47,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:47,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:47,202 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 14:18:47,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:47,387 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1401588830, now seen corresponding path program 26 times [2022-01-18 14:18:47,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:47,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811709898] [2022-01-18 14:18:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:47,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:47,528 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 14:18:47,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:47,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811709898] [2022-01-18 14:18:47,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811709898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:47,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936749905] [2022-01-18 14:18:47,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:47,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:47,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:47,529 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 14:18:47,530 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 14:18:47,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:47,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:47,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936749905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:47,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:47,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 14:18:47,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64023496] [2022-01-18 14:18:47,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:47,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:18:47,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:47,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:18:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:18:47,998 INFO L87 Difference]: Start difference. First operand 51314 states and 124690 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:49,262 INFO L93 Difference]: Finished difference Result 64967 states and 156641 transitions. [2022-01-18 14:18:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 14:18:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:18:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:49,414 INFO L225 Difference]: With dead ends: 64967 [2022-01-18 14:18:49,415 INFO L226 Difference]: Without dead ends: 64904 [2022-01-18 14:18:49,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 14:18:49,415 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 277 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:49,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1076 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64904 states. [2022-01-18 14:18:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64904 to 57619. [2022-01-18 14:18:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57619 states, 57618 states have (on average 2.4426220972612724) internal successors, (140739), 57618 states have internal predecessors, (140739), 0 states have call successors, (0), 0 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 14:18:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57619 states to 57619 states and 140739 transitions. [2022-01-18 14:18:50,529 INFO L78 Accepts]: Start accepts. Automaton has 57619 states and 140739 transitions. Word has length 32 [2022-01-18 14:18:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:50,529 INFO L470 AbstractCegarLoop]: Abstraction has 57619 states and 140739 transitions. [2022-01-18 14:18:50,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 57619 states and 140739 transitions. [2022-01-18 14:18:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:18:50,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:50,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:50,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 14:18:50,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:50,749 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:50,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1434729592, now seen corresponding path program 27 times [2022-01-18 14:18:50,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:50,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430783284] [2022-01-18 14:18:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:50,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:51,046 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 14:18:51,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430783284] [2022-01-18 14:18:51,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430783284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964021472] [2022-01-18 14:18:51,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:51,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:51,048 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 14:18:51,049 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 14:18:51,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:18:51,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:51,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:51,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:51,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:51,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964021472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:51,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:51,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-01-18 14:18:51,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943268666] [2022-01-18 14:18:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:51,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:18:51,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:18:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:18:51,582 INFO L87 Difference]: Start difference. First operand 57619 states and 140739 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:54,017 INFO L93 Difference]: Finished difference Result 72626 states and 176105 transitions. [2022-01-18 14:18:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 14:18:54,018 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:18:54,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:54,183 INFO L225 Difference]: With dead ends: 72626 [2022-01-18 14:18:54,183 INFO L226 Difference]: Without dead ends: 72563 [2022-01-18 14:18:54,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=915, Invalid=5405, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 14:18:54,184 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 540 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 1803 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:54,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 2006 Invalid, 1944 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [141 Valid, 1803 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:18:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72563 states. [2022-01-18 14:18:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72563 to 64327. [2022-01-18 14:18:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64327 states, 64326 states have (on average 2.448683269595498) internal successors, (157514), 64326 states have internal predecessors, (157514), 0 states have call successors, (0), 0 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 14:18:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64327 states to 64327 states and 157514 transitions. [2022-01-18 14:18:55,656 INFO L78 Accepts]: Start accepts. Automaton has 64327 states and 157514 transitions. Word has length 32 [2022-01-18 14:18:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:55,656 INFO L470 AbstractCegarLoop]: Abstraction has 64327 states and 157514 transitions. [2022-01-18 14:18:55,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 64327 states and 157514 transitions. [2022-01-18 14:18:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:18:55,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:55,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:55,689 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 14:18:55,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 14:18:55,875 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash 837251720, now seen corresponding path program 28 times [2022-01-18 14:18:55,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:55,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547364297] [2022-01-18 14:18:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:55,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:56,017 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 14:18:56,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:56,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547364297] [2022-01-18 14:18:56,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547364297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:56,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286392623] [2022-01-18 14:18:56,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:56,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:56,019 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 14:18:56,020 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 14:18:56,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:56,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:56,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:56,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286392623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:56,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:56,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 14:18:56,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952238491] [2022-01-18 14:18:56,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:56,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:18:56,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:18:56,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:18:56,503 INFO L87 Difference]: Start difference. First operand 64327 states and 157514 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:57,421 INFO L93 Difference]: Finished difference Result 83954 states and 203391 transitions. [2022-01-18 14:18:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 14:18:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:18:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:57,608 INFO L225 Difference]: With dead ends: 83954 [2022-01-18 14:18:57,608 INFO L226 Difference]: Without dead ends: 83893 [2022-01-18 14:18:57,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 14:18:57,609 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 246 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:57,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 879 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83893 states. [2022-01-18 14:18:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83893 to 73827. [2022-01-18 14:18:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73827 states, 73826 states have (on average 2.455435754341289) internal successors, (181275), 73826 states have internal predecessors, (181275), 0 states have call successors, (0), 0 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 14:18:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73827 states to 73827 states and 181275 transitions. [2022-01-18 14:18:59,282 INFO L78 Accepts]: Start accepts. Automaton has 73827 states and 181275 transitions. Word has length 32 [2022-01-18 14:18:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:59,282 INFO L470 AbstractCegarLoop]: Abstraction has 73827 states and 181275 transitions. [2022-01-18 14:18:59,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 73827 states and 181275 transitions. [2022-01-18 14:18:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:18:59,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:59,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:59,318 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 14:18:59,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 14:18:59,503 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash -609168994, now seen corresponding path program 29 times [2022-01-18 14:18:59,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:59,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721347473] [2022-01-18 14:18:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:59,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:59,619 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 14:18:59,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721347473] [2022-01-18 14:18:59,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721347473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929508811] [2022-01-18 14:18:59,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:59,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:59,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:59,620 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 14:18:59,621 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 14:18:59,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:18:59,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:59,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:00,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929508811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:00,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:00,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 14:19:00,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345354563] [2022-01-18 14:19:00,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:00,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:19:00,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:19:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:19:00,065 INFO L87 Difference]: Start difference. First operand 73827 states and 181275 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:01,733 INFO L93 Difference]: Finished difference Result 79410 states and 194385 transitions. [2022-01-18 14:19:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 14:19:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:19:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:01,896 INFO L225 Difference]: With dead ends: 79410 [2022-01-18 14:19:01,896 INFO L226 Difference]: Without dead ends: 79376 [2022-01-18 14:19:01,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=2591, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 14:19:01,897 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 266 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:01,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 962 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79376 states. [2022-01-18 14:19:03,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79376 to 76802. [2022-01-18 14:19:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76802 states, 76801 states have (on average 2.4606059816929466) internal successors, (188977), 76801 states have internal predecessors, (188977), 0 states have call successors, (0), 0 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 14:19:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76802 states to 76802 states and 188977 transitions. [2022-01-18 14:19:03,586 INFO L78 Accepts]: Start accepts. Automaton has 76802 states and 188977 transitions. Word has length 32 [2022-01-18 14:19:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:03,586 INFO L470 AbstractCegarLoop]: Abstraction has 76802 states and 188977 transitions. [2022-01-18 14:19:03,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:03,586 INFO L276 IsEmpty]: Start isEmpty. Operand 76802 states and 188977 transitions. [2022-01-18 14:19:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:19:03,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:03,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:03,626 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 14:19:03,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 14:19:03,811 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1086215526, now seen corresponding path program 30 times [2022-01-18 14:19:03,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654426049] [2022-01-18 14:19:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:03,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:03,942 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 14:19:03,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654426049] [2022-01-18 14:19:03,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654426049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723991779] [2022-01-18 14:19:03,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:03,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:03,944 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 14:19:03,945 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 14:19:03,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:19:03,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:19:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:04,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:04,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723991779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:04,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:04,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 14:19:04,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515778784] [2022-01-18 14:19:04,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:04,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:19:04,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:19:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:19:04,397 INFO L87 Difference]: Start difference. First operand 76802 states and 188977 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:05,604 INFO L93 Difference]: Finished difference Result 81543 states and 199903 transitions. [2022-01-18 14:19:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 14:19:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:19:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:05,803 INFO L225 Difference]: With dead ends: 81543 [2022-01-18 14:19:05,803 INFO L226 Difference]: Without dead ends: 81497 [2022-01-18 14:19:05,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 14:19:05,804 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 242 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:05,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 566 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:05,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81497 states. [2022-01-18 14:19:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81497 to 79939. [2022-01-18 14:19:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79939 states, 79938 states have (on average 2.4604318346718705) internal successors, (196682), 79938 states have internal predecessors, (196682), 0 states have call successors, (0), 0 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 14:19:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79939 states to 79939 states and 196682 transitions. [2022-01-18 14:19:07,635 INFO L78 Accepts]: Start accepts. Automaton has 79939 states and 196682 transitions. Word has length 32 [2022-01-18 14:19:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:07,635 INFO L470 AbstractCegarLoop]: Abstraction has 79939 states and 196682 transitions. [2022-01-18 14:19:07,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 79939 states and 196682 transitions. [2022-01-18 14:19:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:19:07,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:07,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:07,671 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 14:19:07,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 14:19:07,863 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash 505632738, now seen corresponding path program 31 times [2022-01-18 14:19:07,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:07,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219878979] [2022-01-18 14:19:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:07,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:07,985 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 14:19:07,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219878979] [2022-01-18 14:19:07,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219878979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149066671] [2022-01-18 14:19:07,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:07,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:07,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:07,987 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 14:19:07,987 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 14:19:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:19:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:08,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:08,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149066671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:08,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:08,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-01-18 14:19:08,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604171518] [2022-01-18 14:19:08,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:08,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:19:08,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:19:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:19:08,368 INFO L87 Difference]: Start difference. First operand 79939 states and 196682 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 14:19:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:09,112 INFO L93 Difference]: Finished difference Result 92793 states and 226902 transitions. [2022-01-18 14:19:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:19:09,112 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 32 [2022-01-18 14:19:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:09,320 INFO L225 Difference]: With dead ends: 92793 [2022-01-18 14:19:09,320 INFO L226 Difference]: Without dead ends: 92750 [2022-01-18 14:19:09,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:19:09,321 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 212 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:09,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 720 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92750 states. [2022-01-18 14:19:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92750 to 84575. [2022-01-18 14:19:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84575 states, 84574 states have (on average 2.4647527608957835) internal successors, (208454), 84574 states have internal predecessors, (208454), 0 states have call successors, (0), 0 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 14:19:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84575 states to 84575 states and 208454 transitions. [2022-01-18 14:19:11,365 INFO L78 Accepts]: Start accepts. Automaton has 84575 states and 208454 transitions. Word has length 32 [2022-01-18 14:19:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:11,365 INFO L470 AbstractCegarLoop]: Abstraction has 84575 states and 208454 transitions. [2022-01-18 14:19:11,365 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 14:19:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 84575 states and 208454 transitions. [2022-01-18 14:19:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:19:11,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:11,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:11,409 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 14:19:11,594 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,SelfDestructingSolverStorable39 [2022-01-18 14:19:11,594 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1012014960, now seen corresponding path program 32 times [2022-01-18 14:19:11,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:11,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698667873] [2022-01-18 14:19:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:11,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:11,715 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 14:19:11,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:11,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698667873] [2022-01-18 14:19:11,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698667873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:11,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476547363] [2022-01-18 14:19:11,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:11,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:11,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:11,716 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 14:19:11,717 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 14:19:11,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:19:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:11,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:12,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476547363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:12,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:12,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 21 [2022-01-18 14:19:12,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017946430] [2022-01-18 14:19:12,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:12,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:19:12,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:19:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:19:12,174 INFO L87 Difference]: Start difference. First operand 84575 states and 208454 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 14:19:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:13,026 INFO L93 Difference]: Finished difference Result 95832 states and 234336 transitions. [2022-01-18 14:19:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:19:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 32 [2022-01-18 14:19:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:13,333 INFO L225 Difference]: With dead ends: 95832 [2022-01-18 14:19:13,333 INFO L226 Difference]: Without dead ends: 95790 [2022-01-18 14:19:13,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:19:13,334 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 227 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:13,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 750 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95790 states. [2022-01-18 14:19:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95790 to 88530. [2022-01-18 14:19:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88530 states, 88529 states have (on average 2.4685809169876536) internal successors, (218541), 88529 states have internal predecessors, (218541), 0 states have call successors, (0), 0 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 14:19:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88530 states to 88530 states and 218541 transitions. [2022-01-18 14:19:15,378 INFO L78 Accepts]: Start accepts. Automaton has 88530 states and 218541 transitions. Word has length 32 [2022-01-18 14:19:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:15,378 INFO L470 AbstractCegarLoop]: Abstraction has 88530 states and 218541 transitions. [2022-01-18 14:19:15,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 14:19:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 88530 states and 218541 transitions. [2022-01-18 14:19:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:19:15,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:15,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:15,421 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 14:19:15,607 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,SelfDestructingSolverStorable40 [2022-01-18 14:19:15,608 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash 371496324, now seen corresponding path program 33 times [2022-01-18 14:19:15,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:15,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035729718] [2022-01-18 14:19:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:15,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:16,025 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 14:19:16,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035729718] [2022-01-18 14:19:16,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035729718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137687260] [2022-01-18 14:19:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:16,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:16,028 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 14:19:16,029 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 14:19:16,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:19:16,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:16,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:19:16,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:16,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:16,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137687260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:16,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:16,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 14:19:16,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845433800] [2022-01-18 14:19:16,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:16,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:19:16,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:16,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:19:16,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:19:16,539 INFO L87 Difference]: Start difference. First operand 88530 states and 218541 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 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 14:19:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:18,292 INFO L93 Difference]: Finished difference Result 120751 states and 294981 transitions. [2022-01-18 14:19:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 14:19:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:19:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:18,942 INFO L225 Difference]: With dead ends: 120751 [2022-01-18 14:19:18,942 INFO L226 Difference]: Without dead ends: 120710 [2022-01-18 14:19:18,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=480, Invalid=3060, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 14:19:18,943 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 334 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:18,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1644 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:19:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120710 states. [2022-01-18 14:19:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120710 to 106952. [2022-01-18 14:19:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106952 states, 106951 states have (on average 2.4723003992482537) internal successors, (264415), 106951 states have internal predecessors, (264415), 0 states have call successors, (0), 0 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 14:19:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106952 states to 106952 states and 264415 transitions. [2022-01-18 14:19:21,368 INFO L78 Accepts]: Start accepts. Automaton has 106952 states and 264415 transitions. Word has length 32 [2022-01-18 14:19:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:21,368 INFO L470 AbstractCegarLoop]: Abstraction has 106952 states and 264415 transitions. [2022-01-18 14:19:21,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 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 14:19:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 106952 states and 264415 transitions. [2022-01-18 14:19:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:19:21,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:21,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:21,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:21,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 14:19:21,611 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash -191983202, now seen corresponding path program 34 times [2022-01-18 14:19:21,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:21,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323439140] [2022-01-18 14:19:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:21,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:21,732 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 14:19:21,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:21,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323439140] [2022-01-18 14:19:21,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323439140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:21,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84594506] [2022-01-18 14:19:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:21,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:21,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:21,733 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 14:19:21,734 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 14:19:21,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:21,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:21,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:19:21,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:21,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:22,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84594506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:22,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:22,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 14:19:22,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841275237] [2022-01-18 14:19:22,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:22,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:19:22,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:22,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:19:22,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:19:22,182 INFO L87 Difference]: Start difference. First operand 106952 states and 264415 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:23,426 INFO L93 Difference]: Finished difference Result 113095 states and 278331 transitions. [2022-01-18 14:19:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:19:23,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:19:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:23,736 INFO L225 Difference]: With dead ends: 113095 [2022-01-18 14:19:23,736 INFO L226 Difference]: Without dead ends: 113078 [2022-01-18 14:19:23,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:19:23,737 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 133 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:23,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 592 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:23,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113078 states. [2022-01-18 14:19:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113078 to 107349. [2022-01-18 14:19:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107349 states, 107348 states have (on average 2.472146663188881) internal successors, (265380), 107348 states have internal predecessors, (265380), 0 states have call successors, (0), 0 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 14:19:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107349 states to 107349 states and 265380 transitions. [2022-01-18 14:19:26,246 INFO L78 Accepts]: Start accepts. Automaton has 107349 states and 265380 transitions. Word has length 32 [2022-01-18 14:19:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:26,246 INFO L470 AbstractCegarLoop]: Abstraction has 107349 states and 265380 transitions. [2022-01-18 14:19:26,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 107349 states and 265380 transitions. [2022-01-18 14:19:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 14:19:26,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:26,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:26,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:26,483 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,SelfDestructingSolverStorable42 [2022-01-18 14:19:26,483 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash -445666353, now seen corresponding path program 6 times [2022-01-18 14:19:26,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:26,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364051559] [2022-01-18 14:19:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:26,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:26,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:26,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364051559] [2022-01-18 14:19:26,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364051559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:26,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255833054] [2022-01-18 14:19:26,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:26,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:26,555 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 14:19:26,555 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 14:19:26,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 14:19:26,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:26,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:19:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:26,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:26,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255833054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:26,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:26,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-01-18 14:19:26,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459585383] [2022-01-18 14:19:26,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:26,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:19:26,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:26,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:19:26,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:19:26,817 INFO L87 Difference]: Start difference. First operand 107349 states and 265380 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 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 14:19:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:27,934 INFO L93 Difference]: Finished difference Result 114109 states and 280340 transitions. [2022-01-18 14:19:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:19:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 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 14:19:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:28,218 INFO L225 Difference]: With dead ends: 114109 [2022-01-18 14:19:28,219 INFO L226 Difference]: Without dead ends: 112943 [2022-01-18 14:19:28,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:19:28,219 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 280 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:28,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 645 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:19:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112943 states. [2022-01-18 14:19:30,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112943 to 107149. [2022-01-18 14:19:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107149 states, 107148 states have (on average 2.4727946391906523) internal successors, (264955), 107148 states have internal predecessors, (264955), 0 states have call successors, (0), 0 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 14:19:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107149 states to 107149 states and 264955 transitions. [2022-01-18 14:19:30,628 INFO L78 Accepts]: Start accepts. Automaton has 107149 states and 264955 transitions. Word has length 33 [2022-01-18 14:19:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:30,628 INFO L470 AbstractCegarLoop]: Abstraction has 107149 states and 264955 transitions. [2022-01-18 14:19:30,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 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 14:19:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 107149 states and 264955 transitions. [2022-01-18 14:19:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 14:19:30,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:30,676 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:30,693 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 14:19:30,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:30,877 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:30,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2052471971, now seen corresponding path program 35 times [2022-01-18 14:19:30,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:30,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572881970] [2022-01-18 14:19:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:30,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:19:31,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:31,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572881970] [2022-01-18 14:19:31,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572881970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:31,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784105849] [2022-01-18 14:19:31,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:19:31,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:31,089 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 14:19:31,091 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 14:19:31,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:19:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 14:19:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:31,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:31,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784105849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:31,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:31,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 37 [2022-01-18 14:19:31,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998244211] [2022-01-18 14:19:31,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 14:19:31,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 14:19:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 14:19:31,857 INFO L87 Difference]: Start difference. First operand 107149 states and 264955 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) 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 14:19:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:39,644 INFO L93 Difference]: Finished difference Result 164170 states and 399330 transitions. [2022-01-18 14:19:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-18 14:19:39,644 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) 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 34 [2022-01-18 14:19:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:40,095 INFO L225 Difference]: With dead ends: 164170 [2022-01-18 14:19:40,095 INFO L226 Difference]: Without dead ends: 164008 [2022-01-18 14:19:40,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11486 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3507, Invalid=30533, Unknown=0, NotChecked=0, Total=34040 [2022-01-18 14:19:40,097 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 815 mSDsluCounter, 5499 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 5244 SdHoareTripleChecker+Invalid, 4297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:40,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 5244 Invalid, 4297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4062 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 14:19:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164008 states. [2022-01-18 14:19:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164008 to 145288. [2022-01-18 14:19:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145288 states, 145287 states have (on average 2.463902482672228) internal successors, (357973), 145287 states have internal predecessors, (357973), 0 states have call successors, (0), 0 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 14:19:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145288 states to 145288 states and 357973 transitions. [2022-01-18 14:19:43,501 INFO L78 Accepts]: Start accepts. Automaton has 145288 states and 357973 transitions. Word has length 34 [2022-01-18 14:19:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:43,501 INFO L470 AbstractCegarLoop]: Abstraction has 145288 states and 357973 transitions. [2022-01-18 14:19:43,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) 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 14:19:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 145288 states and 357973 transitions. [2022-01-18 14:19:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:19:43,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:43,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:43,568 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 14:19:43,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:43,753 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash 176267436, now seen corresponding path program 36 times [2022-01-18 14:19:43,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:43,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595042339] [2022-01-18 14:19:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:43,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:43,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:43,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595042339] [2022-01-18 14:19:43,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595042339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:43,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549326937] [2022-01-18 14:19:43,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:43,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:43,793 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 14:19:43,797 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 14:19:43,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:19:43,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:19:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:43,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:43,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549326937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:43,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:43,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:19:43,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342200929] [2022-01-18 14:19:43,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:43,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:19:43,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:43,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:19:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:19:43,943 INFO L87 Difference]: Start difference. First operand 145288 states and 357973 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:44,980 INFO L93 Difference]: Finished difference Result 103418 states and 247086 transitions. [2022-01-18 14:19:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:44,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:19:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:45,217 INFO L225 Difference]: With dead ends: 103418 [2022-01-18 14:19:45,217 INFO L226 Difference]: Without dead ends: 103418 [2022-01-18 14:19:45,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:19:45,218 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 122 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:45,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 316 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:19:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103418 states. [2022-01-18 14:19:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103418 to 71860. [2022-01-18 14:19:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71860 states, 71859 states have (on average 2.410581833869105) internal successors, (173222), 71859 states have internal predecessors, (173222), 0 states have call successors, (0), 0 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 14:19:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71860 states to 71860 states and 173222 transitions. [2022-01-18 14:19:47,004 INFO L78 Accepts]: Start accepts. Automaton has 71860 states and 173222 transitions. Word has length 35 [2022-01-18 14:19:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 71860 states and 173222 transitions. [2022-01-18 14:19:47,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 71860 states and 173222 transitions. [2022-01-18 14:19:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:19:47,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:47,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:47,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 14:19:47,238 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,SelfDestructingSolverStorable45 [2022-01-18 14:19:47,238 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:47,238 INFO L85 PathProgramCache]: Analyzing trace with hash 624876916, now seen corresponding path program 37 times [2022-01-18 14:19:47,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:47,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205817888] [2022-01-18 14:19:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:47,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:47,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:47,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205817888] [2022-01-18 14:19:47,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205817888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:47,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808210793] [2022-01-18 14:19:47,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:47,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:47,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:47,273 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 14:19:47,274 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 14:19:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:47,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 14:19:47,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:47,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:47,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808210793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:47,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:47,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:19:47,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526042038] [2022-01-18 14:19:47,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:47,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:19:47,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:19:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:19:47,693 INFO L87 Difference]: Start difference. First operand 71860 states and 173222 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:48,003 INFO L93 Difference]: Finished difference Result 65581 states and 153600 transitions. [2022-01-18 14:19:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:48,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:19:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:48,132 INFO L225 Difference]: With dead ends: 65581 [2022-01-18 14:19:48,132 INFO L226 Difference]: Without dead ends: 65511 [2022-01-18 14:19:48,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:19:48,132 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 213 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:48,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 204 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:19:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65511 states. [2022-01-18 14:19:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65511 to 57103. [2022-01-18 14:19:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57103 states, 57102 states have (on average 2.3572904626808167) internal successors, (134606), 57102 states have internal predecessors, (134606), 0 states have call successors, (0), 0 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 14:19:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57103 states to 57103 states and 134606 transitions. [2022-01-18 14:19:49,264 INFO L78 Accepts]: Start accepts. Automaton has 57103 states and 134606 transitions. Word has length 35 [2022-01-18 14:19:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:49,264 INFO L470 AbstractCegarLoop]: Abstraction has 57103 states and 134606 transitions. [2022-01-18 14:19:49,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 57103 states and 134606 transitions. [2022-01-18 14:19:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:19:49,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:49,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:49,300 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 14:19:49,486 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,SelfDestructingSolverStorable46 [2022-01-18 14:19:49,486 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1359790695, now seen corresponding path program 38 times [2022-01-18 14:19:49,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:49,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071927276] [2022-01-18 14:19:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:49,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:49,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071927276] [2022-01-18 14:19:49,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071927276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129994309] [2022-01-18 14:19:49,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:49,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:49,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:49,514 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 14:19:49,515 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 14:19:49,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:49,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:49,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:19:49,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:49,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:49,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129994309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:49,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:49,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:19:49,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188213986] [2022-01-18 14:19:49,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:49,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:19:49,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:19:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:19:49,616 INFO L87 Difference]: Start difference. First operand 57103 states and 134606 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:49,922 INFO L93 Difference]: Finished difference Result 67716 states and 158828 transitions. [2022-01-18 14:19:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:19:49,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:19:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:50,086 INFO L225 Difference]: With dead ends: 67716 [2022-01-18 14:19:50,086 INFO L226 Difference]: Without dead ends: 67716 [2022-01-18 14:19:50,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:19:50,087 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 115 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:50,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 78 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:19:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67716 states. [2022-01-18 14:19:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67716 to 66000. [2022-01-18 14:19:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.363353990211973) internal successors, (155979), 65999 states have internal predecessors, (155979), 0 states have call successors, (0), 0 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 14:19:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155979 transitions. [2022-01-18 14:19:51,333 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155979 transitions. Word has length 35 [2022-01-18 14:19:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:51,333 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155979 transitions. [2022-01-18 14:19:51,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155979 transitions. [2022-01-18 14:19:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:19:51,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:51,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:51,372 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 14:19:51,555 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,SelfDestructingSolverStorable47 [2022-01-18 14:19:51,555 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -682736063, now seen corresponding path program 39 times [2022-01-18 14:19:51,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:51,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240311126] [2022-01-18 14:19:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:51,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:51,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240311126] [2022-01-18 14:19:51,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240311126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418431206] [2022-01-18 14:19:51,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:51,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:51,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:51,583 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 14:19:51,583 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 14:19:51,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:19:51,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:19:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:51,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:51,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418431206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:51,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:51,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:19:51,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516278949] [2022-01-18 14:19:51,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:51,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:19:51,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:19:51,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:19:51,933 INFO L87 Difference]: Start difference. First operand 66000 states and 155979 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:52,210 INFO L93 Difference]: Finished difference Result 68361 states and 159847 transitions. [2022-01-18 14:19:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:19:52,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:19:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:52,347 INFO L225 Difference]: With dead ends: 68361 [2022-01-18 14:19:52,348 INFO L226 Difference]: Without dead ends: 68358 [2022-01-18 14:19:52,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:52,348 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:52,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 93 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:19:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68358 states. [2022-01-18 14:19:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68358 to 66000. [2022-01-18 14:19:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.362596402975803) internal successors, (155929), 65999 states have internal predecessors, (155929), 0 states have call successors, (0), 0 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 14:19:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155929 transitions. [2022-01-18 14:19:53,464 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155929 transitions. Word has length 35 [2022-01-18 14:19:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:53,465 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155929 transitions. [2022-01-18 14:19:53,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155929 transitions. [2022-01-18 14:19:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:19:53,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:53,485 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:53,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:53,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:53,685 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1974658777, now seen corresponding path program 40 times [2022-01-18 14:19:53,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:53,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844447009] [2022-01-18 14:19:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:53,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:53,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:53,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844447009] [2022-01-18 14:19:53,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844447009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:53,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978339290] [2022-01-18 14:19:53,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:53,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:53,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:53,713 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 14:19:53,715 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 14:19:53,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:53,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:19:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:53,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:53,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978339290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:53,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:53,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-18 14:19:53,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547459484] [2022-01-18 14:19:53,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:53,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:19:53,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:19:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:19:53,848 INFO L87 Difference]: Start difference. First operand 66000 states and 155929 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:54,143 INFO L93 Difference]: Finished difference Result 68385 states and 159843 transitions. [2022-01-18 14:19:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:19:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:19:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:54,280 INFO L225 Difference]: With dead ends: 68385 [2022-01-18 14:19:54,280 INFO L226 Difference]: Without dead ends: 68373 [2022-01-18 14:19:54,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:19:54,281 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:54,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 106 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:19:54,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68373 states. [2022-01-18 14:19:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68373 to 66000. [2022-01-18 14:19:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.3606721313959302) internal successors, (155802), 65999 states have internal predecessors, (155802), 0 states have call successors, (0), 0 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 14:19:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155802 transitions. [2022-01-18 14:19:55,810 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155802 transitions. Word has length 35 [2022-01-18 14:19:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:55,810 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155802 transitions. [2022-01-18 14:19:55,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155802 transitions. [2022-01-18 14:19:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:19:55,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:55,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:55,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 14:19:56,032 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,SelfDestructingSolverStorable49 [2022-01-18 14:19:56,032 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash 919304957, now seen corresponding path program 41 times [2022-01-18 14:19:56,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138702780] [2022-01-18 14:19:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:56,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:56,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:56,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138702780] [2022-01-18 14:19:56,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138702780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:56,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942669482] [2022-01-18 14:19:56,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:19:56,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:56,066 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 14:19:56,068 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 14:19:56,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:19:56,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:19:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:56,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:56,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942669482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:56,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:56,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 14:19:56,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389072717] [2022-01-18 14:19:56,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:56,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:19:56,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:19:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:19:56,179 INFO L87 Difference]: Start difference. First operand 66000 states and 155802 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:56,465 INFO L93 Difference]: Finished difference Result 68349 states and 159650 transitions. [2022-01-18 14:19:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:19:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:19:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:56,600 INFO L225 Difference]: With dead ends: 68349 [2022-01-18 14:19:56,600 INFO L226 Difference]: Without dead ends: 68326 [2022-01-18 14:19:56,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:19:56,600 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:56,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 124 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:19:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68326 states. [2022-01-18 14:19:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68326 to 66018. [2022-01-18 14:19:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66018 states, 66017 states have (on average 2.3601799536483026) internal successors, (155812), 66017 states have internal predecessors, (155812), 0 states have call successors, (0), 0 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 14:19:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66018 states to 66018 states and 155812 transitions. [2022-01-18 14:19:57,903 INFO L78 Accepts]: Start accepts. Automaton has 66018 states and 155812 transitions. Word has length 35 [2022-01-18 14:19:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:57,903 INFO L470 AbstractCegarLoop]: Abstraction has 66018 states and 155812 transitions. [2022-01-18 14:19:57,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 66018 states and 155812 transitions. [2022-01-18 14:19:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:19:57,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:57,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:57,947 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 14:19:58,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:58,131 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077410, now seen corresponding path program 42 times [2022-01-18 14:19:58,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:58,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098254580] [2022-01-18 14:19:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:58,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:58,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:58,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098254580] [2022-01-18 14:19:58,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098254580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:58,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964948017] [2022-01-18 14:19:58,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:58,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:58,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:58,315 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 14:19:58,315 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 14:19:58,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:19:58,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:19:58,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:58,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:58,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964948017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:58,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:58,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:19:58,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072723127] [2022-01-18 14:19:58,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:58,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:19:58,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:58,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:19:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:19:58,957 INFO L87 Difference]: Start difference. First operand 66018 states and 155812 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:01,413 INFO L93 Difference]: Finished difference Result 80160 states and 188249 transitions. [2022-01-18 14:20:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 14:20:01,413 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:20:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:01,577 INFO L225 Difference]: With dead ends: 80160 [2022-01-18 14:20:01,577 INFO L226 Difference]: Without dead ends: 80143 [2022-01-18 14:20:01,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=536, Invalid=5164, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 14:20:01,578 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 470 mSDsluCounter, 2974 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:01,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 2724 Invalid, 2464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:20:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80143 states. [2022-01-18 14:20:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80143 to 68227. [2022-01-18 14:20:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68227 states, 68226 states have (on average 2.3634538152610443) internal successors, (161249), 68226 states have internal predecessors, (161249), 0 states have call successors, (0), 0 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 14:20:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68227 states to 68227 states and 161249 transitions. [2022-01-18 14:20:02,898 INFO L78 Accepts]: Start accepts. Automaton has 68227 states and 161249 transitions. Word has length 38 [2022-01-18 14:20:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:02,898 INFO L470 AbstractCegarLoop]: Abstraction has 68227 states and 161249 transitions. [2022-01-18 14:20:02,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 68227 states and 161249 transitions. [2022-01-18 14:20:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:02,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:02,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:02,941 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 14:20:03,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 14:20:03,127 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash 283993190, now seen corresponding path program 43 times [2022-01-18 14:20:03,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:03,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363201686] [2022-01-18 14:20:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:03,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:03,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:03,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363201686] [2022-01-18 14:20:03,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363201686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:03,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416013990] [2022-01-18 14:20:03,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:20:03,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:03,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:03,301 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 14:20:03,302 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 14:20:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:03,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:03,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:03,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416013990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:03,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:03,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:20:03,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265817427] [2022-01-18 14:20:03,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:03,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:20:03,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:03,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:20:03,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:03,913 INFO L87 Difference]: Start difference. First operand 68227 states and 161249 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:06,016 INFO L93 Difference]: Finished difference Result 78845 states and 185508 transitions. [2022-01-18 14:20:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 14:20:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:20:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:06,174 INFO L225 Difference]: With dead ends: 78845 [2022-01-18 14:20:06,174 INFO L226 Difference]: Without dead ends: 78828 [2022-01-18 14:20:06,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=557, Invalid=4845, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 14:20:06,175 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 425 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:06,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1778 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:20:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78828 states. [2022-01-18 14:20:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78828 to 69484. [2022-01-18 14:20:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69484 states, 69483 states have (on average 2.3646359541182735) internal successors, (164302), 69483 states have internal predecessors, (164302), 0 states have call successors, (0), 0 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 14:20:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69484 states to 69484 states and 164302 transitions. [2022-01-18 14:20:07,456 INFO L78 Accepts]: Start accepts. Automaton has 69484 states and 164302 transitions. Word has length 38 [2022-01-18 14:20:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:07,456 INFO L470 AbstractCegarLoop]: Abstraction has 69484 states and 164302 transitions. [2022-01-18 14:20:07,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 69484 states and 164302 transitions. [2022-01-18 14:20:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:07,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:07,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:07,497 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 14:20:07,683 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,SelfDestructingSolverStorable52 [2022-01-18 14:20:07,683 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2130240098, now seen corresponding path program 44 times [2022-01-18 14:20:07,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:07,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963088911] [2022-01-18 14:20:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:07,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:07,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:07,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963088911] [2022-01-18 14:20:07,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963088911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:07,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791548262] [2022-01-18 14:20:07,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:20:07,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:07,870 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 14:20:07,871 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 14:20:07,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:20:07,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:07,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:08,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:08,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791548262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:08,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:08,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:20:08,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041559529] [2022-01-18 14:20:08,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:08,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:20:08,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:20:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:08,739 INFO L87 Difference]: Start difference. First operand 69484 states and 164302 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:11,384 INFO L93 Difference]: Finished difference Result 80472 states and 189381 transitions. [2022-01-18 14:20:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 14:20:11,384 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:20:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:11,545 INFO L225 Difference]: With dead ends: 80472 [2022-01-18 14:20:11,545 INFO L226 Difference]: Without dead ends: 80455 [2022-01-18 14:20:11,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=798, Invalid=7758, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 14:20:11,547 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 493 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:11,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 2387 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:20:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80455 states. [2022-01-18 14:20:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80455 to 73196. [2022-01-18 14:20:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73196 states, 73195 states have (on average 2.3706127467723204) internal successors, (173517), 73195 states have internal predecessors, (173517), 0 states have call successors, (0), 0 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 14:20:13,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73196 states to 73196 states and 173517 transitions. [2022-01-18 14:20:13,035 INFO L78 Accepts]: Start accepts. Automaton has 73196 states and 173517 transitions. Word has length 38 [2022-01-18 14:20:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:13,035 INFO L470 AbstractCegarLoop]: Abstraction has 73196 states and 173517 transitions. [2022-01-18 14:20:13,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 73196 states and 173517 transitions. [2022-01-18 14:20:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:13,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:13,059 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:13,074 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 14:20:13,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:13,274 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash 726839142, now seen corresponding path program 45 times [2022-01-18 14:20:13,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:13,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204803201] [2022-01-18 14:20:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:13,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:13,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204803201] [2022-01-18 14:20:13,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204803201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268449583] [2022-01-18 14:20:13,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:20:13,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:13,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:13,432 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 14:20:13,435 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 14:20:13,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:20:13,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:13,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:20:14,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268449583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:14,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:14,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 33 [2022-01-18 14:20:14,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554109300] [2022-01-18 14:20:14,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:14,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 14:20:14,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 14:20:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:20:14,133 INFO L87 Difference]: Start difference. First operand 73196 states and 173517 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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 14:20:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:20,336 INFO L93 Difference]: Finished difference Result 104966 states and 245995 transitions. [2022-01-18 14:20:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-18 14:20:20,337 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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 38 [2022-01-18 14:20:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:20,578 INFO L225 Difference]: With dead ends: 104966 [2022-01-18 14:20:20,578 INFO L226 Difference]: Without dead ends: 104812 [2022-01-18 14:20:20,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9758 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2576, Invalid=26494, Unknown=0, NotChecked=0, Total=29070 [2022-01-18 14:20:20,580 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 885 mSDsluCounter, 3649 mSDsCounter, 0 mSdLazyCounter, 3264 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:20,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 3414 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 3264 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 14:20:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104812 states. [2022-01-18 14:20:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104812 to 80383. [2022-01-18 14:20:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80383 states, 80382 states have (on average 2.3753949889278694) internal successors, (190939), 80382 states have internal predecessors, (190939), 0 states have call successors, (0), 0 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 14:20:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80383 states to 80383 states and 190939 transitions. [2022-01-18 14:20:22,317 INFO L78 Accepts]: Start accepts. Automaton has 80383 states and 190939 transitions. Word has length 38 [2022-01-18 14:20:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:22,317 INFO L470 AbstractCegarLoop]: Abstraction has 80383 states and 190939 transitions. [2022-01-18 14:20:22,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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 14:20:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 80383 states and 190939 transitions. [2022-01-18 14:20:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:22,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:22,345 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:22,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:22,545 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,SelfDestructingSolverStorable54 [2022-01-18 14:20:22,545 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:22,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1924591970, now seen corresponding path program 46 times [2022-01-18 14:20:22,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:22,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545354782] [2022-01-18 14:20:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:22,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:22,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:22,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545354782] [2022-01-18 14:20:22,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545354782] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:22,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82126924] [2022-01-18 14:20:22,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:20:22,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:22,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:22,714 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 14:20:22,715 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 14:20:22,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:20:22,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:23,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:23,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82126924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:23,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:23,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:20:23,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873468798] [2022-01-18 14:20:23,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:23,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:20:23,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:23,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:20:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:23,329 INFO L87 Difference]: Start difference. First operand 80383 states and 190939 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 14:20:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:25,922 INFO L93 Difference]: Finished difference Result 97594 states and 230104 transitions. [2022-01-18 14:20:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 14:20:25,923 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 38 [2022-01-18 14:20:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:26,119 INFO L225 Difference]: With dead ends: 97594 [2022-01-18 14:20:26,119 INFO L226 Difference]: Without dead ends: 97527 [2022-01-18 14:20:26,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=611, Invalid=6195, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 14:20:26,120 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 371 mSDsluCounter, 2922 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2779 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:26,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 2779 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:20:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97527 states. [2022-01-18 14:20:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97527 to 84100. [2022-01-18 14:20:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84100 states, 84099 states have (on average 2.3742375057967395) internal successors, (199671), 84099 states have internal predecessors, (199671), 0 states have call successors, (0), 0 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 14:20:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84100 states to 84100 states and 199671 transitions. [2022-01-18 14:20:27,607 INFO L78 Accepts]: Start accepts. Automaton has 84100 states and 199671 transitions. Word has length 38 [2022-01-18 14:20:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:27,607 INFO L470 AbstractCegarLoop]: Abstraction has 84100 states and 199671 transitions. [2022-01-18 14:20:27,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 14:20:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 84100 states and 199671 transitions. [2022-01-18 14:20:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:27,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:27,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:27,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:27,841 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,SelfDestructingSolverStorable55 [2022-01-18 14:20:27,841 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:27,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:27,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1690483302, now seen corresponding path program 47 times [2022-01-18 14:20:27,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:27,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424231411] [2022-01-18 14:20:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:27,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:27,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424231411] [2022-01-18 14:20:27,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424231411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242024950] [2022-01-18 14:20:27,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:20:27,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:27,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:27,994 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 14:20:27,994 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 14:20:28,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:20:28,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:28,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:28,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:28,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:28,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242024950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:28,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:28,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 14:20:28,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062566318] [2022-01-18 14:20:28,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:28,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 14:20:28,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 14:20:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:20:28,645 INFO L87 Difference]: Start difference. First operand 84100 states and 199671 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:31,694 INFO L93 Difference]: Finished difference Result 105315 states and 248410 transitions. [2022-01-18 14:20:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 14:20:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:20:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:31,941 INFO L225 Difference]: With dead ends: 105315 [2022-01-18 14:20:31,941 INFO L226 Difference]: Without dead ends: 105242 [2022-01-18 14:20:31,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=656, Invalid=7000, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 14:20:31,942 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 446 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:31,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 2833 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:20:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105242 states. [2022-01-18 14:20:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105242 to 89668. [2022-01-18 14:20:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89668 states, 89667 states have (on average 2.3797383652848874) internal successors, (213384), 89667 states have internal predecessors, (213384), 0 states have call successors, (0), 0 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 14:20:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89668 states to 89668 states and 213384 transitions. [2022-01-18 14:20:33,865 INFO L78 Accepts]: Start accepts. Automaton has 89668 states and 213384 transitions. Word has length 38 [2022-01-18 14:20:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:33,866 INFO L470 AbstractCegarLoop]: Abstraction has 89668 states and 213384 transitions. [2022-01-18 14:20:33,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 89668 states and 213384 transitions. [2022-01-18 14:20:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:33,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:33,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:33,917 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 14:20:34,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:34,103 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:34,104 INFO L85 PathProgramCache]: Analyzing trace with hash -100519944, now seen corresponding path program 48 times [2022-01-18 14:20:34,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:34,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604443729] [2022-01-18 14:20:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:34,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:34,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604443729] [2022-01-18 14:20:34,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604443729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433661153] [2022-01-18 14:20:34,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:20:34,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:34,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:34,264 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 14:20:34,265 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 14:20:34,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 14:20:34,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:34,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433661153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:34,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:34,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:20:34,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933664609] [2022-01-18 14:20:34,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:34,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:20:34,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:20:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:34,867 INFO L87 Difference]: Start difference. First operand 89668 states and 213384 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:37,507 INFO L93 Difference]: Finished difference Result 105589 states and 250362 transitions. [2022-01-18 14:20:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 14:20:37,507 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:20:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:37,759 INFO L225 Difference]: With dead ends: 105589 [2022-01-18 14:20:37,759 INFO L226 Difference]: Without dead ends: 105572 [2022-01-18 14:20:37,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=650, Invalid=6156, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 14:20:37,760 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 461 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:37,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1995 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:20:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105572 states. [2022-01-18 14:20:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105572 to 92721. [2022-01-18 14:20:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92721 states, 92720 states have (on average 2.3839516824849007) internal successors, (221040), 92720 states have internal predecessors, (221040), 0 states have call successors, (0), 0 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 14:20:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92721 states to 92721 states and 221040 transitions. [2022-01-18 14:20:39,832 INFO L78 Accepts]: Start accepts. Automaton has 92721 states and 221040 transitions. Word has length 38 [2022-01-18 14:20:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:39,832 INFO L470 AbstractCegarLoop]: Abstraction has 92721 states and 221040 transitions. [2022-01-18 14:20:39,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 92721 states and 221040 transitions. [2022-01-18 14:20:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:39,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:39,867 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:39,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 14:20:40,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:40,068 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1095467792, now seen corresponding path program 49 times [2022-01-18 14:20:40,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:40,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464728396] [2022-01-18 14:20:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:40,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:40,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464728396] [2022-01-18 14:20:40,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464728396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792083235] [2022-01-18 14:20:40,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:20:40,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:40,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:40,231 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 14:20:40,232 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 14:20:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:40,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:40,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:40,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792083235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:40,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:40,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:20:40,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131034988] [2022-01-18 14:20:40,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:40,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:20:40,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:20:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:40,838 INFO L87 Difference]: Start difference. First operand 92721 states and 221040 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:42,646 INFO L93 Difference]: Finished difference Result 105951 states and 251639 transitions. [2022-01-18 14:20:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 14:20:42,647 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:20:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:42,904 INFO L225 Difference]: With dead ends: 105951 [2022-01-18 14:20:42,904 INFO L226 Difference]: Without dead ends: 105934 [2022-01-18 14:20:42,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=3524, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 14:20:42,905 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 302 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:42,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 2131 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:20:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105934 states. [2022-01-18 14:20:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105934 to 94088. [2022-01-18 14:20:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94088 states, 94087 states have (on average 2.384527086632585) internal successors, (224353), 94087 states have internal predecessors, (224353), 0 states have call successors, (0), 0 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 14:20:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94088 states to 94088 states and 224353 transitions. [2022-01-18 14:20:44,891 INFO L78 Accepts]: Start accepts. Automaton has 94088 states and 224353 transitions. Word has length 38 [2022-01-18 14:20:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:44,891 INFO L470 AbstractCegarLoop]: Abstraction has 94088 states and 224353 transitions. [2022-01-18 14:20:44,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 94088 states and 224353 transitions. [2022-01-18 14:20:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:44,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:44,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:44,942 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 14:20:45,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:45,128 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1318765496, now seen corresponding path program 50 times [2022-01-18 14:20:45,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762569257] [2022-01-18 14:20:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:45,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:45,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762569257] [2022-01-18 14:20:45,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762569257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167661812] [2022-01-18 14:20:45,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:20:45,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:45,301 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 14:20:45,302 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 14:20:45,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:20:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:45,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:45,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167661812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:45,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:45,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:20:45,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763583981] [2022-01-18 14:20:45,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:45,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:20:45,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:45,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:20:45,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:45,901 INFO L87 Difference]: Start difference. First operand 94088 states and 224353 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:48,564 INFO L93 Difference]: Finished difference Result 104357 states and 247663 transitions. [2022-01-18 14:20:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 14:20:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:20:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:48,807 INFO L225 Difference]: With dead ends: 104357 [2022-01-18 14:20:48,808 INFO L226 Difference]: Without dead ends: 104340 [2022-01-18 14:20:48,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=590, Invalid=6052, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 14:20:48,809 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 354 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:48,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 2185 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:20:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104340 states. [2022-01-18 14:20:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104340 to 96779. [2022-01-18 14:20:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96779 states, 96778 states have (on average 2.3871231064911447) internal successors, (231021), 96778 states have internal predecessors, (231021), 0 states have call successors, (0), 0 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 14:20:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96779 states to 96779 states and 231021 transitions. [2022-01-18 14:20:50,900 INFO L78 Accepts]: Start accepts. Automaton has 96779 states and 231021 transitions. Word has length 38 [2022-01-18 14:20:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:50,900 INFO L470 AbstractCegarLoop]: Abstraction has 96779 states and 231021 transitions. [2022-01-18 14:20:50,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 96779 states and 231021 transitions. [2022-01-18 14:20:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:20:50,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:50,939 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:50,954 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 14:20:51,139 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,SelfDestructingSolverStorable59 [2022-01-18 14:20:51,140 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1793009392, now seen corresponding path program 51 times [2022-01-18 14:20:51,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:51,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019658265] [2022-01-18 14:20:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:51,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:51,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:51,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019658265] [2022-01-18 14:20:51,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019658265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:51,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648467628] [2022-01-18 14:20:51,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:20:51,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:51,321 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:51,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 14:20:51,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:20:51,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:51,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:20:51,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:51,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:52,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648467628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:52,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:52,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2022-01-18 14:20:52,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892470950] [2022-01-18 14:20:52,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:52,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 14:20:52,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:52,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 14:20:52,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:20:52,079 INFO L87 Difference]: Start difference. First operand 96779 states and 231021 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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 14:21:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:01,121 INFO L93 Difference]: Finished difference Result 247727 states and 589278 transitions. [2022-01-18 14:21:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-18 14:21:01,122 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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 38 [2022-01-18 14:21:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:01,854 INFO L225 Difference]: With dead ends: 247727 [2022-01-18 14:21:01,854 INFO L226 Difference]: Without dead ends: 247520 [2022-01-18 14:21:01,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14609 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3852, Invalid=37968, Unknown=0, NotChecked=0, Total=41820 [2022-01-18 14:21:01,856 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 840 mSDsluCounter, 5338 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 5091 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:01,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 5091 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 4552 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 14:21:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247520 states. [2022-01-18 14:21:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247520 to 197497. [2022-01-18 14:21:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197497 states, 197496 states have (on average 2.411436180985944) internal successors, (476249), 197496 states have internal predecessors, (476249), 0 states have call successors, (0), 0 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 14:21:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197497 states to 197497 states and 476249 transitions. [2022-01-18 14:21:06,789 INFO L78 Accepts]: Start accepts. Automaton has 197497 states and 476249 transitions. Word has length 38 [2022-01-18 14:21:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:06,789 INFO L470 AbstractCegarLoop]: Abstraction has 197497 states and 476249 transitions. [2022-01-18 14:21:06,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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 14:21:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 197497 states and 476249 transitions. [2022-01-18 14:21:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:21:06,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:06,840 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:06,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:07,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-18 14:21:07,040 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:07,041 INFO L85 PathProgramCache]: Analyzing trace with hash 710954658, now seen corresponding path program 52 times [2022-01-18 14:21:07,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:07,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694178023] [2022-01-18 14:21:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:07,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:07,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:07,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694178023] [2022-01-18 14:21:07,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694178023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:07,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712322908] [2022-01-18 14:21:07,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:21:07,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:07,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:07,206 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:07,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 14:21:07,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:21:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:21:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:07,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:07,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712322908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:07,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:07,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:21:07,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018848740] [2022-01-18 14:21:07,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:07,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:21:07,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:07,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:21:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:21:07,837 INFO L87 Difference]: Start difference. First operand 197497 states and 476249 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:10,683 INFO L93 Difference]: Finished difference Result 222369 states and 534084 transitions. [2022-01-18 14:21:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 14:21:10,684 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:21:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:11,322 INFO L225 Difference]: With dead ends: 222369 [2022-01-18 14:21:11,322 INFO L226 Difference]: Without dead ends: 222352 [2022-01-18 14:21:11,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=434, Invalid=4258, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 14:21:11,323 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 380 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:11,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 1912 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222352 states. [2022-01-18 14:21:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222352 to 199729. [2022-01-18 14:21:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199729 states, 199728 states have (on average 2.412170551950653) internal successors, (481778), 199728 states have internal predecessors, (481778), 0 states have call successors, (0), 0 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 14:21:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199729 states to 199729 states and 481778 transitions. [2022-01-18 14:21:16,089 INFO L78 Accepts]: Start accepts. Automaton has 199729 states and 481778 transitions. Word has length 38 [2022-01-18 14:21:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:16,089 INFO L470 AbstractCegarLoop]: Abstraction has 199729 states and 481778 transitions. [2022-01-18 14:21:16,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 199729 states and 481778 transitions. [2022-01-18 14:21:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:21:16,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:16,146 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:16,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:16,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 14:21:16,346 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash 432482470, now seen corresponding path program 53 times [2022-01-18 14:21:16,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:16,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622212304] [2022-01-18 14:21:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:16,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:16,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622212304] [2022-01-18 14:21:16,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622212304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:16,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742294342] [2022-01-18 14:21:16,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:21:16,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:16,512 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:16,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 14:21:16,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:21:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:21:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:16,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:17,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742294342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:17,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:17,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 14:21:17,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481082380] [2022-01-18 14:21:17,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:17,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 14:21:17,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 14:21:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:21:17,381 INFO L87 Difference]: Start difference. First operand 199729 states and 481778 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:22,375 INFO L93 Difference]: Finished difference Result 250125 states and 598297 transitions. [2022-01-18 14:21:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 14:21:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:21:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:23,058 INFO L225 Difference]: With dead ends: 250125 [2022-01-18 14:21:23,059 INFO L226 Difference]: Without dead ends: 249693 [2022-01-18 14:21:23,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1466, Invalid=9664, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 14:21:23,059 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 719 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2679 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:23,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 2847 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2679 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 14:21:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249693 states. [2022-01-18 14:21:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249693 to 204883. [2022-01-18 14:21:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204883 states, 204882 states have (on average 2.410118995324138) internal successors, (493790), 204882 states have internal predecessors, (493790), 0 states have call successors, (0), 0 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 14:21:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204883 states to 204883 states and 493790 transitions. [2022-01-18 14:21:28,267 INFO L78 Accepts]: Start accepts. Automaton has 204883 states and 493790 transitions. Word has length 38 [2022-01-18 14:21:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:28,267 INFO L470 AbstractCegarLoop]: Abstraction has 204883 states and 493790 transitions. [2022-01-18 14:21:28,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 204883 states and 493790 transitions. [2022-01-18 14:21:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:21:28,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:28,336 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:28,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:28,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:28,544 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:28,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1005405586, now seen corresponding path program 54 times [2022-01-18 14:21:28,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:28,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766377336] [2022-01-18 14:21:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:28,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:28,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:28,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766377336] [2022-01-18 14:21:28,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766377336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:28,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288094625] [2022-01-18 14:21:28,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:21:28,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:28,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:28,721 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:28,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 14:21:28,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:21:28,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:28,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:21:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:29,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:29,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288094625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:29,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:29,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:21:29,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491221382] [2022-01-18 14:21:29,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:29,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:21:29,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:21:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:21:29,344 INFO L87 Difference]: Start difference. First operand 204883 states and 493790 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:32,166 INFO L93 Difference]: Finished difference Result 217189 states and 522887 transitions. [2022-01-18 14:21:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 14:21:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:21:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:32,770 INFO L225 Difference]: With dead ends: 217189 [2022-01-18 14:21:32,770 INFO L226 Difference]: Without dead ends: 217155 [2022-01-18 14:21:32,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 14:21:32,770 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 315 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:32,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1564 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217155 states. [2022-01-18 14:21:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217155 to 205752. [2022-01-18 14:21:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205752 states, 205751 states have (on average 2.4099761362034693) internal successors, (495855), 205751 states have internal predecessors, (495855), 0 states have call successors, (0), 0 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 14:21:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205752 states to 205752 states and 495855 transitions. [2022-01-18 14:21:37,198 INFO L78 Accepts]: Start accepts. Automaton has 205752 states and 495855 transitions. Word has length 38 [2022-01-18 14:21:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:37,198 INFO L470 AbstractCegarLoop]: Abstraction has 205752 states and 495855 transitions. [2022-01-18 14:21:37,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 205752 states and 495855 transitions. [2022-01-18 14:21:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:21:37,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:37,254 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:37,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:37,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:37,455 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:37,456 INFO L85 PathProgramCache]: Analyzing trace with hash -41761426, now seen corresponding path program 55 times [2022-01-18 14:21:37,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:37,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975756679] [2022-01-18 14:21:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:37,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:37,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:37,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975756679] [2022-01-18 14:21:37,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975756679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:37,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645559044] [2022-01-18 14:21:37,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:21:37,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:37,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:37,620 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:37,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 14:21:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:21:37,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:21:38,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:21:38,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645559044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:38,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:38,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 14:21:38,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908070426] [2022-01-18 14:21:38,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:38,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 14:21:38,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:38,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 14:21:38,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:21:38,814 INFO L87 Difference]: Start difference. First operand 205752 states and 495855 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:41,795 INFO L93 Difference]: Finished difference Result 243037 states and 582553 transitions. [2022-01-18 14:21:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 14:21:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:21:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:42,478 INFO L225 Difference]: With dead ends: 243037 [2022-01-18 14:21:42,478 INFO L226 Difference]: Without dead ends: 242968 [2022-01-18 14:21:42,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=452, Invalid=4660, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 14:21:42,479 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 374 mSDsluCounter, 2410 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:42,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2133 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:21:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242968 states. [2022-01-18 14:21:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242968 to 214523. [2022-01-18 14:21:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214523 states, 214522 states have (on average 2.411393703209927) internal successors, (517297), 214522 states have internal predecessors, (517297), 0 states have call successors, (0), 0 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 14:21:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214523 states to 214523 states and 517297 transitions. [2022-01-18 14:21:47,634 INFO L78 Accepts]: Start accepts. Automaton has 214523 states and 517297 transitions. Word has length 38 [2022-01-18 14:21:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:47,634 INFO L470 AbstractCegarLoop]: Abstraction has 214523 states and 517297 transitions. [2022-01-18 14:21:47,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 214523 states and 517297 transitions. [2022-01-18 14:21:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:21:47,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:47,692 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:47,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:47,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 14:21:47,892 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash 253122132, now seen corresponding path program 56 times [2022-01-18 14:21:47,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:47,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975255242] [2022-01-18 14:21:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:47,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:48,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:48,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975255242] [2022-01-18 14:21:48,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975255242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:48,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450042968] [2022-01-18 14:21:48,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:21:48,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:48,070 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:48,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 14:21:48,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:21:48,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:21:48,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:48,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:48,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450042968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:48,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:48,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:21:48,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239288125] [2022-01-18 14:21:48,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:48,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:21:48,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:48,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:21:48,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:21:48,683 INFO L87 Difference]: Start difference. First operand 214523 states and 517297 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:51,149 INFO L93 Difference]: Finished difference Result 238695 states and 573579 transitions. [2022-01-18 14:21:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 14:21:51,150 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:21:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:51,840 INFO L225 Difference]: With dead ends: 238695 [2022-01-18 14:21:51,840 INFO L226 Difference]: Without dead ends: 238678 [2022-01-18 14:21:51,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 14:21:51,841 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 210 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:51,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1664 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238678 states. [2022-01-18 14:21:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238678 to 214859. [2022-01-18 14:21:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214859 states, 214858 states have (on average 2.4113879864840966) internal successors, (518106), 214858 states have internal predecessors, (518106), 0 states have call successors, (0), 0 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 14:21:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214859 states to 214859 states and 518106 transitions. [2022-01-18 14:21:57,012 INFO L78 Accepts]: Start accepts. Automaton has 214859 states and 518106 transitions. Word has length 38 [2022-01-18 14:21:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 214859 states and 518106 transitions. [2022-01-18 14:21:57,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 214859 states and 518106 transitions. [2022-01-18 14:21:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:21:57,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:57,068 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:57,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:57,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 14:21:57,283 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1725520592, now seen corresponding path program 57 times [2022-01-18 14:21:57,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:57,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079734935] [2022-01-18 14:21:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:57,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:57,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:57,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079734935] [2022-01-18 14:21:57,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079734935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:57,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328117045] [2022-01-18 14:21:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:21:57,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:57,477 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:57,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 14:21:57,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:21:57,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:57,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:21:57,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:57,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:58,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328117045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:58,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:58,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:21:58,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859799229] [2022-01-18 14:21:58,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:58,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:21:58,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:21:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:21:58,106 INFO L87 Difference]: Start difference. First operand 214859 states and 518106 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:01,296 INFO L93 Difference]: Finished difference Result 219835 states and 529343 transitions. [2022-01-18 14:22:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 14:22:01,296 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:22:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:01,962 INFO L225 Difference]: With dead ends: 219835 [2022-01-18 14:22:01,963 INFO L226 Difference]: Without dead ends: 219791 [2022-01-18 14:22:01,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=535, Invalid=5015, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 14:22:01,963 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 391 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:01,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 2059 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:22:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219791 states. [2022-01-18 14:22:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219791 to 216583. [2022-01-18 14:22:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216583 states, 216582 states have (on average 2.4118116925690964) internal successors, (522355), 216582 states have internal predecessors, (522355), 0 states have call successors, (0), 0 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 14:22:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216583 states to 216583 states and 522355 transitions. [2022-01-18 14:22:07,137 INFO L78 Accepts]: Start accepts. Automaton has 216583 states and 522355 transitions. Word has length 38 [2022-01-18 14:22:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:07,137 INFO L470 AbstractCegarLoop]: Abstraction has 216583 states and 522355 transitions. [2022-01-18 14:22:07,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 216583 states and 522355 transitions. [2022-01-18 14:22:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:22:07,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:07,189 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:07,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:07,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:07,390 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash -925910520, now seen corresponding path program 58 times [2022-01-18 14:22:07,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:07,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696460403] [2022-01-18 14:22:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:07,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:07,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:07,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696460403] [2022-01-18 14:22:07,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696460403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:07,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104921973] [2022-01-18 14:22:07,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:22:07,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:07,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:07,561 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:07,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 14:22:07,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:22:07,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:07,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:22:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:07,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:08,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104921973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:08,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:08,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:22:08,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439060907] [2022-01-18 14:22:08,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:08,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:22:08,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:22:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:22:08,178 INFO L87 Difference]: Start difference. First operand 216583 states and 522355 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 14:22:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:11,137 INFO L93 Difference]: Finished difference Result 221841 states and 533914 transitions. [2022-01-18 14:22:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 14:22:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 38 [2022-01-18 14:22:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:11,738 INFO L225 Difference]: With dead ends: 221841 [2022-01-18 14:22:11,738 INFO L226 Difference]: Without dead ends: 221758 [2022-01-18 14:22:11,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=485, Invalid=4485, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 14:22:11,739 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 401 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:11,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 1989 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:22:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221758 states. [2022-01-18 14:22:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221758 to 219330. [2022-01-18 14:22:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219330 states, 219329 states have (on average 2.410378928459073) internal successors, (528666), 219329 states have internal predecessors, (528666), 0 states have call successors, (0), 0 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 14:22:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219330 states to 219330 states and 528666 transitions. [2022-01-18 14:22:17,021 INFO L78 Accepts]: Start accepts. Automaton has 219330 states and 528666 transitions. Word has length 38 [2022-01-18 14:22:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:17,021 INFO L470 AbstractCegarLoop]: Abstraction has 219330 states and 528666 transitions. [2022-01-18 14:22:17,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 14:22:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 219330 states and 528666 transitions. [2022-01-18 14:22:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:22:17,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:17,080 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:17,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:17,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 14:22:17,280 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:17,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1421707574, now seen corresponding path program 59 times [2022-01-18 14:22:17,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:17,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233924182] [2022-01-18 14:22:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:17,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:17,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233924182] [2022-01-18 14:22:17,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233924182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:17,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837933644] [2022-01-18 14:22:17,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:22:17,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:17,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:17,464 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:17,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 14:22:17,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:22:17,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:17,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:22:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:17,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:18,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837933644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:18,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:18,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 14:22:18,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282101735] [2022-01-18 14:22:18,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:18,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 14:22:18,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 14:22:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:22:18,096 INFO L87 Difference]: Start difference. First operand 219330 states and 528666 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:21,090 INFO L93 Difference]: Finished difference Result 226504 states and 544989 transitions. [2022-01-18 14:22:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 14:22:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:22:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:21,740 INFO L225 Difference]: With dead ends: 226504 [2022-01-18 14:22:21,740 INFO L226 Difference]: Without dead ends: 226451 [2022-01-18 14:22:21,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 14:22:21,740 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 395 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:21,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1723 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1911 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:22:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226451 states. [2022-01-18 14:22:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226451 to 223614. [2022-01-18 14:22:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223614 states, 223613 states have (on average 2.409850947842925) internal successors, (538874), 223613 states have internal predecessors, (538874), 0 states have call successors, (0), 0 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 14:22:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223614 states to 223614 states and 538874 transitions. [2022-01-18 14:22:26,753 INFO L78 Accepts]: Start accepts. Automaton has 223614 states and 538874 transitions. Word has length 38 [2022-01-18 14:22:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:26,753 INFO L470 AbstractCegarLoop]: Abstraction has 223614 states and 538874 transitions. [2022-01-18 14:22:26,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 223614 states and 538874 transitions. [2022-01-18 14:22:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:22:26,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:26,805 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:26,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:27,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 14:22:27,006 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -198181364, now seen corresponding path program 60 times [2022-01-18 14:22:27,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877573867] [2022-01-18 14:22:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:27,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:27,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:27,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877573867] [2022-01-18 14:22:27,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877573867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:27,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005993477] [2022-01-18 14:22:27,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:22:27,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:27,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:27,191 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:27,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 14:22:27,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:22:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:22:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:27,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:27,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005993477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:27,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:27,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 14:22:27,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685454738] [2022-01-18 14:22:27,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:27,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 14:22:27,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 14:22:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:22:27,792 INFO L87 Difference]: Start difference. First operand 223614 states and 538874 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:30,447 INFO L93 Difference]: Finished difference Result 240724 states and 577550 transitions. [2022-01-18 14:22:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 14:22:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:22:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:31,192 INFO L225 Difference]: With dead ends: 240724 [2022-01-18 14:22:31,192 INFO L226 Difference]: Without dead ends: 240666 [2022-01-18 14:22:31,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 14:22:31,192 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 322 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:31,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 2362 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:22:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240666 states. [2022-01-18 14:22:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240666 to 225813. [2022-01-18 14:22:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225813 states, 225812 states have (on average 2.4096505057304305) internal successors, (544128), 225812 states have internal predecessors, (544128), 0 states have call successors, (0), 0 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 14:22:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225813 states to 225813 states and 544128 transitions. [2022-01-18 14:22:36,420 INFO L78 Accepts]: Start accepts. Automaton has 225813 states and 544128 transitions. Word has length 38 [2022-01-18 14:22:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:36,420 INFO L470 AbstractCegarLoop]: Abstraction has 225813 states and 544128 transitions. [2022-01-18 14:22:36,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 225813 states and 544128 transitions. [2022-01-18 14:22:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:22:36,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:36,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:36,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:36,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 14:22:36,671 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1452833468, now seen corresponding path program 61 times [2022-01-18 14:22:36,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:36,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755172222] [2022-01-18 14:22:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:36,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:36,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755172222] [2022-01-18 14:22:36,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755172222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452419416] [2022-01-18 14:22:36,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:22:36,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:36,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:36,828 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:36,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 14:22:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:22:36,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:37,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:37,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452419416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:37,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:37,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-18 14:22:37,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559775841] [2022-01-18 14:22:37,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:37,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 14:22:37,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:37,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 14:22:37,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:22:37,463 INFO L87 Difference]: Start difference. First operand 225813 states and 544128 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 14:22:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:40,386 INFO L93 Difference]: Finished difference Result 253210 states and 606499 transitions. [2022-01-18 14:22:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 14:22:40,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 38 [2022-01-18 14:22:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:41,074 INFO L225 Difference]: With dead ends: 253210 [2022-01-18 14:22:41,074 INFO L226 Difference]: Without dead ends: 253105 [2022-01-18 14:22:41,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=402, Invalid=3630, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 14:22:41,074 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 386 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:41,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2142 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:22:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253105 states. [2022-01-18 14:22:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253105 to 232783. [2022-01-18 14:22:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232783 states, 232782 states have (on average 2.4071491782010637) internal successors, (560341), 232782 states have internal predecessors, (560341), 0 states have call successors, (0), 0 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 14:22:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232783 states to 232783 states and 560341 transitions. [2022-01-18 14:22:46,269 INFO L78 Accepts]: Start accepts. Automaton has 232783 states and 560341 transitions. Word has length 38 [2022-01-18 14:22:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:46,269 INFO L470 AbstractCegarLoop]: Abstraction has 232783 states and 560341 transitions. [2022-01-18 14:22:46,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 14:22:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 232783 states and 560341 transitions. [2022-01-18 14:22:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:22:46,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:46,324 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:46,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:46,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-01-18 14:22:46,525 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 679972510, now seen corresponding path program 62 times [2022-01-18 14:22:46,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:46,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147827572] [2022-01-18 14:22:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:46,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:46,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147827572] [2022-01-18 14:22:46,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147827572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519222607] [2022-01-18 14:22:46,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:22:46,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:46,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:46,681 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:46,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 14:22:46,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:22:46,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:22:46,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:47,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:47,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519222607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:47,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:47,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-18 14:22:47,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524569646] [2022-01-18 14:22:47,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:47,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 14:22:47,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 14:22:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:22:47,265 INFO L87 Difference]: Start difference. First operand 232783 states and 560341 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 14:22:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:50,282 INFO L93 Difference]: Finished difference Result 257718 states and 616884 transitions. [2022-01-18 14:22:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 14:22:50,282 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 38 [2022-01-18 14:22:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:51,485 INFO L225 Difference]: With dead ends: 257718 [2022-01-18 14:22:51,485 INFO L226 Difference]: Without dead ends: 257623 [2022-01-18 14:22:51,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=3537, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 14:22:51,486 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 362 mSDsluCounter, 3066 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:51,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2801 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 14:22:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257623 states. [2022-01-18 14:22:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257623 to 238428. [2022-01-18 14:22:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238428 states, 238427 states have (on average 2.406254325223234) internal successors, (573716), 238427 states have internal predecessors, (573716), 0 states have call successors, (0), 0 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 14:22:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238428 states to 238428 states and 573716 transitions. [2022-01-18 14:22:57,023 INFO L78 Accepts]: Start accepts. Automaton has 238428 states and 573716 transitions. Word has length 38 [2022-01-18 14:22:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:57,023 INFO L470 AbstractCegarLoop]: Abstraction has 238428 states and 573716 transitions. [2022-01-18 14:22:57,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 14:22:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 238428 states and 573716 transitions. [2022-01-18 14:22:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:22:57,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:57,102 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:57,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:57,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:57,319 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 442535240, now seen corresponding path program 63 times [2022-01-18 14:22:57,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:57,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103310598] [2022-01-18 14:22:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:57,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:57,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103310598] [2022-01-18 14:22:57,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103310598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999713276] [2022-01-18 14:22:57,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:22:57,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:57,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:57,491 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:57,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 14:22:57,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:22:57,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:22:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:57,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:58,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999713276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:58,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:58,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 14:22:58,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181000924] [2022-01-18 14:22:58,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:58,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 14:22:58,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 14:22:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:22:58,144 INFO L87 Difference]: Start difference. First operand 238428 states and 573716 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:01,723 INFO L93 Difference]: Finished difference Result 247178 states and 593496 transitions. [2022-01-18 14:23:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 14:23:01,724 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:23:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:02,370 INFO L225 Difference]: With dead ends: 247178 [2022-01-18 14:23:02,370 INFO L226 Difference]: Without dead ends: 247092 [2022-01-18 14:23:02,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=649, Invalid=6157, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 14:23:02,370 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 600 mSDsluCounter, 2932 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:02,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 2475 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2383 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:23:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247092 states. [2022-01-18 14:23:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247092 to 242549. [2022-01-18 14:23:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242549 states, 242548 states have (on average 2.4067318633837425) internal successors, (583748), 242548 states have internal predecessors, (583748), 0 states have call successors, (0), 0 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 14:23:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242549 states to 242549 states and 583748 transitions. [2022-01-18 14:23:07,779 INFO L78 Accepts]: Start accepts. Automaton has 242549 states and 583748 transitions. Word has length 38 [2022-01-18 14:23:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:07,780 INFO L470 AbstractCegarLoop]: Abstraction has 242549 states and 583748 transitions. [2022-01-18 14:23:07,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 242549 states and 583748 transitions. [2022-01-18 14:23:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:23:07,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:07,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:07,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:08,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:08,038 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1936505558, now seen corresponding path program 64 times [2022-01-18 14:23:08,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:08,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82042290] [2022-01-18 14:23:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:08,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:08,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:08,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82042290] [2022-01-18 14:23:08,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82042290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:08,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026005046] [2022-01-18 14:23:08,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:23:08,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:08,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:08,221 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:08,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 14:23:08,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:23:08,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:23:08,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:08,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:08,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026005046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:08,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:08,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-18 14:23:08,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785784434] [2022-01-18 14:23:08,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:08,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 14:23:08,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:08,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 14:23:08,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:23:08,804 INFO L87 Difference]: Start difference. First operand 242549 states and 583748 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:11,311 INFO L93 Difference]: Finished difference Result 259471 states and 621961 transitions. [2022-01-18 14:23:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 14:23:11,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:23:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:12,054 INFO L225 Difference]: With dead ends: 259471 [2022-01-18 14:23:12,054 INFO L226 Difference]: Without dead ends: 259425 [2022-01-18 14:23:12,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=297, Invalid=2565, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 14:23:12,054 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 272 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:12,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1824 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:23:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259425 states. [2022-01-18 14:23:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259425 to 244014. [2022-01-18 14:23:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244014 states, 244013 states have (on average 2.4064332638015187) internal successors, (587201), 244013 states have internal predecessors, (587201), 0 states have call successors, (0), 0 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 14:23:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244014 states to 244014 states and 587201 transitions. [2022-01-18 14:23:17,624 INFO L78 Accepts]: Start accepts. Automaton has 244014 states and 587201 transitions. Word has length 38 [2022-01-18 14:23:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:17,625 INFO L470 AbstractCegarLoop]: Abstraction has 244014 states and 587201 transitions. [2022-01-18 14:23:17,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 244014 states and 587201 transitions. [2022-01-18 14:23:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:23:17,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:17,688 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:17,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:17,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:17,888 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash 423917610, now seen corresponding path program 65 times [2022-01-18 14:23:17,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:17,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675523042] [2022-01-18 14:23:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:17,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:18,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:18,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675523042] [2022-01-18 14:23:18,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675523042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:18,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177631660] [2022-01-18 14:23:18,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:23:18,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:18,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:18,049 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:18,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 14:23:18,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:23:18,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:23:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:19,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:19,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177631660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:19,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:19,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 14:23:19,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296178644] [2022-01-18 14:23:19,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:19,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 14:23:19,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:19,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 14:23:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:23:19,359 INFO L87 Difference]: Start difference. First operand 244014 states and 587201 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:22,095 INFO L93 Difference]: Finished difference Result 266371 states and 638012 transitions. [2022-01-18 14:23:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 14:23:22,095 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:23:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:22,799 INFO L225 Difference]: With dead ends: 266371 [2022-01-18 14:23:22,800 INFO L226 Difference]: Without dead ends: 266301 [2022-01-18 14:23:22,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=3397, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 14:23:22,800 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 353 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:22,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 1639 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:23:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266301 states. [2022-01-18 14:23:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266301 to 247320. [2022-01-18 14:23:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247320 states, 247319 states have (on average 2.4065437754479033) internal successors, (595184), 247319 states have internal predecessors, (595184), 0 states have call successors, (0), 0 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 14:23:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247320 states to 247320 states and 595184 transitions. [2022-01-18 14:23:28,839 INFO L78 Accepts]: Start accepts. Automaton has 247320 states and 595184 transitions. Word has length 38 [2022-01-18 14:23:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:28,839 INFO L470 AbstractCegarLoop]: Abstraction has 247320 states and 595184 transitions. [2022-01-18 14:23:28,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 247320 states and 595184 transitions. [2022-01-18 14:23:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:23:28,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:28,899 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:28,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:29,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 14:23:29,124 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:29,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:29,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048424, now seen corresponding path program 66 times [2022-01-18 14:23:29,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:29,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947504304] [2022-01-18 14:23:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:29,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:29,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947504304] [2022-01-18 14:23:29,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947504304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485959276] [2022-01-18 14:23:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:23:29,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:29,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:29,375 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:29,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 14:23:29,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:23:29,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:23:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:29,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:30,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485959276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:30,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:30,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:23:30,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862186808] [2022-01-18 14:23:30,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:30,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:23:30,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:30,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:23:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:23:30,158 INFO L87 Difference]: Start difference. First operand 247320 states and 595184 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:32,789 INFO L93 Difference]: Finished difference Result 263347 states and 631500 transitions. [2022-01-18 14:23:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 14:23:32,789 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:23:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:33,555 INFO L225 Difference]: With dead ends: 263347 [2022-01-18 14:23:33,556 INFO L226 Difference]: Without dead ends: 263330 [2022-01-18 14:23:33,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 14:23:33,556 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 225 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:33,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1646 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:23:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263330 states. [2022-01-18 14:23:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263330 to 248311. [2022-01-18 14:23:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248311 states, 248310 states have (on average 2.4066328379847772) internal successors, (597591), 248310 states have internal predecessors, (597591), 0 states have call successors, (0), 0 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 14:23:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248311 states to 248311 states and 597591 transitions. [2022-01-18 14:23:39,035 INFO L78 Accepts]: Start accepts. Automaton has 248311 states and 597591 transitions. Word has length 38 [2022-01-18 14:23:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:39,035 INFO L470 AbstractCegarLoop]: Abstraction has 248311 states and 597591 transitions. [2022-01-18 14:23:39,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 248311 states and 597591 transitions. [2022-01-18 14:23:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:23:39,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:39,095 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:39,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:39,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:39,295 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1838109140, now seen corresponding path program 67 times [2022-01-18 14:23:39,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464296172] [2022-01-18 14:23:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:39,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:39,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:39,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464296172] [2022-01-18 14:23:39,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464296172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:39,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610947471] [2022-01-18 14:23:39,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:23:39,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:39,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:39,451 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:39,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 14:23:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:23:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:39,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:40,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610947471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:40,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:40,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:23:40,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339528711] [2022-01-18 14:23:40,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:40,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:23:40,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:23:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:23:40,064 INFO L87 Difference]: Start difference. First operand 248311 states and 597591 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:43,677 INFO L93 Difference]: Finished difference Result 263955 states and 634548 transitions. [2022-01-18 14:23:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 14:23:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:23:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:44,858 INFO L225 Difference]: With dead ends: 263955 [2022-01-18 14:23:44,858 INFO L226 Difference]: Without dead ends: 263904 [2022-01-18 14:23:44,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=595, Invalid=5885, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 14:23:44,859 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 374 mSDsluCounter, 2600 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:44,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2341 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 14:23:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263904 states. [2022-01-18 14:23:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263904 to 249476. [2022-01-18 14:23:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249476 states, 249475 states have (on average 2.406609880749574) internal successors, (600389), 249475 states have internal predecessors, (600389), 0 states have call successors, (0), 0 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 14:23:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249476 states to 249476 states and 600389 transitions. [2022-01-18 14:23:50,429 INFO L78 Accepts]: Start accepts. Automaton has 249476 states and 600389 transitions. Word has length 38 [2022-01-18 14:23:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:50,429 INFO L470 AbstractCegarLoop]: Abstraction has 249476 states and 600389 transitions. [2022-01-18 14:23:50,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 249476 states and 600389 transitions. [2022-01-18 14:23:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:23:50,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:50,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:50,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:50,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:50,687 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:50,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1493213996, now seen corresponding path program 68 times [2022-01-18 14:23:50,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:50,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074651066] [2022-01-18 14:23:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:50,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:50,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:50,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074651066] [2022-01-18 14:23:50,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074651066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:50,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83247200] [2022-01-18 14:23:50,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:23:50,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:50,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:50,854 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:50,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 14:23:50,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:23:50,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:23:50,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:51,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:51,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83247200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:51,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:51,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 14:23:51,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280648487] [2022-01-18 14:23:51,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:51,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 14:23:51,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 14:23:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:23:51,491 INFO L87 Difference]: Start difference. First operand 249476 states and 600389 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:54,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:54,895 INFO L93 Difference]: Finished difference Result 293252 states and 702115 transitions. [2022-01-18 14:23:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 14:23:54,895 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:23:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:56,178 INFO L225 Difference]: With dead ends: 293252 [2022-01-18 14:23:56,178 INFO L226 Difference]: Without dead ends: 293183 [2022-01-18 14:23:56,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=510, Invalid=5342, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 14:23:56,179 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 397 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:56,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 2283 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:23:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293183 states. [2022-01-18 14:24:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293183 to 259027. [2022-01-18 14:24:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259027 states, 259026 states have (on average 2.407912719186491) internal successors, (623712), 259026 states have internal predecessors, (623712), 0 states have call successors, (0), 0 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 14:24:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259027 states to 259027 states and 623712 transitions. [2022-01-18 14:24:02,008 INFO L78 Accepts]: Start accepts. Automaton has 259027 states and 623712 transitions. Word has length 38 [2022-01-18 14:24:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:02,008 INFO L470 AbstractCegarLoop]: Abstraction has 259027 states and 623712 transitions. [2022-01-18 14:24:02,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 259027 states and 623712 transitions. [2022-01-18 14:24:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:24:02,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:02,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:02,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:02,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 14:24:02,273 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1198330438, now seen corresponding path program 69 times [2022-01-18 14:24:02,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:02,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448501908] [2022-01-18 14:24:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:02,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:02,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:02,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448501908] [2022-01-18 14:24:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448501908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:02,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458162255] [2022-01-18 14:24:02,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:24:02,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:02,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:02,437 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:02,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 14:24:02,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:24:02,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:02,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:24:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:02,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:03,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458162255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:03,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:03,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 14:24:03,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564677527] [2022-01-18 14:24:03,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:03,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:24:03,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:24:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:24:03,071 INFO L87 Difference]: Start difference. First operand 259027 states and 623712 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:05,950 INFO L93 Difference]: Finished difference Result 289168 states and 693821 transitions. [2022-01-18 14:24:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 14:24:05,950 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:24:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:07,228 INFO L225 Difference]: With dead ends: 289168 [2022-01-18 14:24:07,228 INFO L226 Difference]: Without dead ends: 289151 [2022-01-18 14:24:07,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=350, Invalid=3682, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 14:24:07,229 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 287 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:07,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1699 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:24:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289151 states. [2022-01-18 14:24:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289151 to 260145. [2022-01-18 14:24:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260145 states, 260144 states have (on average 2.407966357094532) internal successors, (626418), 260144 states have internal predecessors, (626418), 0 states have call successors, (0), 0 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 14:24:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260145 states to 260145 states and 626418 transitions. [2022-01-18 14:24:13,060 INFO L78 Accepts]: Start accepts. Automaton has 260145 states and 626418 transitions. Word has length 38 [2022-01-18 14:24:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:13,060 INFO L470 AbstractCegarLoop]: Abstraction has 260145 states and 626418 transitions. [2022-01-18 14:24:13,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 260145 states and 626418 transitions. [2022-01-18 14:24:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:24:13,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:13,122 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:13,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:13,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 14:24:13,322 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1192238897, now seen corresponding path program 7 times [2022-01-18 14:24:13,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:13,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778985873] [2022-01-18 14:24:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:13,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:24:13,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:13,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778985873] [2022-01-18 14:24:13,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778985873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:13,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768851148] [2022-01-18 14:24:13,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:24:13,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:13,351 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:13,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 14:24:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:13,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:24:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:13,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:13,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768851148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:13,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:13,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 11 [2022-01-18 14:24:13,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095024574] [2022-01-18 14:24:13,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:13,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:24:13,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:24:13,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:24:13,504 INFO L87 Difference]: Start difference. First operand 260145 states and 626418 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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 14:24:15,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:15,467 INFO L93 Difference]: Finished difference Result 321184 states and 775584 transitions. [2022-01-18 14:24:15,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:24:15,468 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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 39 [2022-01-18 14:24:15,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:16,376 INFO L225 Difference]: With dead ends: 321184 [2022-01-18 14:24:16,376 INFO L226 Difference]: Without dead ends: 320377 [2022-01-18 14:24:16,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:24:16,376 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 131 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:16,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 335 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:24:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320377 states. [2022-01-18 14:24:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320377 to 285108. [2022-01-18 14:24:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285108 states, 285107 states have (on average 2.4088429957875466) internal successors, (686778), 285107 states have internal predecessors, (686778), 0 states have call successors, (0), 0 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 14:24:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285108 states to 285108 states and 686778 transitions. [2022-01-18 14:24:22,914 INFO L78 Accepts]: Start accepts. Automaton has 285108 states and 686778 transitions. Word has length 39 [2022-01-18 14:24:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:22,914 INFO L470 AbstractCegarLoop]: Abstraction has 285108 states and 686778 transitions. [2022-01-18 14:24:22,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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 14:24:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 285108 states and 686778 transitions. [2022-01-18 14:24:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:24:22,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:22,976 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:22,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:23,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:23,177 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1351846617, now seen corresponding path program 8 times [2022-01-18 14:24:23,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:23,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489910568] [2022-01-18 14:24:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:23,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:23,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:23,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489910568] [2022-01-18 14:24:23,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489910568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:23,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294546511] [2022-01-18 14:24:23,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:24:23,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:23,209 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:23,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 14:24:23,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:24:23,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:23,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:24:23,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:24:23,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:24:23,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294546511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:23,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:23,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-01-18 14:24:23,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99603210] [2022-01-18 14:24:23,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:23,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:24:23,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:24:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:24:23,322 INFO L87 Difference]: Start difference. First operand 285108 states and 686778 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 14:24:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:25,168 INFO L93 Difference]: Finished difference Result 287926 states and 691391 transitions. [2022-01-18 14:24:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:24:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 39 [2022-01-18 14:24:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:26,028 INFO L225 Difference]: With dead ends: 287926 [2022-01-18 14:24:26,028 INFO L226 Difference]: Without dead ends: 287920 [2022-01-18 14:24:26,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:24:26,029 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 73 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:26,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 212 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:24:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287920 states. [2022-01-18 14:24:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287920 to 285072. [2022-01-18 14:24:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285072 states, 285071 states have (on average 2.408557868039892) internal successors, (686610), 285071 states have internal predecessors, (686610), 0 states have call successors, (0), 0 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 14:24:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285072 states to 285072 states and 686610 transitions. [2022-01-18 14:24:32,662 INFO L78 Accepts]: Start accepts. Automaton has 285072 states and 686610 transitions. Word has length 39 [2022-01-18 14:24:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:32,663 INFO L470 AbstractCegarLoop]: Abstraction has 285072 states and 686610 transitions. [2022-01-18 14:24:32,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 14:24:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 285072 states and 686610 transitions. [2022-01-18 14:24:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:24:32,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:32,726 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:32,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:32,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:32,926 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:32,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash -735468407, now seen corresponding path program 9 times [2022-01-18 14:24:32,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:32,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648483091] [2022-01-18 14:24:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:32,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:32,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648483091] [2022-01-18 14:24:32,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648483091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981478752] [2022-01-18 14:24:32,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:24:32,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:32,958 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:32,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 14:24:32,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:24:32,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:32,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:24:32,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:33,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981478752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:33,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:33,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-01-18 14:24:33,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077283344] [2022-01-18 14:24:33,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:33,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:24:33,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:33,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:24:33,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:24:33,081 INFO L87 Difference]: Start difference. First operand 285072 states and 686610 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:35,621 INFO L93 Difference]: Finished difference Result 349072 states and 840084 transitions. [2022-01-18 14:24:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:24:35,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:24:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:36,696 INFO L225 Difference]: With dead ends: 349072 [2022-01-18 14:24:36,697 INFO L226 Difference]: Without dead ends: 348327 [2022-01-18 14:24:36,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:36,697 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 191 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:36,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 249 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:24:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348327 states. [2022-01-18 14:24:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348327 to 286675. [2022-01-18 14:24:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286675 states, 286674 states have (on average 2.4018013492678096) internal successors, (688534), 286674 states have internal predecessors, (688534), 0 states have call successors, (0), 0 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 14:24:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286675 states to 286675 states and 688534 transitions. [2022-01-18 14:24:44,515 INFO L78 Accepts]: Start accepts. Automaton has 286675 states and 688534 transitions. Word has length 39 [2022-01-18 14:24:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:44,516 INFO L470 AbstractCegarLoop]: Abstraction has 286675 states and 688534 transitions. [2022-01-18 14:24:44,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 286675 states and 688534 transitions. [2022-01-18 14:24:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:24:44,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:44,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:44,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:44,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-01-18 14:24:44,774 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1946601264, now seen corresponding path program 70 times [2022-01-18 14:24:44,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:44,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622912001] [2022-01-18 14:24:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:44,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:44,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:44,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622912001] [2022-01-18 14:24:44,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622912001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:44,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105579294] [2022-01-18 14:24:44,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:24:44,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:44,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:44,804 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:44,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 14:24:44,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:24:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:44,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:24:44,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:44,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:44,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105579294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:44,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:44,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 14:24:44,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773534407] [2022-01-18 14:24:44,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:44,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:24:44,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:44,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:24:44,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:24:44,920 INFO L87 Difference]: Start difference. First operand 286675 states and 688534 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:46,939 INFO L93 Difference]: Finished difference Result 339005 states and 814007 transitions. [2022-01-18 14:24:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:24:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:24:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:47,987 INFO L225 Difference]: With dead ends: 339005 [2022-01-18 14:24:47,987 INFO L226 Difference]: Without dead ends: 338883 [2022-01-18 14:24:47,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:24:47,988 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 187 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:47,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 118 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:24:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338883 states. [2022-01-18 14:24:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338883 to 337181. [2022-01-18 14:24:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337181 states, 337180 states have (on average 2.3982917136247703) internal successors, (808656), 337180 states have internal predecessors, (808656), 0 states have call successors, (0), 0 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 14:24:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337181 states to 337181 states and 808656 transitions. [2022-01-18 14:24:56,139 INFO L78 Accepts]: Start accepts. Automaton has 337181 states and 808656 transitions. Word has length 39 [2022-01-18 14:24:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:56,139 INFO L470 AbstractCegarLoop]: Abstraction has 337181 states and 808656 transitions. [2022-01-18 14:24:56,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 337181 states and 808656 transitions. [2022-01-18 14:24:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:24:56,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:56,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:56,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:56,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:56,400 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash -185359280, now seen corresponding path program 71 times [2022-01-18 14:24:56,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:56,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979718088] [2022-01-18 14:24:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:56,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:56,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:56,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979718088] [2022-01-18 14:24:56,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979718088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:56,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700345013] [2022-01-18 14:24:56,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:24:56,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:56,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:56,427 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:56,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 14:24:56,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:24:56,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:56,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:24:56,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:24:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:24:56,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700345013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:56,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:56,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:24:56,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767266437] [2022-01-18 14:24:56,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:56,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:24:56,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:56,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:24:56,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:24:56,545 INFO L87 Difference]: Start difference. First operand 337181 states and 808656 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:58,507 INFO L93 Difference]: Finished difference Result 338000 states and 806990 transitions. [2022-01-18 14:24:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:24:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:24:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:59,551 INFO L225 Difference]: With dead ends: 338000 [2022-01-18 14:24:59,552 INFO L226 Difference]: Without dead ends: 337997 [2022-01-18 14:24:59,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:24:59,552 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 117 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:59,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 96 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:25:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337997 states. [2022-01-18 14:25:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337997 to 290870. [2022-01-18 14:25:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290870 states, 290869 states have (on average 2.39994292963499) internal successors, (698069), 290869 states have internal predecessors, (698069), 0 states have call successors, (0), 0 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 14:25:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290870 states to 290870 states and 698069 transitions. [2022-01-18 14:25:06,647 INFO L78 Accepts]: Start accepts. Automaton has 290870 states and 698069 transitions. Word has length 39 [2022-01-18 14:25:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:06,647 INFO L470 AbstractCegarLoop]: Abstraction has 290870 states and 698069 transitions. [2022-01-18 14:25:06,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 290870 states and 698069 transitions. [2022-01-18 14:25:07,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:25:07,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:07,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:07,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 14:25:07,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:07,584 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:07,584 INFO L85 PathProgramCache]: Analyzing trace with hash 815477842, now seen corresponding path program 72 times [2022-01-18 14:25:07,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:07,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386353659] [2022-01-18 14:25:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:07,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:07,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386353659] [2022-01-18 14:25:07,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386353659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796448936] [2022-01-18 14:25:07,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:25:07,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:07,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:07,604 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:07,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 14:25:07,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:25:07,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:07,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:25:07,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:07,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:07,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796448936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:07,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:07,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:25:07,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064563789] [2022-01-18 14:25:07,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:07,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:25:07,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:07,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:25:07,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:25:07,716 INFO L87 Difference]: Start difference. First operand 290870 states and 698069 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 14:25:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:09,672 INFO L93 Difference]: Finished difference Result 353721 states and 845549 transitions. [2022-01-18 14:25:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:25:09,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:25:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:10,662 INFO L225 Difference]: With dead ends: 353721 [2022-01-18 14:25:10,662 INFO L226 Difference]: Without dead ends: 353705 [2022-01-18 14:25:10,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:25:10,663 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:10,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 114 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:25:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353705 states. [2022-01-18 14:25:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353705 to 352361. [2022-01-18 14:25:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352361 states, 352360 states have (on average 2.391792484958565) internal successors, (842772), 352360 states have internal predecessors, (842772), 0 states have call successors, (0), 0 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 14:25:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352361 states to 352361 states and 842772 transitions. [2022-01-18 14:25:18,909 INFO L78 Accepts]: Start accepts. Automaton has 352361 states and 842772 transitions. Word has length 39 [2022-01-18 14:25:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:18,910 INFO L470 AbstractCegarLoop]: Abstraction has 352361 states and 842772 transitions. [2022-01-18 14:25:18,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 14:25:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 352361 states and 842772 transitions. [2022-01-18 14:25:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:25:18,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:18,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:18,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:19,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-01-18 14:25:19,171 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash 410110102, now seen corresponding path program 73 times [2022-01-18 14:25:19,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:19,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199110324] [2022-01-18 14:25:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:19,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:25:19,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199110324] [2022-01-18 14:25:19,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199110324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142522780] [2022-01-18 14:25:19,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:25:19,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:19,194 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:19,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 14:25:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:19,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:25:19,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:25:19,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:25:19,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142522780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:19,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:19,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:25:19,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654105581] [2022-01-18 14:25:19,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:19,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:25:19,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:25:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:25:19,318 INFO L87 Difference]: Start difference. First operand 352361 states and 842772 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 14:25:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:21,456 INFO L93 Difference]: Finished difference Result 362182 states and 862751 transitions. [2022-01-18 14:25:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:25:21,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:25:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:22,584 INFO L225 Difference]: With dead ends: 362182 [2022-01-18 14:25:22,584 INFO L226 Difference]: Without dead ends: 362179 [2022-01-18 14:25:22,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:25:22,585 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 93 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:22,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 119 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:25:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362179 states. [2022-01-18 14:25:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362179 to 357027. [2022-01-18 14:25:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357027 states, 357026 states have (on average 2.387635634379569) internal successors, (852448), 357026 states have internal predecessors, (852448), 0 states have call successors, (0), 0 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 14:25:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357027 states to 357027 states and 852448 transitions. [2022-01-18 14:25:31,147 INFO L78 Accepts]: Start accepts. Automaton has 357027 states and 852448 transitions. Word has length 39 [2022-01-18 14:25:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:31,147 INFO L470 AbstractCegarLoop]: Abstraction has 357027 states and 852448 transitions. [2022-01-18 14:25:31,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 14:25:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 357027 states and 852448 transitions. [2022-01-18 14:25:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:25:31,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:31,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:31,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:31,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:31,414 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:31,415 INFO L85 PathProgramCache]: Analyzing trace with hash 875424144, now seen corresponding path program 74 times [2022-01-18 14:25:31,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:31,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372090221] [2022-01-18 14:25:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:31,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:31,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:31,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372090221] [2022-01-18 14:25:31,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372090221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:31,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305983400] [2022-01-18 14:25:31,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:25:31,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:31,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:31,441 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:31,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 14:25:31,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:25:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:25:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:25:31,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:25:31,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305983400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:31,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:31,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:25:31,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513858692] [2022-01-18 14:25:31,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:31,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:25:31,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:31,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:25:31,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:25:31,580 INFO L87 Difference]: Start difference. First operand 357027 states and 852448 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 14:25:33,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:33,775 INFO L93 Difference]: Finished difference Result 358971 states and 849352 transitions. [2022-01-18 14:25:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:25:33,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:25:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:35,308 INFO L225 Difference]: With dead ends: 358971 [2022-01-18 14:25:35,308 INFO L226 Difference]: Without dead ends: 358968 [2022-01-18 14:25:35,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:25:35,308 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:35,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 112 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:25:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358968 states. [2022-01-18 14:25:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358968 to 340334. [2022-01-18 14:25:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340334 states, 340333 states have (on average 2.3787702044762042) internal successors, (809574), 340333 states have internal predecessors, (809574), 0 states have call successors, (0), 0 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 14:25:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340334 states to 340334 states and 809574 transitions. [2022-01-18 14:25:44,326 INFO L78 Accepts]: Start accepts. Automaton has 340334 states and 809574 transitions. Word has length 39 [2022-01-18 14:25:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:44,327 INFO L470 AbstractCegarLoop]: Abstraction has 340334 states and 809574 transitions. [2022-01-18 14:25:44,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 14:25:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 340334 states and 809574 transitions. [2022-01-18 14:25:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:25:44,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:44,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:44,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:44,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:44,605 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1935502256, now seen corresponding path program 75 times [2022-01-18 14:25:44,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:44,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961043701] [2022-01-18 14:25:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:44,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:44,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:44,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961043701] [2022-01-18 14:25:44,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961043701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:44,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88615973] [2022-01-18 14:25:44,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:25:44,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:44,635 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:44,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 14:25:44,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:25:44,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:44,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:25:44,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:44,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88615973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:44,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:44,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:25:44,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470502568] [2022-01-18 14:25:44,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:25:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:25:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:25:44,790 INFO L87 Difference]: Start difference. First operand 340334 states and 809574 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:46,846 INFO L93 Difference]: Finished difference Result 341420 states and 811356 transitions. [2022-01-18 14:25:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:25:46,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:25:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:47,895 INFO L225 Difference]: With dead ends: 341420 [2022-01-18 14:25:47,895 INFO L226 Difference]: Without dead ends: 341358 [2022-01-18 14:25:47,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:47,895 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:47,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 102 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:25:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341358 states. [2022-01-18 14:25:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341358 to 340312. [2022-01-18 14:25:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340312 states, 340311 states have (on average 2.374683745162513) internal successors, (808131), 340311 states have internal predecessors, (808131), 0 states have call successors, (0), 0 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 14:25:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340312 states to 340312 states and 808131 transitions. [2022-01-18 14:25:55,961 INFO L78 Accepts]: Start accepts. Automaton has 340312 states and 808131 transitions. Word has length 39 [2022-01-18 14:25:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:55,962 INFO L470 AbstractCegarLoop]: Abstraction has 340312 states and 808131 transitions. [2022-01-18 14:25:55,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 340312 states and 808131 transitions. [2022-01-18 14:25:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:25:56,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:56,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:56,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:56,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 14:25:56,233 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:56,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1358420656, now seen corresponding path program 76 times [2022-01-18 14:25:56,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:56,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994316201] [2022-01-18 14:25:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:56,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:56,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994316201] [2022-01-18 14:25:56,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994316201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762530515] [2022-01-18 14:25:56,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:25:56,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:56,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:56,258 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:56,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 14:25:56,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:25:56,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:56,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:25:56,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:25:56,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:25:56,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762530515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:56,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:56,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:25:56,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531200324] [2022-01-18 14:25:56,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:56,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:25:56,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:25:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:25:56,369 INFO L87 Difference]: Start difference. First operand 340312 states and 808131 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:58,463 INFO L93 Difference]: Finished difference Result 350854 states and 832315 transitions. [2022-01-18 14:25:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:25:58,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:25:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:59,497 INFO L225 Difference]: With dead ends: 350854 [2022-01-18 14:25:59,497 INFO L226 Difference]: Without dead ends: 350838 [2022-01-18 14:25:59,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:25:59,497 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:59,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 126 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:25:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350838 states. [2022-01-18 14:26:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350838 to 350557. [2022-01-18 14:26:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350557 states, 350556 states have (on average 2.372434076153311) internal successors, (831671), 350556 states have internal predecessors, (831671), 0 states have call successors, (0), 0 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 14:26:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350557 states to 350557 states and 831671 transitions. [2022-01-18 14:26:07,747 INFO L78 Accepts]: Start accepts. Automaton has 350557 states and 831671 transitions. Word has length 39 [2022-01-18 14:26:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:07,747 INFO L470 AbstractCegarLoop]: Abstraction has 350557 states and 831671 transitions. [2022-01-18 14:26:07,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 350557 states and 831671 transitions. [2022-01-18 14:26:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:26:07,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:07,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:07,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:08,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:08,014 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1763788396, now seen corresponding path program 77 times [2022-01-18 14:26:08,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:08,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111212555] [2022-01-18 14:26:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:08,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:08,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:08,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111212555] [2022-01-18 14:26:08,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111212555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:08,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109049409] [2022-01-18 14:26:08,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:26:08,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:08,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:08,043 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:08,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 14:26:08,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:26:08,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:26:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:26:08,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:26:08,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109049409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:08,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:08,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:26:08,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571862287] [2022-01-18 14:26:08,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:08,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:26:08,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:26:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:26:08,164 INFO L87 Difference]: Start difference. First operand 350557 states and 831671 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:10,147 INFO L93 Difference]: Finished difference Result 356211 states and 843397 transitions. [2022-01-18 14:26:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:26:10,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:26:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:11,257 INFO L225 Difference]: With dead ends: 356211 [2022-01-18 14:26:11,257 INFO L226 Difference]: Without dead ends: 356208 [2022-01-18 14:26:11,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:26:11,258 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:11,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 115 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:26:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356208 states. [2022-01-18 14:26:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356208 to 352212. [2022-01-18 14:26:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352212 states, 352211 states have (on average 2.371021915840221) internal successors, (835100), 352211 states have internal predecessors, (835100), 0 states have call successors, (0), 0 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 14:26:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352212 states to 352212 states and 835100 transitions. [2022-01-18 14:26:19,650 INFO L78 Accepts]: Start accepts. Automaton has 352212 states and 835100 transitions. Word has length 39 [2022-01-18 14:26:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:19,651 INFO L470 AbstractCegarLoop]: Abstraction has 352212 states and 835100 transitions. [2022-01-18 14:26:19,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 352212 states and 835100 transitions. [2022-01-18 14:26:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:26:19,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:19,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:19,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:19,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:19,935 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1298474354, now seen corresponding path program 78 times [2022-01-18 14:26:19,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:19,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13869273] [2022-01-18 14:26:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:19,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:26:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13869273] [2022-01-18 14:26:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13869273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098948404] [2022-01-18 14:26:19,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:26:19,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:19,957 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:19,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 14:26:19,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 14:26:19,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:19,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:26:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:26:20,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:26:20,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098948404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:20,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:20,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-18 14:26:20,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213733557] [2022-01-18 14:26:20,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:20,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:26:20,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:20,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:26:20,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:26:20,067 INFO L87 Difference]: Start difference. First operand 352212 states and 835100 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:22,314 INFO L93 Difference]: Finished difference Result 359965 states and 850571 transitions. [2022-01-18 14:26:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:26:22,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:26:22,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:23,959 INFO L225 Difference]: With dead ends: 359965 [2022-01-18 14:26:23,959 INFO L226 Difference]: Without dead ends: 359953 [2022-01-18 14:26:23,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:26:23,960 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:23,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 120 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:26:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359953 states. [2022-01-18 14:26:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359953 to 357309. [2022-01-18 14:26:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357309 states, 357308 states have (on average 2.364495057485419) internal successors, (844853), 357308 states have internal predecessors, (844853), 0 states have call successors, (0), 0 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 14:26:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357309 states to 357309 states and 844853 transitions. [2022-01-18 14:26:32,072 INFO L78 Accepts]: Start accepts. Automaton has 357309 states and 844853 transitions. Word has length 39 [2022-01-18 14:26:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:32,072 INFO L470 AbstractCegarLoop]: Abstraction has 357309 states and 844853 transitions. [2022-01-18 14:26:32,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 357309 states and 844853 transitions. [2022-01-18 14:26:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 14:26:32,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:32,143 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:32,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:32,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:32,344 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1663842512, now seen corresponding path program 79 times [2022-01-18 14:26:32,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:32,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548080430] [2022-01-18 14:26:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:32,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:32,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:32,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548080430] [2022-01-18 14:26:32,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548080430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:32,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115191819] [2022-01-18 14:26:32,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:26:32,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:32,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:32,371 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:32,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 14:26:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:26:32,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:32,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:32,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115191819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:32,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:32,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 14:26:32,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982546574] [2022-01-18 14:26:32,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:32,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:26:32,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:26:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:26:32,493 INFO L87 Difference]: Start difference. First operand 357309 states and 844853 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:34,511 INFO L93 Difference]: Finished difference Result 357767 states and 843492 transitions. [2022-01-18 14:26:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:26:34,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 14:26:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:36,071 INFO L225 Difference]: With dead ends: 357767 [2022-01-18 14:26:36,072 INFO L226 Difference]: Without dead ends: 357755 [2022-01-18 14:26:36,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:26:36,072 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 84 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:36,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 142 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:26:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357755 states. [2022-01-18 14:26:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357755 to 350533. [2022-01-18 14:26:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350533 states, 350532 states have (on average 2.362486163888033) internal successors, (828127), 350532 states have internal predecessors, (828127), 0 states have call successors, (0), 0 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 14:26:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350533 states to 350533 states and 828127 transitions. [2022-01-18 14:26:44,373 INFO L78 Accepts]: Start accepts. Automaton has 350533 states and 828127 transitions. Word has length 39 [2022-01-18 14:26:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:44,374 INFO L470 AbstractCegarLoop]: Abstraction has 350533 states and 828127 transitions. [2022-01-18 14:26:44,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 350533 states and 828127 transitions. [2022-01-18 14:26:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:26:44,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:44,447 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:44,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:44,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-01-18 14:26:44,648 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash -82315980, now seen corresponding path program 80 times [2022-01-18 14:26:44,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:44,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952225401] [2022-01-18 14:26:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:44,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:44,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:44,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952225401] [2022-01-18 14:26:44,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952225401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:44,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478941330] [2022-01-18 14:26:44,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:26:44,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:44,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:44,697 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:44,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 14:26:44,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:26:44,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:26:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:44,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:44,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478941330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:44,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:44,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-01-18 14:26:44,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343201156] [2022-01-18 14:26:44,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:44,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:26:44,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:44,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:26:44,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:26:44,856 INFO L87 Difference]: Start difference. First operand 350533 states and 828127 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:46,028 INFO L93 Difference]: Finished difference Result 257099 states and 593352 transitions. [2022-01-18 14:26:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:26:46,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:26:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:47,266 INFO L225 Difference]: With dead ends: 257099 [2022-01-18 14:26:47,266 INFO L226 Difference]: Without dead ends: 257099 [2022-01-18 14:26:47,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:26:47,266 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 216 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:47,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 466 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:26:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257099 states. [2022-01-18 14:26:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257099 to 150344. [2022-01-18 14:26:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150344 states, 150343 states have (on average 2.301171321577992) internal successors, (345965), 150343 states have internal predecessors, (345965), 0 states have call successors, (0), 0 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 14:26:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150344 states to 150344 states and 345965 transitions. [2022-01-18 14:26:51,364 INFO L78 Accepts]: Start accepts. Automaton has 150344 states and 345965 transitions. Word has length 41 [2022-01-18 14:26:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:51,365 INFO L470 AbstractCegarLoop]: Abstraction has 150344 states and 345965 transitions. [2022-01-18 14:26:51,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 150344 states and 345965 transitions. [2022-01-18 14:26:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:26:51,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:51,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:51,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:51,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:51,623 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:51,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:51,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1495522452, now seen corresponding path program 81 times [2022-01-18 14:26:51,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:51,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018698419] [2022-01-18 14:26:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:51,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:51,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018698419] [2022-01-18 14:26:51,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018698419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634358833] [2022-01-18 14:26:51,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:26:51,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:51,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:51,668 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:51,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 14:26:51,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:26:51,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:26:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:51,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:51,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634358833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:51,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:51,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-01-18 14:26:51,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114067888] [2022-01-18 14:26:51,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:51,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:26:51,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:26:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:26:51,812 INFO L87 Difference]: Start difference. First operand 150344 states and 345965 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 14:26:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:52,489 INFO L93 Difference]: Finished difference Result 144159 states and 325044 transitions. [2022-01-18 14:26:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:26:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 41 [2022-01-18 14:26:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:53,370 INFO L225 Difference]: With dead ends: 144159 [2022-01-18 14:26:53,371 INFO L226 Difference]: Without dead ends: 144001 [2022-01-18 14:26:53,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:26:53,371 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 494 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:53,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 354 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:26:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144001 states. [2022-01-18 14:26:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144001 to 131031. [2022-01-18 14:26:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131031 states, 131030 states have (on average 2.254582919941998) internal successors, (295418), 131030 states have internal predecessors, (295418), 0 states have call successors, (0), 0 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 14:26:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131031 states to 131031 states and 295418 transitions. [2022-01-18 14:26:56,049 INFO L78 Accepts]: Start accepts. Automaton has 131031 states and 295418 transitions. Word has length 41 [2022-01-18 14:26:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:56,049 INFO L470 AbstractCegarLoop]: Abstraction has 131031 states and 295418 transitions. [2022-01-18 14:26:56,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 14:26:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 131031 states and 295418 transitions. [2022-01-18 14:26:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:26:56,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:56,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:56,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:56,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:56,301 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1555357781, now seen corresponding path program 82 times [2022-01-18 14:26:56,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:56,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169622064] [2022-01-18 14:26:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:56,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:56,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169622064] [2022-01-18 14:26:56,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169622064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409514301] [2022-01-18 14:26:56,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:26:56,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:56,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:56,448 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:56,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 14:26:56,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:26:56,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:26:56,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:26:56,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:26:57,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409514301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:57,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:57,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-01-18 14:26:57,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294429382] [2022-01-18 14:26:57,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:57,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:26:57,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:26:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:26:57,007 INFO L87 Difference]: Start difference. First operand 131031 states and 295418 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 14:26:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:59,268 INFO L93 Difference]: Finished difference Result 155842 states and 350763 transitions. [2022-01-18 14:26:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 14:26:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:26:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:59,632 INFO L225 Difference]: With dead ends: 155842 [2022-01-18 14:26:59,632 INFO L226 Difference]: Without dead ends: 155767 [2022-01-18 14:26:59,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=494, Invalid=4336, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 14:26:59,633 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 506 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:59,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1454 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:26:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155767 states. [2022-01-18 14:27:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155767 to 134288. [2022-01-18 14:27:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134288 states, 134287 states have (on average 2.2562198872563988) internal successors, (302981), 134287 states have internal predecessors, (302981), 0 states have call successors, (0), 0 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 14:27:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134288 states to 134288 states and 302981 transitions. [2022-01-18 14:27:02,363 INFO L78 Accepts]: Start accepts. Automaton has 134288 states and 302981 transitions. Word has length 42 [2022-01-18 14:27:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:02,364 INFO L470 AbstractCegarLoop]: Abstraction has 134288 states and 302981 transitions. [2022-01-18 14:27:02,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 14:27:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 134288 states and 302981 transitions. [2022-01-18 14:27:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:27:02,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:02,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:02,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:02,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:02,616 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:02,617 INFO L85 PathProgramCache]: Analyzing trace with hash 80278243, now seen corresponding path program 83 times [2022-01-18 14:27:02,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:02,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469844468] [2022-01-18 14:27:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:02,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:02,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469844468] [2022-01-18 14:27:02,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469844468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868643491] [2022-01-18 14:27:02,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:27:02,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:02,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:02,758 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:02,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 14:27:02,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:27:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:27:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:03,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:03,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868643491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:03,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:03,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-01-18 14:27:03,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792041640] [2022-01-18 14:27:03,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:03,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:27:03,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:27:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:27:03,322 INFO L87 Difference]: Start difference. First operand 134288 states and 302981 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 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 14:27:05,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:05,421 INFO L93 Difference]: Finished difference Result 163784 states and 369053 transitions. [2022-01-18 14:27:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 14:27:05,421 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 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 42 [2022-01-18 14:27:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:05,786 INFO L225 Difference]: With dead ends: 163784 [2022-01-18 14:27:05,786 INFO L226 Difference]: Without dead ends: 163678 [2022-01-18 14:27:05,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=429, Invalid=3231, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 14:27:05,786 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 373 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:05,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1743 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:27:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163678 states. [2022-01-18 14:27:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163678 to 142342. [2022-01-18 14:27:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142342 states, 142341 states have (on average 2.2571360324853695) internal successors, (321283), 142341 states have internal predecessors, (321283), 0 states have call successors, (0), 0 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 14:27:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142342 states to 142342 states and 321283 transitions. [2022-01-18 14:27:09,056 INFO L78 Accepts]: Start accepts. Automaton has 142342 states and 321283 transitions. Word has length 42 [2022-01-18 14:27:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:09,056 INFO L470 AbstractCegarLoop]: Abstraction has 142342 states and 321283 transitions. [2022-01-18 14:27:09,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 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 14:27:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 142342 states and 321283 transitions. [2022-01-18 14:27:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:27:09,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:09,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:09,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:09,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:09,311 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:09,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2095685291, now seen corresponding path program 84 times [2022-01-18 14:27:09,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:09,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626948820] [2022-01-18 14:27:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:09,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:09,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:09,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626948820] [2022-01-18 14:27:09,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626948820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:09,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634809822] [2022-01-18 14:27:09,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:27:09,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:09,451 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:09,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 14:27:09,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 14:27:09,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:27:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:09,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:10,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634809822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:10,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:10,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-18 14:27:10,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086789116] [2022-01-18 14:27:10,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:10,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:27:10,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:10,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:27:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:27:10,106 INFO L87 Difference]: Start difference. First operand 142342 states and 321283 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:12,534 INFO L93 Difference]: Finished difference Result 179901 states and 405654 transitions. [2022-01-18 14:27:12,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 14:27:12,534 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:27:12,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:12,951 INFO L225 Difference]: With dead ends: 179901 [2022-01-18 14:27:12,952 INFO L226 Difference]: Without dead ends: 179789 [2022-01-18 14:27:12,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=600, Invalid=4950, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 14:27:12,952 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 462 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:12,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1952 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:27:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179789 states. [2022-01-18 14:27:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179789 to 152957. [2022-01-18 14:27:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152957 states, 152956 states have (on average 2.259434085619394) internal successors, (345594), 152956 states have internal predecessors, (345594), 0 states have call successors, (0), 0 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 14:27:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152957 states to 152957 states and 345594 transitions. [2022-01-18 14:27:16,333 INFO L78 Accepts]: Start accepts. Automaton has 152957 states and 345594 transitions. Word has length 42 [2022-01-18 14:27:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:16,333 INFO L470 AbstractCegarLoop]: Abstraction has 152957 states and 345594 transitions. [2022-01-18 14:27:16,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 152957 states and 345594 transitions. [2022-01-18 14:27:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:27:16,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:16,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:16,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:16,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 14:27:16,591 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash -817478237, now seen corresponding path program 85 times [2022-01-18 14:27:16,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:16,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291052933] [2022-01-18 14:27:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:16,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:16,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291052933] [2022-01-18 14:27:16,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291052933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019674928] [2022-01-18 14:27:16,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:27:16,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:16,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:16,743 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:16,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 14:27:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:16,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:27:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:17,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019674928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:17,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:17,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-01-18 14:27:17,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964501522] [2022-01-18 14:27:17,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:17,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:27:17,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:17,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:27:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:27:17,317 INFO L87 Difference]: Start difference. First operand 152957 states and 345594 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 14:27:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:19,973 INFO L93 Difference]: Finished difference Result 171427 states and 387538 transitions. [2022-01-18 14:27:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 14:27:19,973 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:27:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:20,344 INFO L225 Difference]: With dead ends: 171427 [2022-01-18 14:27:20,344 INFO L226 Difference]: Without dead ends: 171305 [2022-01-18 14:27:20,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=666, Invalid=5186, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 14:27:20,345 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 487 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:20,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1294 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171305 states. [2022-01-18 14:27:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171305 to 155677. [2022-01-18 14:27:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155677 states, 155676 states have (on average 2.2593334874996787) internal successors, (351724), 155676 states have internal predecessors, (351724), 0 states have call successors, (0), 0 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 14:27:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155677 states to 155677 states and 351724 transitions. [2022-01-18 14:27:23,203 INFO L78 Accepts]: Start accepts. Automaton has 155677 states and 351724 transitions. Word has length 42 [2022-01-18 14:27:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:23,203 INFO L470 AbstractCegarLoop]: Abstraction has 155677 states and 351724 transitions. [2022-01-18 14:27:23,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 14:27:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 155677 states and 351724 transitions. [2022-01-18 14:27:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:27:23,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:23,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:23,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:23,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-18 14:27:23,879 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:23,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -873008797, now seen corresponding path program 86 times [2022-01-18 14:27:23,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104019775] [2022-01-18 14:27:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:23,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:24,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:24,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104019775] [2022-01-18 14:27:24,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104019775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:24,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33468228] [2022-01-18 14:27:24,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:27:24,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:24,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:24,016 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:24,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 14:27:24,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:27:24,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:24,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:27:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:24,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:24,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33468228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:24,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:24,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-18 14:27:24,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395005849] [2022-01-18 14:27:24,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:24,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:27:24,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:27:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:27:24,595 INFO L87 Difference]: Start difference. First operand 155677 states and 351724 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:27:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:26,184 INFO L93 Difference]: Finished difference Result 190477 states and 430272 transitions. [2022-01-18 14:27:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 14:27:26,185 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:27:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:26,620 INFO L225 Difference]: With dead ends: 190477 [2022-01-18 14:27:26,620 INFO L226 Difference]: Without dead ends: 190347 [2022-01-18 14:27:26,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=2958, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 14:27:26,621 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 350 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:26,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1389 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:27:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190347 states. [2022-01-18 14:27:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190347 to 164486. [2022-01-18 14:27:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164486 states, 164485 states have (on average 2.259871720825607) internal successors, (371715), 164485 states have internal predecessors, (371715), 0 states have call successors, (0), 0 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 14:27:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164486 states to 164486 states and 371715 transitions. [2022-01-18 14:27:30,619 INFO L78 Accepts]: Start accepts. Automaton has 164486 states and 371715 transitions. Word has length 42 [2022-01-18 14:27:30,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:30,619 INFO L470 AbstractCegarLoop]: Abstraction has 164486 states and 371715 transitions. [2022-01-18 14:27:30,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:27:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 164486 states and 371715 transitions. [2022-01-18 14:27:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:27:30,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:30,733 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:30,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:30,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:30,945 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1458533117, now seen corresponding path program 87 times [2022-01-18 14:27:30,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:30,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109618956] [2022-01-18 14:27:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:30,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:31,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:31,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109618956] [2022-01-18 14:27:31,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109618956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107718573] [2022-01-18 14:27:31,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:27:31,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:31,100 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:31,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 14:27:31,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:27:31,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:27:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:31,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:27:31,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107718573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:31,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:31,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 29 [2022-01-18 14:27:31,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575485283] [2022-01-18 14:27:31,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:31,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 14:27:31,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 14:27:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:27:31,758 INFO L87 Difference]: Start difference. First operand 164486 states and 371715 transitions. Second operand has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:34,587 INFO L93 Difference]: Finished difference Result 230260 states and 519826 transitions. [2022-01-18 14:27:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 14:27:34,587 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:27:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:35,196 INFO L225 Difference]: With dead ends: 230260 [2022-01-18 14:27:35,197 INFO L226 Difference]: Without dead ends: 230067 [2022-01-18 14:27:35,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=560, Invalid=4842, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 14:27:35,197 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 403 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:35,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 2507 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:27:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230067 states. [2022-01-18 14:27:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230067 to 171304. [2022-01-18 14:27:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171304 states, 171303 states have (on average 2.257812180755737) internal successors, (386770), 171303 states have internal predecessors, (386770), 0 states have call successors, (0), 0 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 14:27:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171304 states to 171304 states and 386770 transitions. [2022-01-18 14:27:39,260 INFO L78 Accepts]: Start accepts. Automaton has 171304 states and 386770 transitions. Word has length 42 [2022-01-18 14:27:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:39,260 INFO L470 AbstractCegarLoop]: Abstraction has 171304 states and 386770 transitions. [2022-01-18 14:27:39,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 171304 states and 386770 transitions. [2022-01-18 14:27:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:27:39,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:39,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:39,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:39,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:39,551 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash -641069333, now seen corresponding path program 88 times [2022-01-18 14:27:39,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:39,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934796119] [2022-01-18 14:27:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:39,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:39,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:39,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934796119] [2022-01-18 14:27:39,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934796119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:39,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596030819] [2022-01-18 14:27:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:27:39,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:39,700 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:39,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 14:27:39,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:27:39,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:39,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:27:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:40,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:40,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596030819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:40,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:40,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-01-18 14:27:40,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563496778] [2022-01-18 14:27:40,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:40,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 14:27:40,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:40,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 14:27:40,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:27:40,323 INFO L87 Difference]: Start difference. First operand 171304 states and 386770 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 14:27:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:42,448 INFO L93 Difference]: Finished difference Result 185433 states and 417528 transitions. [2022-01-18 14:27:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 14:27:42,448 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 42 [2022-01-18 14:27:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:42,909 INFO L225 Difference]: With dead ends: 185433 [2022-01-18 14:27:42,909 INFO L226 Difference]: Without dead ends: 185335 [2022-01-18 14:27:42,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=2861, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 14:27:42,909 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 399 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:42,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1422 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185335 states. [2022-01-18 14:27:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185335 to 174408. [2022-01-18 14:27:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174408 states, 174407 states have (on average 2.2562454488638646) internal successors, (393505), 174407 states have internal predecessors, (393505), 0 states have call successors, (0), 0 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 14:27:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174408 states to 174408 states and 393505 transitions. [2022-01-18 14:27:46,599 INFO L78 Accepts]: Start accepts. Automaton has 174408 states and 393505 transitions. Word has length 42 [2022-01-18 14:27:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:46,599 INFO L470 AbstractCegarLoop]: Abstraction has 174408 states and 393505 transitions. [2022-01-18 14:27:46,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 14:27:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 174408 states and 393505 transitions. [2022-01-18 14:27:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:27:46,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:46,690 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:46,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 14:27:46,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 14:27:46,903 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1507065211, now seen corresponding path program 89 times [2022-01-18 14:27:46,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:46,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258331629] [2022-01-18 14:27:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:46,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:27:47,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:47,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258331629] [2022-01-18 14:27:47,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258331629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:47,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122985298] [2022-01-18 14:27:47,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:27:47,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:47,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:47,044 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:47,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 14:27:47,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:27:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:27:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:47,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:48,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122985298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:48,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:48,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 14:27:48,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129958696] [2022-01-18 14:27:48,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:48,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 14:27:48,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:48,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 14:27:48,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:27:48,172 INFO L87 Difference]: Start difference. First operand 174408 states and 393505 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 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 14:27:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:50,317 INFO L93 Difference]: Finished difference Result 192221 states and 434093 transitions. [2022-01-18 14:27:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 14:27:50,317 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 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 42 [2022-01-18 14:27:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:50,808 INFO L225 Difference]: With dead ends: 192221 [2022-01-18 14:27:50,809 INFO L226 Difference]: Without dead ends: 192171 [2022-01-18 14:27:50,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=649, Invalid=4607, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 14:27:50,809 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 439 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:50,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 1208 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:27:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192171 states. [2022-01-18 14:27:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192171 to 175638. [2022-01-18 14:27:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175638 states, 175637 states have (on average 2.2555725729772202) internal successors, (396162), 175637 states have internal predecessors, (396162), 0 states have call successors, (0), 0 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 14:27:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175638 states to 175638 states and 396162 transitions. [2022-01-18 14:27:54,772 INFO L78 Accepts]: Start accepts. Automaton has 175638 states and 396162 transitions. Word has length 42 [2022-01-18 14:27:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:54,772 INFO L470 AbstractCegarLoop]: Abstraction has 175638 states and 396162 transitions. [2022-01-18 14:27:54,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 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 14:27:54,772 INFO L276 IsEmpty]: Start isEmpty. Operand 175638 states and 396162 transitions. [2022-01-18 14:27:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:27:54,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:54,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:54,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:55,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:55,056 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2108010061, now seen corresponding path program 90 times [2022-01-18 14:27:55,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:55,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310329871] [2022-01-18 14:27:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:55,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:27:55,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310329871] [2022-01-18 14:27:55,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310329871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:55,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034180453] [2022-01-18 14:27:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:27:55,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:55,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:55,212 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:55,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 14:27:55,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:27:55,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:27:55,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:55,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:56,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034180453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:56,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:56,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-01-18 14:27:56,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744240064] [2022-01-18 14:27:56,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:56,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 14:27:56,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:56,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 14:27:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:27:56,305 INFO L87 Difference]: Start difference. First operand 175638 states and 396162 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 14:27:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:58,042 INFO L93 Difference]: Finished difference Result 201196 states and 454179 transitions. [2022-01-18 14:27:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 14:27:58,042 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 42 [2022-01-18 14:27:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:58,562 INFO L225 Difference]: With dead ends: 201196 [2022-01-18 14:27:58,563 INFO L226 Difference]: Without dead ends: 201118 [2022-01-18 14:27:58,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=2707, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 14:27:58,563 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 261 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:58,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 1185 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:27:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201118 states. [2022-01-18 14:28:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201118 to 173991. [2022-01-18 14:28:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173991 states, 173990 states have (on average 2.256411288005058) internal successors, (392593), 173990 states have internal predecessors, (392593), 0 states have call successors, (0), 0 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 14:28:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173991 states to 173991 states and 392593 transitions. [2022-01-18 14:28:02,389 INFO L78 Accepts]: Start accepts. Automaton has 173991 states and 392593 transitions. Word has length 42 [2022-01-18 14:28:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:02,389 INFO L470 AbstractCegarLoop]: Abstraction has 173991 states and 392593 transitions. [2022-01-18 14:28:02,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 14:28:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 173991 states and 392593 transitions. [2022-01-18 14:28:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:28:02,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:02,934 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:02,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 14:28:03,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 14:28:03,147 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1299294989, now seen corresponding path program 91 times [2022-01-18 14:28:03,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:03,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072897563] [2022-01-18 14:28:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:03,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:28:03,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:03,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072897563] [2022-01-18 14:28:03,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072897563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:03,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240898589] [2022-01-18 14:28:03,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:28:03,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:03,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:03,285 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:03,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 14:28:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:28:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:28:03,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:28:03,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240898589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:03,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:03,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-18 14:28:03,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656185417] [2022-01-18 14:28:03,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:03,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:28:03,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:03,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:28:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:28:03,859 INFO L87 Difference]: Start difference. First operand 173991 states and 392593 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:28:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:05,510 INFO L93 Difference]: Finished difference Result 203527 states and 459273 transitions. [2022-01-18 14:28:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 14:28:05,510 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:28:05,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:06,502 INFO L225 Difference]: With dead ends: 203527 [2022-01-18 14:28:06,502 INFO L226 Difference]: Without dead ends: 203409 [2022-01-18 14:28:06,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=2273, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 14:28:06,502 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 330 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:06,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1219 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:28:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203409 states. [2022-01-18 14:28:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203409 to 176754. [2022-01-18 14:28:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176754 states, 176753 states have (on average 2.2560522310795292) internal successors, (398764), 176753 states have internal predecessors, (398764), 0 states have call successors, (0), 0 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 14:28:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176754 states to 176754 states and 398764 transitions. [2022-01-18 14:28:10,347 INFO L78 Accepts]: Start accepts. Automaton has 176754 states and 398764 transitions. Word has length 42 [2022-01-18 14:28:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:10,348 INFO L470 AbstractCegarLoop]: Abstraction has 176754 states and 398764 transitions. [2022-01-18 14:28:10,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:28:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 176754 states and 398764 transitions. [2022-01-18 14:28:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:28:10,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:10,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:10,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:10,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 14:28:10,629 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1552315221, now seen corresponding path program 92 times [2022-01-18 14:28:10,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215087768] [2022-01-18 14:28:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:10,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:28:10,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:10,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215087768] [2022-01-18 14:28:10,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215087768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:10,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829005679] [2022-01-18 14:28:10,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:28:10,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:10,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:10,777 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:10,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 14:28:10,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:28:10,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:28:10,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:11,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829005679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:11,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:11,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-01-18 14:28:11,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106273454] [2022-01-18 14:28:11,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:11,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:28:11,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:28:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:28:11,357 INFO L87 Difference]: Start difference. First operand 176754 states and 398764 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 14:28:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:14,039 INFO L93 Difference]: Finished difference Result 191220 states and 431180 transitions. [2022-01-18 14:28:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 14:28:14,040 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:28:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:14,456 INFO L225 Difference]: With dead ends: 191220 [2022-01-18 14:28:14,456 INFO L226 Difference]: Without dead ends: 191130 [2022-01-18 14:28:14,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=440, Invalid=3592, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 14:28:14,456 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 356 mSDsluCounter, 1763 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:14,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 1507 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:28:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191130 states. [2022-01-18 14:28:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191130 to 185093. [2022-01-18 14:28:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185093 states, 185092 states have (on average 2.257336891924016) internal successors, (417815), 185092 states have internal predecessors, (417815), 0 states have call successors, (0), 0 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 14:28:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185093 states to 185093 states and 417815 transitions. [2022-01-18 14:28:18,244 INFO L78 Accepts]: Start accepts. Automaton has 185093 states and 417815 transitions. Word has length 42 [2022-01-18 14:28:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:18,244 INFO L470 AbstractCegarLoop]: Abstraction has 185093 states and 417815 transitions. [2022-01-18 14:28:18,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 14:28:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 185093 states and 417815 transitions. [2022-01-18 14:28:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:28:18,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:18,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:18,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:18,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-01-18 14:28:18,541 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash -90198083, now seen corresponding path program 93 times [2022-01-18 14:28:18,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:18,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996842783] [2022-01-18 14:28:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:18,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:28:18,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996842783] [2022-01-18 14:28:18,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996842783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776851286] [2022-01-18 14:28:18,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:28:18,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:18,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:18,674 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:18,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 14:28:18,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:28:18,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:18,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:28:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:18,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:28:19,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776851286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:19,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:19,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 29 [2022-01-18 14:28:19,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966824487] [2022-01-18 14:28:19,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:19,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 14:28:19,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 14:28:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:28:19,310 INFO L87 Difference]: Start difference. First operand 185093 states and 417815 transitions. Second operand has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:22,240 INFO L93 Difference]: Finished difference Result 261505 states and 588740 transitions. [2022-01-18 14:28:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 14:28:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:28:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:22,980 INFO L225 Difference]: With dead ends: 261505 [2022-01-18 14:28:22,980 INFO L226 Difference]: Without dead ends: 261363 [2022-01-18 14:28:22,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=555, Invalid=4847, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 14:28:22,981 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 409 mSDsluCounter, 2480 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:22,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 2224 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:28:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261363 states. [2022-01-18 14:28:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261363 to 175416. [2022-01-18 14:28:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175416 states, 175415 states have (on average 2.262258073710914) internal successors, (396834), 175415 states have internal predecessors, (396834), 0 states have call successors, (0), 0 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 14:28:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175416 states to 175416 states and 396834 transitions. [2022-01-18 14:28:27,664 INFO L78 Accepts]: Start accepts. Automaton has 175416 states and 396834 transitions. Word has length 42 [2022-01-18 14:28:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:27,665 INFO L470 AbstractCegarLoop]: Abstraction has 175416 states and 396834 transitions. [2022-01-18 14:28:27,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 175416 states and 396834 transitions. [2022-01-18 14:28:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:28:27,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:27,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:27,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:27,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:27,948 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash 927830853, now seen corresponding path program 94 times [2022-01-18 14:28:27,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:27,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526444676] [2022-01-18 14:28:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:27,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:28:28,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526444676] [2022-01-18 14:28:28,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526444676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978688601] [2022-01-18 14:28:28,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:28:28,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:28,084 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:28,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 14:28:28,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:28:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:28:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:28:28,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:28:28,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978688601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:28,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:28,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-18 14:28:28,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968487813] [2022-01-18 14:28:28,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:28,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:28:28,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:28:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:28:28,659 INFO L87 Difference]: Start difference. First operand 175416 states and 396834 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 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 14:28:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:30,613 INFO L93 Difference]: Finished difference Result 179081 states and 404765 transitions. [2022-01-18 14:28:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 14:28:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 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 42 [2022-01-18 14:28:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:31,037 INFO L225 Difference]: With dead ends: 179081 [2022-01-18 14:28:31,037 INFO L226 Difference]: Without dead ends: 178977 [2022-01-18 14:28:31,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 14:28:31,037 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 347 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:31,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 957 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:28:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178977 states. [2022-01-18 14:28:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178977 to 177054. [2022-01-18 14:28:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177054 states, 177053 states have (on average 2.262237860979481) internal successors, (400536), 177053 states have internal predecessors, (400536), 0 states have call successors, (0), 0 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 14:28:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177054 states to 177054 states and 400536 transitions. [2022-01-18 14:28:34,702 INFO L78 Accepts]: Start accepts. Automaton has 177054 states and 400536 transitions. Word has length 42 [2022-01-18 14:28:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:34,702 INFO L470 AbstractCegarLoop]: Abstraction has 177054 states and 400536 transitions. [2022-01-18 14:28:34,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 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 14:28:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 177054 states and 400536 transitions. [2022-01-18 14:28:34,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:28:34,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:34,790 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:34,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:35,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:35,006 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:35,006 INFO L85 PathProgramCache]: Analyzing trace with hash 284724011, now seen corresponding path program 95 times [2022-01-18 14:28:35,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:35,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691768660] [2022-01-18 14:28:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:35,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:28:35,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:35,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691768660] [2022-01-18 14:28:35,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691768660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:35,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174601142] [2022-01-18 14:28:35,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:28:35,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:35,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:35,147 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:35,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 14:28:35,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:28:35,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:28:35,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:35,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174601142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:35,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:35,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 24 [2022-01-18 14:28:35,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867350829] [2022-01-18 14:28:35,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:35,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:28:35,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:28:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:28:35,637 INFO L87 Difference]: Start difference. First operand 177054 states and 400536 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 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 14:28:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:37,263 INFO L93 Difference]: Finished difference Result 197730 states and 446757 transitions. [2022-01-18 14:28:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:28:37,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:28:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:37,763 INFO L225 Difference]: With dead ends: 197730 [2022-01-18 14:28:37,763 INFO L226 Difference]: Without dead ends: 197642 [2022-01-18 14:28:37,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:28:37,763 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 202 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:37,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 961 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:28:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197642 states. [2022-01-18 14:28:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197642 to 186125. [2022-01-18 14:28:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186125 states, 186124 states have (on average 2.2632760955062214) internal successors, (421250), 186124 states have internal predecessors, (421250), 0 states have call successors, (0), 0 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 14:28:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186125 states to 186125 states and 421250 transitions. [2022-01-18 14:28:41,628 INFO L78 Accepts]: Start accepts. Automaton has 186125 states and 421250 transitions. Word has length 42 [2022-01-18 14:28:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:41,628 INFO L470 AbstractCegarLoop]: Abstraction has 186125 states and 421250 transitions. [2022-01-18 14:28:41,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 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 14:28:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 186125 states and 421250 transitions. [2022-01-18 14:28:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:28:41,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:41,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:41,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 14:28:41,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 14:28:41,931 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash -475062237, now seen corresponding path program 96 times [2022-01-18 14:28:41,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:41,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740967965] [2022-01-18 14:28:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:41,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:28:42,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:42,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740967965] [2022-01-18 14:28:42,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740967965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:42,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669051288] [2022-01-18 14:28:42,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:28:42,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:42,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:42,079 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:42,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 14:28:42,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:28:42,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:42,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:28:42,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:42,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:42,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669051288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:42,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:42,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 24 [2022-01-18 14:28:42,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915739353] [2022-01-18 14:28:42,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:42,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:28:42,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:28:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:28:42,596 INFO L87 Difference]: Start difference. First operand 186125 states and 421250 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:44,230 INFO L93 Difference]: Finished difference Result 203761 states and 460278 transitions. [2022-01-18 14:28:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:28:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:28:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:44,740 INFO L225 Difference]: With dead ends: 203761 [2022-01-18 14:28:44,740 INFO L226 Difference]: Without dead ends: 203683 [2022-01-18 14:28:44,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:28:44,740 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 300 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:44,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 741 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:28:44,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203683 states. [2022-01-18 14:28:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203683 to 191634. [2022-01-18 14:28:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191634 states, 191633 states have (on average 2.263201014439058) internal successors, (433704), 191633 states have internal predecessors, (433704), 0 states have call successors, (0), 0 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 14:28:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191634 states to 191634 states and 433704 transitions. [2022-01-18 14:28:48,787 INFO L78 Accepts]: Start accepts. Automaton has 191634 states and 433704 transitions. Word has length 42 [2022-01-18 14:28:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:48,787 INFO L470 AbstractCegarLoop]: Abstraction has 191634 states and 433704 transitions. [2022-01-18 14:28:48,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 191634 states and 433704 transitions. [2022-01-18 14:28:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:28:48,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:48,875 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:48,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:49,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:49,075 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash 727974827, now seen corresponding path program 97 times [2022-01-18 14:28:49,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:49,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490656147] [2022-01-18 14:28:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:49,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:28:49,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:49,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490656147] [2022-01-18 14:28:49,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490656147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:49,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824052201] [2022-01-18 14:28:49,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:28:49,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:49,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:49,205 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 14:28:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:28:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:28:49,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:28:49,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824052201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:49,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:49,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 24 [2022-01-18 14:28:49,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155758780] [2022-01-18 14:28:49,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:49,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:28:49,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:49,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:28:49,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:28:49,730 INFO L87 Difference]: Start difference. First operand 191634 states and 433704 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 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 14:28:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:51,505 INFO L93 Difference]: Finished difference Result 208240 states and 470364 transitions. [2022-01-18 14:28:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 14:28:51,505 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 14:28:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:52,075 INFO L225 Difference]: With dead ends: 208240 [2022-01-18 14:28:52,075 INFO L226 Difference]: Without dead ends: 208171 [2022-01-18 14:28:52,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 14:28:52,075 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 384 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:52,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 799 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:28:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208171 states. [2022-01-18 14:28:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208171 to 195614. [2022-01-18 14:28:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195614 states, 195613 states have (on average 2.2637503642395957) internal successors, (442819), 195613 states have internal predecessors, (442819), 0 states have call successors, (0), 0 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 14:28:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195614 states to 195614 states and 442819 transitions. [2022-01-18 14:28:56,745 INFO L78 Accepts]: Start accepts. Automaton has 195614 states and 442819 transitions. Word has length 42 [2022-01-18 14:28:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:56,745 INFO L470 AbstractCegarLoop]: Abstraction has 195614 states and 442819 transitions. [2022-01-18 14:28:56,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 24 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 14:28:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 195614 states and 442819 transitions. [2022-01-18 14:28:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 14:28:56,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:56,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:56,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:57,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:57,031 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2046633711, now seen corresponding path program 98 times [2022-01-18 14:28:57,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:57,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269478152] [2022-01-18 14:28:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:57,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:28:57,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:57,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269478152] [2022-01-18 14:28:57,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269478152] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:57,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983758760] [2022-01-18 14:28:57,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:28:57,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:57,165 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:57,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 14:28:57,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:28:57,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:28:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:57,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:57,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983758760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:57,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:57,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-01-18 14:28:57,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138612263] [2022-01-18 14:28:57,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:57,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:28:57,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:28:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:28:57,699 INFO L87 Difference]: Start difference. First operand 195614 states and 442819 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 14:28:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:59,199 INFO L93 Difference]: Finished difference Result 200245 states and 452890 transitions. [2022-01-18 14:28:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 14:28:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 42 [2022-01-18 14:28:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:00,226 INFO L225 Difference]: With dead ends: 200245 [2022-01-18 14:29:00,226 INFO L226 Difference]: Without dead ends: 200159 [2022-01-18 14:29:00,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 14:29:00,226 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 213 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:00,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1083 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:29:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200159 states. [2022-01-18 14:29:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200159 to 196947. [2022-01-18 14:29:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196947 states, 196946 states have (on average 2.2636611050744873) internal successors, (445819), 196946 states have internal predecessors, (445819), 0 states have call successors, (0), 0 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 14:29:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196947 states to 196947 states and 445819 transitions. [2022-01-18 14:29:04,211 INFO L78 Accepts]: Start accepts. Automaton has 196947 states and 445819 transitions. Word has length 42 [2022-01-18 14:29:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:04,211 INFO L470 AbstractCegarLoop]: Abstraction has 196947 states and 445819 transitions. [2022-01-18 14:29:04,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 14:29:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 196947 states and 445819 transitions. [2022-01-18 14:29:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 14:29:04,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:04,302 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:04,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:04,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:04,503 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:04,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1028391963, now seen corresponding path program 10 times [2022-01-18 14:29:04,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518810662] [2022-01-18 14:29:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:04,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:04,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:04,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518810662] [2022-01-18 14:29:04,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518810662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:04,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834658097] [2022-01-18 14:29:04,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:29:04,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:04,538 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:04,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 14:29:04,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:29:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:29:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:29:04,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:29:04,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834658097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:04,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:04,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:29:04,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581247517] [2022-01-18 14:29:04,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:04,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:29:04,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:04,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:29:04,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:29:04,673 INFO L87 Difference]: Start difference. First operand 196947 states and 445819 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 14:29:06,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:06,302 INFO L93 Difference]: Finished difference Result 215516 states and 486551 transitions. [2022-01-18 14:29:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:29:06,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 14:29:06,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:07,143 INFO L225 Difference]: With dead ends: 215516 [2022-01-18 14:29:07,143 INFO L226 Difference]: Without dead ends: 215510 [2022-01-18 14:29:07,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:29:07,143 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 147 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:07,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 166 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215510 states. [2022-01-18 14:29:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215510 to 207146. [2022-01-18 14:29:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207146 states, 207145 states have (on average 2.2703372034082405) internal successors, (470289), 207145 states have internal predecessors, (470289), 0 states have call successors, (0), 0 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 14:29:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207146 states to 207146 states and 470289 transitions. [2022-01-18 14:29:11,346 INFO L78 Accepts]: Start accepts. Automaton has 207146 states and 470289 transitions. Word has length 43 [2022-01-18 14:29:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:11,346 INFO L470 AbstractCegarLoop]: Abstraction has 207146 states and 470289 transitions. [2022-01-18 14:29:11,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 14:29:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 207146 states and 470289 transitions. [2022-01-18 14:29:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 14:29:11,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:11,441 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:11,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:11,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 14:29:11,642 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash -351337331, now seen corresponding path program 11 times [2022-01-18 14:29:11,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:11,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364261457] [2022-01-18 14:29:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:11,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:11,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364261457] [2022-01-18 14:29:11,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364261457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718269148] [2022-01-18 14:29:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:29:11,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:11,676 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:11,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 14:29:11,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:29:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:29:11,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:29:11,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:29:11,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718269148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:11,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:11,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:29:11,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381556839] [2022-01-18 14:29:11,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:11,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:29:11,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:29:11,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:29:11,804 INFO L87 Difference]: Start difference. First operand 207146 states and 470289 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 14:29:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:13,227 INFO L93 Difference]: Finished difference Result 210244 states and 475279 transitions. [2022-01-18 14:29:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:29:13,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 14:29:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:13,798 INFO L225 Difference]: With dead ends: 210244 [2022-01-18 14:29:13,798 INFO L226 Difference]: Without dead ends: 210241 [2022-01-18 14:29:13,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:29:13,798 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 121 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:13,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 238 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210241 states. [2022-01-18 14:29:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210241 to 207146. [2022-01-18 14:29:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207146 states, 207145 states have (on average 2.2693620410823336) internal successors, (470087), 207145 states have internal predecessors, (470087), 0 states have call successors, (0), 0 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 14:29:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207146 states to 207146 states and 470087 transitions. [2022-01-18 14:29:18,720 INFO L78 Accepts]: Start accepts. Automaton has 207146 states and 470087 transitions. Word has length 43 [2022-01-18 14:29:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:18,720 INFO L470 AbstractCegarLoop]: Abstraction has 207146 states and 470087 transitions. [2022-01-18 14:29:18,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 14:29:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 207146 states and 470087 transitions. [2022-01-18 14:29:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 14:29:18,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:18,794 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:18,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:18,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 14:29:18,995 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1988909787, now seen corresponding path program 12 times [2022-01-18 14:29:18,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:18,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540436634] [2022-01-18 14:29:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:18,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:19,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540436634] [2022-01-18 14:29:19,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540436634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825426617] [2022-01-18 14:29:19,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:29:19,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:19,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:19,031 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:19,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 14:29:19,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:29:19,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:19,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:29:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:19,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825426617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:19,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:19,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:29:19,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682791697] [2022-01-18 14:29:19,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:19,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:29:19,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:19,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:29:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:29:19,159 INFO L87 Difference]: Start difference. First operand 207146 states and 470087 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 14:29:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:20,036 INFO L93 Difference]: Finished difference Result 210193 states and 474977 transitions. [2022-01-18 14:29:20,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:29:20,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 14:29:20,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:21,144 INFO L225 Difference]: With dead ends: 210193 [2022-01-18 14:29:21,144 INFO L226 Difference]: Without dead ends: 210175 [2022-01-18 14:29:21,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:29:21,144 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 159 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:21,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 233 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:29:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210175 states. [2022-01-18 14:29:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210175 to 207146. Received shutdown request... [2022-01-18 14:29:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207146 states, 207145 states have (on average 2.2688165294841776) internal successors, (469974), 207145 states have internal predecessors, (469974), 0 states have call successors, (0), 0 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 14:29:24,698 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 14:29:24,712 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:29:24,712 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 14:29:24,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:24,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 14:29:24,899 WARN L594 AbstractCegarLoop]: Verification canceled: while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). [2022-01-18 14:29:24,900 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 14:29:24,900 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 14:29:24,902 INFO L732 BasicCegarLoop]: Path program histogram: [98, 12, 2, 1, 1] [2022-01-18 14:29:24,904 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 14:29:24,904 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 14:29:24,905 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 02:29:24 BasicIcfg [2022-01-18 14:29:24,905 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 14:29:24,905 INFO L158 Benchmark]: Toolchain (without parser) took 697266.21ms. Allocated memory was 423.6MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 384.1MB in the beginning and 12.7GB in the end (delta: -12.3GB). Peak memory consumption was 3.7GB. Max. memory is 16.0GB. [2022-01-18 14:29:24,905 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 423.6MB. Free memory is still 385.1MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:29:24,905 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.31ms. Allocated memory is still 423.6MB. Free memory was 384.0MB in the beginning and 382.5MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 14:29:24,906 INFO L158 Benchmark]: Boogie Preprocessor took 13.84ms. Allocated memory is still 423.6MB. Free memory was 382.5MB in the beginning and 381.5MB in the end (delta: 926.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:29:24,906 INFO L158 Benchmark]: RCFGBuilder took 183.12ms. Allocated memory is still 423.6MB. Free memory was 381.5MB in the beginning and 372.8MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 14:29:24,906 INFO L158 Benchmark]: TraceAbstraction took 697046.50ms. Allocated memory was 423.6MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 372.3MB in the beginning and 12.7GB in the end (delta: -12.3GB). Peak memory consumption was 3.7GB. Max. memory is 16.0GB. [2022-01-18 14:29:24,906 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 423.6MB. Free memory is still 385.1MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.31ms. Allocated memory is still 423.6MB. Free memory was 384.0MB in the beginning and 382.5MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.84ms. Allocated memory is still 423.6MB. Free memory was 382.5MB in the beginning and 381.5MB in the end (delta: 926.3kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 183.12ms. Allocated memory is still 423.6MB. Free memory was 381.5MB in the beginning and 372.8MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 697046.50ms. Allocated memory was 423.6MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 372.3MB in the beginning and 12.7GB in the end (delta: -12.3GB). Peak memory consumption was 3.7GB. 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: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 696.9s, OverallIterations: 114, TraceHistogramMax: 5, PathProgramHistogramMax: 98, EmptinessCheckTime: 6.2s, AutomataDifference: 260.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32746 SdHoareTripleChecker+Valid, 43.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32746 mSDsluCounter, 129807 SdHoareTripleChecker+Invalid, 36.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 141196 mSDsCounter, 7622 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 113438 IncrementalHoareTripleChecker+Invalid, 121060 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7622 mSolverCounterUnsat, 9584 mSDtfsCounter, 113438 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11893 GetRequests, 6225 SyntacticMatches, 423 SemanticMatches, 5245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116147 ImplicationChecksByTransitivity, 104.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357309occurred in iteration=91, InterpolantAutomatonStates: 4666, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 345.7s AutomataMinimizationTime, 114 MinimizatonAttempts, 1400379 StatesRemovedByMinimization, 113 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 58.1s InterpolantComputationTime, 7812 NumberOfCodeBlocks, 7794 NumberOfCodeBlocksAsserted, 449 NumberOfCheckSat, 11359 ConstructedInterpolants, 0 QuantifiedInterpolants, 121537 SizeOfPredicates, 522 NumberOfNonLiveVariables, 7276 ConjunctsInSsa, 1809 ConjunctsInUnsatCore, 336 InterpolantComputations, 3 PerfectInterpolantSequences, 2465/10053 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