/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:35:07,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:35:07,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:35:07,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:35:07,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 16:35:07,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 16:35:07,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 16:35:07,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:35:07,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:35:07,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:35:07,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:35:07,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:35:07,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:35:07,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:35:07,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:35:07,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:35:07,357 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:35:07,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:35:07,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:35:07,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:35:07,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:35:07,359 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:35:07,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:35:07,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:35:07,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:35:07,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:35:07,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:35:07,585 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:35:07,587 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:35:07,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2022-03-15 16:35:07,588 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2022-03-15 16:35:07,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:35:07,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:35:07,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:35:07,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:35:07,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:35:07,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,640 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:35:07,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:35:07,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:35:07,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:35:07,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:35:07,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:35:07,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:35:07,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:35:07,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:35:07,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/1) ... [2022-03-15 16:35:07,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:35:07,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:07,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:35:07,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:35:07,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:35:07,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:35:07,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:35:07,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:35:07,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:35:07,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:35:07,738 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:35:07,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:35:07,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:35:07,739 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:35:07,782 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:35:07,783 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:35:07,892 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:35:07,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:35:07,904 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:35:07,905 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:35:07 BoogieIcfgContainer [2022-03-15 16:35:07,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:35:07,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:35:07,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:35:07,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:35:07,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:35:07" (1/2) ... [2022-03-15 16:35:07,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c173755 and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:35:07, skipping insertion in model container [2022-03-15 16:35:07,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:35:07" (2/2) ... [2022-03-15 16:35:07,924 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2022-03-15 16:35:07,927 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:35:07,927 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:35:07,928 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:35:07,928 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:35:07,947 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:35:07,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:35:07,982 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:35:07,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:35:08,002 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2022-03-15 16:35:08,018 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 16:35:08,024 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:08,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:08,025 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:08,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1895407217, now seen corresponding path program 1 times [2022-03-15 16:35:08,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:08,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130594130] [2022-03-15 16:35:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:08,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:08,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130594130] [2022-03-15 16:35:08,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130594130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:35:08,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:35:08,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:35:08,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065680815] [2022-03-15 16:35:08,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:35:08,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:35:08,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:08,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:35:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:35:08,214 INFO L87 Difference]: Start difference. First operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:08,242 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2022-03-15 16:35:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:35:08,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 16:35:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:08,259 INFO L225 Difference]: With dead ends: 38 [2022-03-15 16:35:08,259 INFO L226 Difference]: Without dead ends: 38 [2022-03-15 16:35:08,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:35:08,263 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:08,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:35:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-15 16:35:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-15 16:35:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2022-03-15 16:35:08,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2022-03-15 16:35:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:08,319 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2022-03-15 16:35:08,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2022-03-15 16:35:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:35:08,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:08,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:08,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:35:08,324 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash 161461187, now seen corresponding path program 1 times [2022-03-15 16:35:08,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:08,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894270363] [2022-03-15 16:35:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:08,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:08,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894270363] [2022-03-15 16:35:08,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894270363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:35:08,402 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:35:08,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:35:08,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197035489] [2022-03-15 16:35:08,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:35:08,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:35:08,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:08,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:35:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:35:08,404 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:08,441 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2022-03-15 16:35:08,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:35:08,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:35:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:08,444 INFO L225 Difference]: With dead ends: 62 [2022-03-15 16:35:08,444 INFO L226 Difference]: Without dead ends: 62 [2022-03-15 16:35:08,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:35:08,446 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:08,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:35:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-15 16:35:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-15 16:35:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2022-03-15 16:35:08,455 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2022-03-15 16:35:08,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:08,455 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2022-03-15 16:35:08,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2022-03-15 16:35:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:35:08,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:08,456 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] [2022-03-15 16:35:08,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:35:08,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:08,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1536775877, now seen corresponding path program 1 times [2022-03-15 16:35:08,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:08,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284274029] [2022-03-15 16:35:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:08,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:35:08,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:08,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284274029] [2022-03-15 16:35:08,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284274029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:35:08,504 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:35:08,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:35:08,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750088691] [2022-03-15 16:35:08,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:35:08,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:35:08,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:35:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:35:08,506 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:08,530 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2022-03-15 16:35:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:35:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:35:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:08,533 INFO L225 Difference]: With dead ends: 87 [2022-03-15 16:35:08,534 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 16:35:08,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:35:08,535 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:08,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:35:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 16:35:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2022-03-15 16:35:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2022-03-15 16:35:08,542 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2022-03-15 16:35:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:08,542 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2022-03-15 16:35:08,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2022-03-15 16:35:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:35:08,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:08,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:08,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:35:08,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1011707577, now seen corresponding path program 2 times [2022-03-15 16:35:08,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:08,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539024856] [2022-03-15 16:35:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:08,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:35:08,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:08,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539024856] [2022-03-15 16:35:08,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539024856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:08,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588890301] [2022-03-15 16:35:08,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:35:08,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:08,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:08,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:08,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:35:08,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:35:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:35:08,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:09,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:10,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588890301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:10,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:10,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-03-15 16:35:10,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962865782] [2022-03-15 16:35:10,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:10,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:35:10,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:35:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:35:10,192 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:11,158 INFO L93 Difference]: Finished difference Result 216 states and 395 transitions. [2022-03-15 16:35:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:35:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:35:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:11,160 INFO L225 Difference]: With dead ends: 216 [2022-03-15 16:35:11,160 INFO L226 Difference]: Without dead ends: 167 [2022-03-15 16:35:11,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:35:11,162 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 249 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:11,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 164 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:35:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-15 16:35:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 82. [2022-03-15 16:35:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 159 transitions. [2022-03-15 16:35:11,171 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 159 transitions. Word has length 22 [2022-03-15 16:35:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:11,172 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 159 transitions. [2022-03-15 16:35:11,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 159 transitions. [2022-03-15 16:35:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:35:11,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:11,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:11,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 16:35:11,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:11,391 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:11,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1602763079, now seen corresponding path program 3 times [2022-03-15 16:35:11,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:11,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466452889] [2022-03-15 16:35:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:11,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:11,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466452889] [2022-03-15 16:35:11,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466452889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:11,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684462567] [2022-03-15 16:35:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:35:11,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:11,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:11,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:35:11,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:35:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:35:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:12,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:12,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684462567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:12,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:12,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-15 16:35:12,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401772497] [2022-03-15 16:35:12,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:12,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:35:12,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:35:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:35:12,450 INFO L87 Difference]: Start difference. First operand 82 states and 159 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:13,573 INFO L93 Difference]: Finished difference Result 230 states and 427 transitions. [2022-03-15 16:35:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:35:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:35:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:13,575 INFO L225 Difference]: With dead ends: 230 [2022-03-15 16:35:13,575 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 16:35:13,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=599, Invalid=2371, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:35:13,577 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:13,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 152 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:35:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 16:35:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2022-03-15 16:35:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-03-15 16:35:13,589 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-03-15 16:35:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:13,589 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-03-15 16:35:13,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-03-15 16:35:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:35:13,590 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:13,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:13,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:13,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:13,791 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:13,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash -995630777, now seen corresponding path program 4 times [2022-03-15 16:35:13,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:13,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630010370] [2022-03-15 16:35:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:13,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:13,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630010370] [2022-03-15 16:35:13,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630010370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:13,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196079269] [2022-03-15 16:35:13,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:35:13,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:13,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:13,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:13,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:35:13,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:35:13,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:13,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:35:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:14,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:14,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196079269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:14,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:14,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2022-03-15 16:35:14,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748484986] [2022-03-15 16:35:14,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:14,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:35:14,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:35:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:35:14,818 INFO L87 Difference]: Start difference. First operand 99 states and 200 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:15,951 INFO L93 Difference]: Finished difference Result 273 states and 531 transitions. [2022-03-15 16:35:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:35:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:35:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:15,953 INFO L225 Difference]: With dead ends: 273 [2022-03-15 16:35:15,953 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 16:35:15,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=740, Invalid=2920, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:35:15,957 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 245 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:15,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 134 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:35:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 16:35:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 99. [2022-03-15 16:35:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-03-15 16:35:15,976 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-03-15 16:35:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:15,976 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-03-15 16:35:15,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-03-15 16:35:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:35:15,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:15,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:15,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 16:35:16,192 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 [2022-03-15 16:35:16,192 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:16,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2016379011, now seen corresponding path program 5 times [2022-03-15 16:35:16,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:16,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330957144] [2022-03-15 16:35:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:16,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:16,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:16,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330957144] [2022-03-15 16:35:16,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330957144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:16,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666761346] [2022-03-15 16:35:16,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:35:16,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:16,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:16,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:35:16,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:35:16,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:35:16,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:16,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:17,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666761346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:17,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:17,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-15 16:35:17,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095630753] [2022-03-15 16:35:17,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:17,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:35:17,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:35:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:35:17,285 INFO L87 Difference]: Start difference. First operand 99 states and 200 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:18,776 INFO L93 Difference]: Finished difference Result 251 states and 474 transitions. [2022-03-15 16:35:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:35:18,776 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:35:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:18,778 INFO L225 Difference]: With dead ends: 251 [2022-03-15 16:35:18,778 INFO L226 Difference]: Without dead ends: 237 [2022-03-15 16:35:18,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=771, Invalid=3389, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:35:18,779 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:18,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 178 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:35:18,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-15 16:35:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 127. [2022-03-15 16:35:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0952380952380953) internal successors, (264), 126 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 264 transitions. [2022-03-15 16:35:18,787 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 264 transitions. Word has length 22 [2022-03-15 16:35:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:18,788 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 264 transitions. [2022-03-15 16:35:18,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 264 transitions. [2022-03-15 16:35:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:35:18,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:18,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:18,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:19,011 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 [2022-03-15 16:35:19,011 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash -582014845, now seen corresponding path program 6 times [2022-03-15 16:35:19,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:19,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089075498] [2022-03-15 16:35:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:19,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:19,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089075498] [2022-03-15 16:35:19,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089075498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:19,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901160285] [2022-03-15 16:35:19,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:35:19,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:19,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:19,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:19,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:35:19,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:35:19,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:35:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:19,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:20,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901160285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:20,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:20,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2022-03-15 16:35:20,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169841627] [2022-03-15 16:35:20,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:20,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:35:20,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:35:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:35:20,058 INFO L87 Difference]: Start difference. First operand 127 states and 264 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:21,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:21,457 INFO L93 Difference]: Finished difference Result 329 states and 643 transitions. [2022-03-15 16:35:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:35:21,458 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:35:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:21,459 INFO L225 Difference]: With dead ends: 329 [2022-03-15 16:35:21,459 INFO L226 Difference]: Without dead ends: 265 [2022-03-15 16:35:21,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=843, Invalid=3713, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:35:21,461 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 291 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:21,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 134 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:35:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-15 16:35:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 128. [2022-03-15 16:35:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.094488188976378) internal successors, (266), 127 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-03-15 16:35:21,466 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-03-15 16:35:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:21,466 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-03-15 16:35:21,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-03-15 16:35:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:35:21,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:21,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:21,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:21,667 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 [2022-03-15 16:35:21,668 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1739125057, now seen corresponding path program 7 times [2022-03-15 16:35:21,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:21,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048872816] [2022-03-15 16:35:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:21,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:21,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:21,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048872816] [2022-03-15 16:35:21,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048872816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:21,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935451672] [2022-03-15 16:35:21,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:35:21,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:21,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:21,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:21,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:35:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:21,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:35:21,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:22,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:22,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935451672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:22,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:22,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-03-15 16:35:22,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827432716] [2022-03-15 16:35:22,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:22,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:35:22,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:35:22,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:35:22,700 INFO L87 Difference]: Start difference. First operand 128 states and 266 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:23,399 INFO L93 Difference]: Finished difference Result 234 states and 474 transitions. [2022-03-15 16:35:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:35:23,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:35:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:23,400 INFO L225 Difference]: With dead ends: 234 [2022-03-15 16:35:23,400 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 16:35:23,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:35:23,401 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 166 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:23,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 89 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:35:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 16:35:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 128. [2022-03-15 16:35:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.094488188976378) internal successors, (266), 127 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-03-15 16:35:23,405 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-03-15 16:35:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:23,405 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-03-15 16:35:23,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-03-15 16:35:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:35:23,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:23,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:23,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:23,606 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 [2022-03-15 16:35:23,607 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1223751555, now seen corresponding path program 8 times [2022-03-15 16:35:23,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:23,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137010297] [2022-03-15 16:35:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:23,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:23,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137010297] [2022-03-15 16:35:23,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137010297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:23,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091691120] [2022-03-15 16:35:23,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:35:23,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:23,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:23,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:35:23,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:35:23,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:23,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:35:23,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:24,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:24,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091691120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:24,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:24,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 16:35:24,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106938958] [2022-03-15 16:35:24,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:24,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:35:24,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:24,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:35:24,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:35:24,607 INFO L87 Difference]: Start difference. First operand 128 states and 266 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:25,525 INFO L93 Difference]: Finished difference Result 294 states and 585 transitions. [2022-03-15 16:35:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:35:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:35:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:25,527 INFO L225 Difference]: With dead ends: 294 [2022-03-15 16:35:25,527 INFO L226 Difference]: Without dead ends: 236 [2022-03-15 16:35:25,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=2082, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:35:25,528 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 197 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:25,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 122 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:35:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-15 16:35:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 144. [2022-03-15 16:35:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.0839160839160837) internal successors, (298), 143 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 298 transitions. [2022-03-15 16:35:25,532 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 298 transitions. Word has length 22 [2022-03-15 16:35:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:25,532 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 298 transitions. [2022-03-15 16:35:25,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 298 transitions. [2022-03-15 16:35:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:35:25,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:25,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:25,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:25,734 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 [2022-03-15 16:35:25,734 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash -276952247, now seen corresponding path program 9 times [2022-03-15 16:35:25,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:25,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796886880] [2022-03-15 16:35:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:35:25,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:25,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796886880] [2022-03-15 16:35:25,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796886880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:25,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819019037] [2022-03-15 16:35:25,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:35:25,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:25,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:25,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:25,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:35:25,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:35:25,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:25,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:35:25,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:26,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:27,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819019037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:27,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:27,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-03-15 16:35:27,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301241015] [2022-03-15 16:35:27,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:27,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:35:27,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:27,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:35:27,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:35:27,024 INFO L87 Difference]: Start difference. First operand 144 states and 298 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:28,040 INFO L93 Difference]: Finished difference Result 270 states and 507 transitions. [2022-03-15 16:35:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:35:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 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 24 [2022-03-15 16:35:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:28,041 INFO L225 Difference]: With dead ends: 270 [2022-03-15 16:35:28,041 INFO L226 Difference]: Without dead ends: 220 [2022-03-15 16:35:28,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:35:28,042 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:28,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 234 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:35:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-15 16:35:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 163. [2022-03-15 16:35:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.037037037037037) internal successors, (330), 162 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 330 transitions. [2022-03-15 16:35:28,047 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 330 transitions. Word has length 24 [2022-03-15 16:35:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:28,047 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 330 transitions. [2022-03-15 16:35:28,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 330 transitions. [2022-03-15 16:35:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:35:28,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:28,048 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:28,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:28,248 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 [2022-03-15 16:35:28,249 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:28,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1905230277, now seen corresponding path program 10 times [2022-03-15 16:35:28,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:28,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115348691] [2022-03-15 16:35:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:35:28,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:28,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115348691] [2022-03-15 16:35:28,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115348691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:28,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379559694] [2022-03-15 16:35:28,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:35:28,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:28,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:28,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:28,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:35:28,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:35:28,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:28,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:35:28,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:29,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:29,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379559694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:29,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:29,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-03-15 16:35:29,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798466334] [2022-03-15 16:35:29,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:29,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:35:29,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:35:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:35:29,498 INFO L87 Difference]: Start difference. First operand 163 states and 330 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:30,812 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2022-03-15 16:35:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:35:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 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 24 [2022-03-15 16:35:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:30,814 INFO L225 Difference]: With dead ends: 270 [2022-03-15 16:35:30,814 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 16:35:30,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=797, Invalid=3493, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:35:30,816 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 221 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:30,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 164 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:35:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 16:35:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2022-03-15 16:35:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.03680981595092) internal successors, (332), 163 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 332 transitions. [2022-03-15 16:35:30,819 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 332 transitions. Word has length 24 [2022-03-15 16:35:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:30,820 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 332 transitions. [2022-03-15 16:35:30,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:30,820 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 332 transitions. [2022-03-15 16:35:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:35:30,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:30,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:30,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:31,034 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 [2022-03-15 16:35:31,034 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash 290399277, now seen corresponding path program 11 times [2022-03-15 16:35:31,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:31,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420079854] [2022-03-15 16:35:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:31,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:31,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:31,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420079854] [2022-03-15 16:35:31,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420079854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:31,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802463080] [2022-03-15 16:35:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:35:31,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:31,197 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:31,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:35:31,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:35:31,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:31,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:35:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:31,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:32,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802463080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:32,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:32,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-15 16:35:32,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714115007] [2022-03-15 16:35:32,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:32,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:35:32,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:35:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:35:32,624 INFO L87 Difference]: Start difference. First operand 164 states and 332 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:34,875 INFO L93 Difference]: Finished difference Result 366 states and 702 transitions. [2022-03-15 16:35:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:35:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 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 24 [2022-03-15 16:35:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:34,877 INFO L225 Difference]: With dead ends: 366 [2022-03-15 16:35:34,877 INFO L226 Difference]: Without dead ends: 288 [2022-03-15 16:35:34,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=744, Invalid=4086, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:35:34,879 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 283 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:34,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 195 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:35:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-15 16:35:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 192. [2022-03-15 16:35:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0418848167539267) internal successors, (390), 191 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 390 transitions. [2022-03-15 16:35:34,898 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 390 transitions. Word has length 24 [2022-03-15 16:35:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:34,898 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 390 transitions. [2022-03-15 16:35:34,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 390 transitions. [2022-03-15 16:35:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:35:34,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:34,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:34,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:35,099 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 [2022-03-15 16:35:35,099 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2130799989, now seen corresponding path program 12 times [2022-03-15 16:35:35,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:35,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514656059] [2022-03-15 16:35:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:35,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:35,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:35,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514656059] [2022-03-15 16:35:35,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514656059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:35,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186802489] [2022-03-15 16:35:35,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:35:35,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:35,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:35,252 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:35,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:35:35,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:35:35,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:35,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:35:35,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:35,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:36,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186802489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:36,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:36,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-15 16:35:36,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817270018] [2022-03-15 16:35:36,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:36,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:35:36,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:36,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:35:36,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:35:36,551 INFO L87 Difference]: Start difference. First operand 192 states and 390 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:37,174 INFO L93 Difference]: Finished difference Result 272 states and 544 transitions. [2022-03-15 16:35:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:35:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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 24 [2022-03-15 16:35:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:37,177 INFO L225 Difference]: With dead ends: 272 [2022-03-15 16:35:37,177 INFO L226 Difference]: Without dead ends: 246 [2022-03-15 16:35:37,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:35:37,178 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:37,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 91 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:35:37,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-15 16:35:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 165. [2022-03-15 16:35:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.048780487804878) internal successors, (336), 164 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 336 transitions. [2022-03-15 16:35:37,210 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 336 transitions. Word has length 24 [2022-03-15 16:35:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:37,210 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 336 transitions. [2022-03-15 16:35:37,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 336 transitions. [2022-03-15 16:35:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:35:37,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:37,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:37,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:37,428 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 [2022-03-15 16:35:37,429 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:37,429 INFO L85 PathProgramCache]: Analyzing trace with hash -144321993, now seen corresponding path program 13 times [2022-03-15 16:35:37,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:37,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237607602] [2022-03-15 16:35:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:37,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:37,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:37,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237607602] [2022-03-15 16:35:37,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237607602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:37,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052726251] [2022-03-15 16:35:37,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:35:37,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:37,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:37,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:37,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:35:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:35:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:38,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:38,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052726251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:38,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:38,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-15 16:35:38,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837147071] [2022-03-15 16:35:38,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:38,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:35:38,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:38,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:35:38,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:35:38,746 INFO L87 Difference]: Start difference. First operand 165 states and 336 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:42,178 INFO L93 Difference]: Finished difference Result 651 states and 1266 transitions. [2022-03-15 16:35:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:35:42,178 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:35:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:42,198 INFO L225 Difference]: With dead ends: 651 [2022-03-15 16:35:42,198 INFO L226 Difference]: Without dead ends: 586 [2022-03-15 16:35:42,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5895 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2834, Invalid=12666, Unknown=0, NotChecked=0, Total=15500 [2022-03-15 16:35:42,201 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 477 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:42,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 299 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:35:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-03-15 16:35:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 248. [2022-03-15 16:35:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.145748987854251) internal successors, (530), 247 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 530 transitions. [2022-03-15 16:35:42,208 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 530 transitions. Word has length 27 [2022-03-15 16:35:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:42,208 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 530 transitions. [2022-03-15 16:35:42,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 530 transitions. [2022-03-15 16:35:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:35:42,208 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:42,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:42,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:42,409 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 [2022-03-15 16:35:42,409 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash -193889737, now seen corresponding path program 14 times [2022-03-15 16:35:42,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:42,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283224210] [2022-03-15 16:35:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:42,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:42,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283224210] [2022-03-15 16:35:42,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283224210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:42,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357965983] [2022-03-15 16:35:42,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:35:42,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:42,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:42,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:42,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:35:42,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:35:42,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:42,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:35:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:42,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:43,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357965983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:43,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:43,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-03-15 16:35:43,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511277702] [2022-03-15 16:35:43,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:43,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:35:43,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:43,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:35:43,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:35:43,472 INFO L87 Difference]: Start difference. First operand 248 states and 530 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:47,340 INFO L93 Difference]: Finished difference Result 688 states and 1359 transitions. [2022-03-15 16:35:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-15 16:35:47,340 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:35:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:47,342 INFO L225 Difference]: With dead ends: 688 [2022-03-15 16:35:47,342 INFO L226 Difference]: Without dead ends: 623 [2022-03-15 16:35:47,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6815 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3106, Invalid=15526, Unknown=0, NotChecked=0, Total=18632 [2022-03-15 16:35:47,343 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 553 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:47,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 275 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:35:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-03-15 16:35:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 274. [2022-03-15 16:35:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1684981684981683) internal successors, (592), 273 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 592 transitions. [2022-03-15 16:35:47,350 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 592 transitions. Word has length 27 [2022-03-15 16:35:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:47,351 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 592 transitions. [2022-03-15 16:35:47,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 592 transitions. [2022-03-15 16:35:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:35:47,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:47,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:47,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:47,567 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 [2022-03-15 16:35:47,567 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1874386377, now seen corresponding path program 15 times [2022-03-15 16:35:47,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:47,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928115429] [2022-03-15 16:35:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:47,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:47,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928115429] [2022-03-15 16:35:47,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928115429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:47,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992122724] [2022-03-15 16:35:47,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:35:47,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:47,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:47,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:47,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:35:47,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:35:47,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:47,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:35:47,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:48,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:48,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992122724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:48,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:48,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-03-15 16:35:48,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160794430] [2022-03-15 16:35:48,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:48,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:35:48,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:35:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:35:48,509 INFO L87 Difference]: Start difference. First operand 274 states and 592 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:51,524 INFO L93 Difference]: Finished difference Result 717 states and 1446 transitions. [2022-03-15 16:35:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 16:35:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:35:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:51,526 INFO L225 Difference]: With dead ends: 717 [2022-03-15 16:35:51,526 INFO L226 Difference]: Without dead ends: 659 [2022-03-15 16:35:51,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6823 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3101, Invalid=15805, Unknown=0, NotChecked=0, Total=18906 [2022-03-15 16:35:51,527 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 614 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:51,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 261 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:35:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-15 16:35:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 305. [2022-03-15 16:35:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.2072368421052633) internal successors, (671), 304 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 671 transitions. [2022-03-15 16:35:51,534 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 671 transitions. Word has length 27 [2022-03-15 16:35:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:51,534 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 671 transitions. [2022-03-15 16:35:51,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 671 transitions. [2022-03-15 16:35:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:35:51,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:51,535 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:51,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 16:35:51,751 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 [2022-03-15 16:35:51,751 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:51,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash -177812937, now seen corresponding path program 16 times [2022-03-15 16:35:51,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:51,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259944688] [2022-03-15 16:35:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:51,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:51,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:51,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259944688] [2022-03-15 16:35:51,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259944688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:51,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680715721] [2022-03-15 16:35:51,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:35:51,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:51,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:51,899 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:51,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:35:51,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:35:51,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:35:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:52,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:52,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680715721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:52,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:52,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-03-15 16:35:52,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415929631] [2022-03-15 16:35:52,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:52,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:35:52,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:35:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:35:52,678 INFO L87 Difference]: Start difference. First operand 305 states and 671 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:58,020 INFO L93 Difference]: Finished difference Result 852 states and 1700 transitions. [2022-03-15 16:35:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-15 16:35:58,021 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:35:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:58,023 INFO L225 Difference]: With dead ends: 852 [2022-03-15 16:35:58,023 INFO L226 Difference]: Without dead ends: 750 [2022-03-15 16:35:58,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4461, Invalid=25295, Unknown=0, NotChecked=0, Total=29756 [2022-03-15 16:35:58,037 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 708 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:58,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 367 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:35:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-03-15 16:35:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 303. [2022-03-15 16:35:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.2019867549668874) internal successors, (665), 302 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 665 transitions. [2022-03-15 16:35:58,045 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 665 transitions. Word has length 27 [2022-03-15 16:35:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:58,045 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 665 transitions. [2022-03-15 16:35:58,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 665 transitions. [2022-03-15 16:35:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:35:58,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:58,046 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:58,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:58,259 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 [2022-03-15 16:35:58,260 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1711244881, now seen corresponding path program 17 times [2022-03-15 16:35:58,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:58,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727352239] [2022-03-15 16:35:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:58,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:58,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:58,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727352239] [2022-03-15 16:35:58,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727352239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:58,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981051764] [2022-03-15 16:35:58,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:35:58,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:58,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:58,477 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:58,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:35:58,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:35:58,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:58,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:35:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:58,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:59,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981051764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:59,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:59,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-03-15 16:35:59,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356934911] [2022-03-15 16:35:59,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:59,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:35:59,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:35:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:35:59,379 INFO L87 Difference]: Start difference. First operand 303 states and 665 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:02,801 INFO L93 Difference]: Finished difference Result 798 states and 1598 transitions. [2022-03-15 16:36:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 16:36:02,802 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:02,803 INFO L225 Difference]: With dead ends: 798 [2022-03-15 16:36:02,803 INFO L226 Difference]: Without dead ends: 682 [2022-03-15 16:36:02,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2627, Invalid=13885, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 16:36:02,805 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 647 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:02,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 268 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:36:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-15 16:36:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 333. [2022-03-15 16:36:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.213855421686747) internal successors, (735), 332 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-03-15 16:36:02,811 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-03-15 16:36:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:02,811 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-03-15 16:36:02,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-03-15 16:36:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:02,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:02,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:02,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:03,027 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 [2022-03-15 16:36:03,028 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1426612203, now seen corresponding path program 18 times [2022-03-15 16:36:03,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:03,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744342574] [2022-03-15 16:36:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:03,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:03,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:03,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744342574] [2022-03-15 16:36:03,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744342574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:03,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534329802] [2022-03-15 16:36:03,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:03,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:03,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:03,188 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:03,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:36:03,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:36:03,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:36:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:03,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:04,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534329802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:04,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:04,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-15 16:36:04,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011067322] [2022-03-15 16:36:04,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:04,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:36:04,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:36:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:36:04,148 INFO L87 Difference]: Start difference. First operand 333 states and 735 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:06,372 INFO L93 Difference]: Finished difference Result 716 states and 1447 transitions. [2022-03-15 16:36:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 16:36:06,372 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:06,376 INFO L225 Difference]: With dead ends: 716 [2022-03-15 16:36:06,376 INFO L226 Difference]: Without dead ends: 620 [2022-03-15 16:36:06,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3779 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1995, Invalid=9135, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 16:36:06,376 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 466 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:06,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 236 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:36:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-03-15 16:36:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 333. [2022-03-15 16:36:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.213855421686747) internal successors, (735), 332 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-03-15 16:36:06,400 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-03-15 16:36:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:06,400 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-03-15 16:36:06,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-03-15 16:36:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:06,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:06,400 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:06,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:06,615 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 [2022-03-15 16:36:06,616 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:06,616 INFO L85 PathProgramCache]: Analyzing trace with hash 648255859, now seen corresponding path program 19 times [2022-03-15 16:36:06,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:06,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915680575] [2022-03-15 16:36:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:06,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:06,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:06,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915680575] [2022-03-15 16:36:06,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915680575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:06,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311392713] [2022-03-15 16:36:06,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:36:06,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:06,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:06,803 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:06,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:36:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:36:06,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:07,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:07,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311392713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:07,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:07,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-03-15 16:36:07,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914353851] [2022-03-15 16:36:07,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:07,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:36:07,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:36:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:36:07,816 INFO L87 Difference]: Start difference. First operand 333 states and 735 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:10,849 INFO L93 Difference]: Finished difference Result 829 states and 1722 transitions. [2022-03-15 16:36:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 16:36:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:10,852 INFO L225 Difference]: With dead ends: 829 [2022-03-15 16:36:10,852 INFO L226 Difference]: Without dead ends: 764 [2022-03-15 16:36:10,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2169, Invalid=10263, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 16:36:10,853 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 475 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:10,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 273 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:36:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-03-15 16:36:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 413. [2022-03-15 16:36:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.25) internal successors, (927), 412 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 927 transitions. [2022-03-15 16:36:10,872 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 927 transitions. Word has length 27 [2022-03-15 16:36:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:10,873 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 927 transitions. [2022-03-15 16:36:10,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 927 transitions. [2022-03-15 16:36:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:10,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:10,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:10,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:11,090 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 [2022-03-15 16:36:11,091 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:11,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1950137997, now seen corresponding path program 20 times [2022-03-15 16:36:11,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:11,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980094430] [2022-03-15 16:36:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:11,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:11,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:11,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980094430] [2022-03-15 16:36:11,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980094430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:11,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650401897] [2022-03-15 16:36:11,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:11,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:11,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:11,296 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:11,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:36:11,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:36:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:11,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:12,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650401897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:12,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:12,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-03-15 16:36:12,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696354034] [2022-03-15 16:36:12,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:12,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:36:12,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:36:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:36:12,166 INFO L87 Difference]: Start difference. First operand 413 states and 927 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:16,412 INFO L93 Difference]: Finished difference Result 887 states and 1850 transitions. [2022-03-15 16:36:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-15 16:36:16,412 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:16,414 INFO L225 Difference]: With dead ends: 887 [2022-03-15 16:36:16,415 INFO L226 Difference]: Without dead ends: 771 [2022-03-15 16:36:16,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6515 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3071, Invalid=15835, Unknown=0, NotChecked=0, Total=18906 [2022-03-15 16:36:16,416 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 633 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:16,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 224 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:36:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-15 16:36:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 423. [2022-03-15 16:36:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.2369668246445498) internal successors, (944), 422 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 944 transitions. [2022-03-15 16:36:16,424 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 944 transitions. Word has length 27 [2022-03-15 16:36:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:16,424 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 944 transitions. [2022-03-15 16:36:16,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:16,424 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 944 transitions. [2022-03-15 16:36:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:16,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:16,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:16,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-15 16:36:16,640 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 [2022-03-15 16:36:16,640 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1187719087, now seen corresponding path program 21 times [2022-03-15 16:36:16,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:16,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930524581] [2022-03-15 16:36:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:16,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:16,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930524581] [2022-03-15 16:36:16,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930524581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:16,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236003096] [2022-03-15 16:36:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:36:16,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:16,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:16,777 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:16,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:36:16,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:36:16,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:16,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:36:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:17,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:17,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236003096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:17,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:17,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-15 16:36:17,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288329423] [2022-03-15 16:36:17,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:17,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:36:17,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:17,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:36:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:36:17,655 INFO L87 Difference]: Start difference. First operand 423 states and 944 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:20,595 INFO L93 Difference]: Finished difference Result 816 states and 1693 transitions. [2022-03-15 16:36:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:36:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:20,598 INFO L225 Difference]: With dead ends: 816 [2022-03-15 16:36:20,598 INFO L226 Difference]: Without dead ends: 720 [2022-03-15 16:36:20,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2270, Invalid=9940, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 16:36:20,599 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 452 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:20,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 235 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:36:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-03-15 16:36:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 377. [2022-03-15 16:36:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.223404255319149) internal successors, (836), 376 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 836 transitions. [2022-03-15 16:36:20,606 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 836 transitions. Word has length 27 [2022-03-15 16:36:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:20,606 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 836 transitions. [2022-03-15 16:36:20,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 836 transitions. [2022-03-15 16:36:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:20,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:20,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:20,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:20,822 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 [2022-03-15 16:36:20,823 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:20,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:20,823 INFO L85 PathProgramCache]: Analyzing trace with hash -144371597, now seen corresponding path program 22 times [2022-03-15 16:36:20,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:20,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726995363] [2022-03-15 16:36:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:20,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:20,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726995363] [2022-03-15 16:36:20,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726995363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:20,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415805473] [2022-03-15 16:36:20,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:36:20,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:20,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:20,991 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:20,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:36:21,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:36:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:21,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:36:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:21,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:22,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415805473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:22,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:22,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-15 16:36:22,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601642833] [2022-03-15 16:36:22,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:22,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:36:22,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:36:22,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:36:22,176 INFO L87 Difference]: Start difference. First operand 377 states and 836 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:27,090 INFO L93 Difference]: Finished difference Result 932 states and 1908 transitions. [2022-03-15 16:36:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 16:36:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:27,093 INFO L225 Difference]: With dead ends: 932 [2022-03-15 16:36:27,093 INFO L226 Difference]: Without dead ends: 836 [2022-03-15 16:36:27,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5616 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3006, Invalid=13250, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 16:36:27,094 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 517 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:27,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 265 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:36:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-03-15 16:36:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 422. [2022-03-15 16:36:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.2327790973871733) internal successors, (940), 421 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 940 transitions. [2022-03-15 16:36:27,111 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 940 transitions. Word has length 27 [2022-03-15 16:36:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:27,111 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 940 transitions. [2022-03-15 16:36:27,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 940 transitions. [2022-03-15 16:36:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:27,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:27,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:27,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 16:36:27,327 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 [2022-03-15 16:36:27,327 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1153733039, now seen corresponding path program 23 times [2022-03-15 16:36:27,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:27,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349441093] [2022-03-15 16:36:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:27,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:27,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:27,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349441093] [2022-03-15 16:36:27,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349441093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:27,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176140896] [2022-03-15 16:36:27,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:36:27,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:27,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:27,477 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:27,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:36:27,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:36:27,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:36:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:27,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:28,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176140896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:28,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:28,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-03-15 16:36:28,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993018665] [2022-03-15 16:36:28,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:28,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:36:28,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:36:28,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:36:28,852 INFO L87 Difference]: Start difference. First operand 422 states and 940 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:34,978 INFO L93 Difference]: Finished difference Result 1266 states and 2595 transitions. [2022-03-15 16:36:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-15 16:36:34,979 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:34,982 INFO L225 Difference]: With dead ends: 1266 [2022-03-15 16:36:34,982 INFO L226 Difference]: Without dead ends: 1245 [2022-03-15 16:36:34,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6389 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3474, Invalid=14082, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 16:36:34,983 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 537 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:34,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 337 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:36:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-03-15 16:36:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 543. [2022-03-15 16:36:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.274907749077491) internal successors, (1233), 542 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1233 transitions. [2022-03-15 16:36:34,998 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1233 transitions. Word has length 27 [2022-03-15 16:36:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:34,999 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1233 transitions. [2022-03-15 16:36:34,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1233 transitions. [2022-03-15 16:36:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:35,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:35,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:35,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:35,206 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 [2022-03-15 16:36:35,207 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1444660817, now seen corresponding path program 24 times [2022-03-15 16:36:35,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:35,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66501251] [2022-03-15 16:36:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:35,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:35,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66501251] [2022-03-15 16:36:35,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66501251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:35,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513777720] [2022-03-15 16:36:35,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:35,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:35,379 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:35,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:36:35,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:36:35,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:35,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:36:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:35,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:36,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513777720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:36,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:36,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-15 16:36:36,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792337923] [2022-03-15 16:36:36,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:36,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:36:36,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:36:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:36:36,601 INFO L87 Difference]: Start difference. First operand 543 states and 1233 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:43,746 INFO L93 Difference]: Finished difference Result 1451 states and 3008 transitions. [2022-03-15 16:36:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-15 16:36:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:43,750 INFO L225 Difference]: With dead ends: 1451 [2022-03-15 16:36:43,750 INFO L226 Difference]: Without dead ends: 1380 [2022-03-15 16:36:43,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12620 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5319, Invalid=27261, Unknown=0, NotChecked=0, Total=32580 [2022-03-15 16:36:43,752 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 594 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:43,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 471 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:36:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-03-15 16:36:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 579. [2022-03-15 16:36:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.282006920415225) internal successors, (1319), 578 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1319 transitions. [2022-03-15 16:36:43,766 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1319 transitions. Word has length 27 [2022-03-15 16:36:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:43,766 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1319 transitions. [2022-03-15 16:36:43,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1319 transitions. [2022-03-15 16:36:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:43,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:43,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:43,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:43,983 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 [2022-03-15 16:36:43,984 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1693196267, now seen corresponding path program 25 times [2022-03-15 16:36:43,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:43,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341988387] [2022-03-15 16:36:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:43,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:44,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:44,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341988387] [2022-03-15 16:36:44,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341988387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:44,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924769255] [2022-03-15 16:36:44,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:36:44,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:44,137 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:44,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:36:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:44,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:36:44,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:44,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:45,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924769255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:45,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:45,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-03-15 16:36:45,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312584664] [2022-03-15 16:36:45,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:45,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:36:45,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:36:45,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:36:45,116 INFO L87 Difference]: Start difference. First operand 579 states and 1319 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:51,989 INFO L93 Difference]: Finished difference Result 1709 states and 3584 transitions. [2022-03-15 16:36:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-15 16:36:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:51,994 INFO L225 Difference]: With dead ends: 1709 [2022-03-15 16:36:51,994 INFO L226 Difference]: Without dead ends: 1641 [2022-03-15 16:36:51,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12214 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5391, Invalid=25409, Unknown=0, NotChecked=0, Total=30800 [2022-03-15 16:36:51,996 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 561 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:51,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 446 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:36:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-03-15 16:36:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 724. [2022-03-15 16:36:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.2835408022130013) internal successors, (1651), 723 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1651 transitions. [2022-03-15 16:36:52,011 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1651 transitions. Word has length 27 [2022-03-15 16:36:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:52,011 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1651 transitions. [2022-03-15 16:36:52,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1651 transitions. [2022-03-15 16:36:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:52,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:52,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:52,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:52,227 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 [2022-03-15 16:36:52,227 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1820958903, now seen corresponding path program 26 times [2022-03-15 16:36:52,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:52,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215701156] [2022-03-15 16:36:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:52,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:52,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:52,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215701156] [2022-03-15 16:36:52,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215701156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:52,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320457797] [2022-03-15 16:36:52,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:52,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:52,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:52,387 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:52,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:36:52,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:52,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:52,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:36:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:52,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:53,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320457797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:53,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:53,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-03-15 16:36:53,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718576421] [2022-03-15 16:36:53,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:53,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:36:53,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:36:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:36:53,424 INFO L87 Difference]: Start difference. First operand 724 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:56,508 INFO L93 Difference]: Finished difference Result 1358 states and 2916 transitions. [2022-03-15 16:36:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 16:36:56,509 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:56,512 INFO L225 Difference]: With dead ends: 1358 [2022-03-15 16:36:56,512 INFO L226 Difference]: Without dead ends: 1293 [2022-03-15 16:36:56,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 16:36:56,513 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 463 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:56,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 302 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:36:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-03-15 16:36:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 833. [2022-03-15 16:36:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.293269230769231) internal successors, (1908), 832 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1908 transitions. [2022-03-15 16:36:56,551 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1908 transitions. Word has length 27 [2022-03-15 16:36:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:56,551 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1908 transitions. [2022-03-15 16:36:56,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1908 transitions. [2022-03-15 16:36:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:56,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:56,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:56,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:56,770 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 [2022-03-15 16:36:56,770 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:56,770 INFO L85 PathProgramCache]: Analyzing trace with hash 140462263, now seen corresponding path program 27 times [2022-03-15 16:36:56,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:56,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887597079] [2022-03-15 16:36:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:56,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:56,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:56,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887597079] [2022-03-15 16:36:56,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887597079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:56,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743103431] [2022-03-15 16:36:56,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:36:56,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:56,893 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:56,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:36:56,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:36:56,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:56,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:36:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:57,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:57,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743103431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:57,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:57,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-15 16:36:57,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524689071] [2022-03-15 16:36:57,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:36:57,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:36:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:36:57,664 INFO L87 Difference]: Start difference. First operand 833 states and 1908 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:59,784 INFO L93 Difference]: Finished difference Result 1227 states and 2641 transitions. [2022-03-15 16:36:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:36:59,784 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:36:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:59,787 INFO L225 Difference]: With dead ends: 1227 [2022-03-15 16:36:59,787 INFO L226 Difference]: Without dead ends: 1213 [2022-03-15 16:36:59,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1752, Invalid=8348, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 16:36:59,789 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 502 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:59,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 219 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:36:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-03-15 16:36:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 859. [2022-03-15 16:36:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.296037296037296) internal successors, (1970), 858 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1970 transitions. [2022-03-15 16:36:59,801 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1970 transitions. Word has length 27 [2022-03-15 16:36:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:59,801 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1970 transitions. [2022-03-15 16:36:59,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1970 transitions. [2022-03-15 16:36:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:36:59,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:59,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:59,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:00,019 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 [2022-03-15 16:37:00,019 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1837035703, now seen corresponding path program 28 times [2022-03-15 16:37:00,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:00,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780670809] [2022-03-15 16:37:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:00,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:00,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:00,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780670809] [2022-03-15 16:37:00,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780670809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:00,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729955257] [2022-03-15 16:37:00,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:00,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:00,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:00,199 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:00,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:37:00,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:00,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:37:00,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:00,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729955257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:01,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:01,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-15 16:37:01,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310233265] [2022-03-15 16:37:01,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:01,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:37:01,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:01,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:37:01,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:37:01,306 INFO L87 Difference]: Start difference. First operand 859 states and 1970 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:06,041 INFO L93 Difference]: Finished difference Result 1463 states and 3165 transitions. [2022-03-15 16:37:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-15 16:37:06,042 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:06,046 INFO L225 Difference]: With dead ends: 1463 [2022-03-15 16:37:06,046 INFO L226 Difference]: Without dead ends: 1361 [2022-03-15 16:37:06,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6445 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2835, Invalid=14987, Unknown=0, NotChecked=0, Total=17822 [2022-03-15 16:37:06,048 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 686 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:06,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 297 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:37:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-03-15 16:37:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 857. [2022-03-15 16:37:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.294392523364486) internal successors, (1964), 856 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1964 transitions. [2022-03-15 16:37:06,078 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1964 transitions. Word has length 27 [2022-03-15 16:37:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:06,079 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1964 transitions. [2022-03-15 16:37:06,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1964 transitions. [2022-03-15 16:37:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:06,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:06,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:06,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:06,295 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 [2022-03-15 16:37:06,295 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:06,296 INFO L85 PathProgramCache]: Analyzing trace with hash -778012489, now seen corresponding path program 29 times [2022-03-15 16:37:06,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:06,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60955877] [2022-03-15 16:37:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:06,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:06,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:06,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60955877] [2022-03-15 16:37:06,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60955877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:06,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961548228] [2022-03-15 16:37:06,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:06,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:06,439 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:06,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:37:06,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:37:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:37:06,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:06,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:07,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961548228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:07,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:07,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-03-15 16:37:07,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386062250] [2022-03-15 16:37:07,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:07,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:37:07,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:37:07,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:37:07,362 INFO L87 Difference]: Start difference. First operand 857 states and 1964 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:10,508 INFO L93 Difference]: Finished difference Result 1458 states and 3123 transitions. [2022-03-15 16:37:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:37:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:10,512 INFO L225 Difference]: With dead ends: 1458 [2022-03-15 16:37:10,512 INFO L226 Difference]: Without dead ends: 1400 [2022-03-15 16:37:10,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1851, Invalid=8451, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 16:37:10,514 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 366 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:10,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 262 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:37:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-03-15 16:37:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 888. [2022-03-15 16:37:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.2953776775648254) internal successors, (2036), 887 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2036 transitions. [2022-03-15 16:37:10,530 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2036 transitions. Word has length 27 [2022-03-15 16:37:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:10,530 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2036 transitions. [2022-03-15 16:37:10,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2036 transitions. [2022-03-15 16:37:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:10,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:10,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:10,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:10,735 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 [2022-03-15 16:37:10,736 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash 918560951, now seen corresponding path program 30 times [2022-03-15 16:37:10,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:10,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843263613] [2022-03-15 16:37:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:10,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:10,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:10,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843263613] [2022-03-15 16:37:10,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843263613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:10,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240108984] [2022-03-15 16:37:10,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:10,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:10,909 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:10,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:37:10,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:37:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:37:10,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:11,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:12,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240108984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:12,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:12,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-15 16:37:12,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360876405] [2022-03-15 16:37:12,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:12,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:37:12,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:37:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:37:12,139 INFO L87 Difference]: Start difference. First operand 888 states and 2036 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:15,595 INFO L93 Difference]: Finished difference Result 1565 states and 3427 transitions. [2022-03-15 16:37:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:37:15,595 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:15,599 INFO L225 Difference]: With dead ends: 1565 [2022-03-15 16:37:15,599 INFO L226 Difference]: Without dead ends: 1463 [2022-03-15 16:37:15,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5381 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2608, Invalid=13394, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 16:37:15,600 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 607 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:15,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 219 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:37:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-03-15 16:37:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 915. [2022-03-15 16:37:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.2964989059080962) internal successors, (2099), 914 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2099 transitions. [2022-03-15 16:37:15,614 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2099 transitions. Word has length 27 [2022-03-15 16:37:15,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:15,615 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2099 transitions. [2022-03-15 16:37:15,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:15,615 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2099 transitions. [2022-03-15 16:37:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:15,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:15,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:15,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 16:37:15,836 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 [2022-03-15 16:37:15,837 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash -238549261, now seen corresponding path program 31 times [2022-03-15 16:37:15,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:15,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869202320] [2022-03-15 16:37:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:15,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:16,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:16,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869202320] [2022-03-15 16:37:16,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869202320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:16,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143914862] [2022-03-15 16:37:16,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:16,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:16,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:16,013 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:16,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:37:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:37:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:16,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:16,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143914862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:16,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:16,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-03-15 16:37:16,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157043199] [2022-03-15 16:37:16,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:16,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:37:16,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:37:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:37:16,931 INFO L87 Difference]: Start difference. First operand 915 states and 2099 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:19,906 INFO L93 Difference]: Finished difference Result 1839 states and 4025 transitions. [2022-03-15 16:37:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 16:37:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:19,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:19,910 INFO L225 Difference]: With dead ends: 1839 [2022-03-15 16:37:19,910 INFO L226 Difference]: Without dead ends: 1743 [2022-03-15 16:37:19,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2389, Invalid=10721, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 16:37:19,910 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 458 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:19,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 253 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:37:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-03-15 16:37:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 932. [2022-03-15 16:37:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.297529538131042) internal successors, (2139), 931 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2139 transitions. [2022-03-15 16:37:19,925 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2139 transitions. Word has length 27 [2022-03-15 16:37:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:19,925 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 2139 transitions. [2022-03-15 16:37:19,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2139 transitions. [2022-03-15 16:37:19,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:19,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:19,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:19,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:20,134 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 [2022-03-15 16:37:20,134 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash -198928785, now seen corresponding path program 32 times [2022-03-15 16:37:20,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:20,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988313348] [2022-03-15 16:37:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:20,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:20,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988313348] [2022-03-15 16:37:20,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988313348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:20,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490724543] [2022-03-15 16:37:20,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:20,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:20,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:20,286 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:20,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:37:20,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:20,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:20,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:37:20,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:20,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:21,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490724543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:21,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:21,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-15 16:37:21,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158519055] [2022-03-15 16:37:21,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:21,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:37:21,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:21,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:37:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:37:21,492 INFO L87 Difference]: Start difference. First operand 932 states and 2139 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:26,167 INFO L93 Difference]: Finished difference Result 1851 states and 3994 transitions. [2022-03-15 16:37:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-15 16:37:26,167 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:26,174 INFO L225 Difference]: With dead ends: 1851 [2022-03-15 16:37:26,174 INFO L226 Difference]: Without dead ends: 1783 [2022-03-15 16:37:26,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6079 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2998, Invalid=14558, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 16:37:26,176 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 542 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:26,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 459 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:37:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-03-15 16:37:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1050. [2022-03-15 16:37:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.3040991420400383) internal successors, (2417), 1049 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2417 transitions. [2022-03-15 16:37:26,202 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2417 transitions. Word has length 27 [2022-03-15 16:37:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:26,202 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2417 transitions. [2022-03-15 16:37:26,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2417 transitions. [2022-03-15 16:37:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:26,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:26,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:26,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:26,419 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 [2022-03-15 16:37:26,419 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:26,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1880365043, now seen corresponding path program 33 times [2022-03-15 16:37:26,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:26,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020053137] [2022-03-15 16:37:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:26,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:26,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:26,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020053137] [2022-03-15 16:37:26,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020053137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:26,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124031068] [2022-03-15 16:37:26,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:26,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:26,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:26,539 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:26,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:37:26,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:37:26,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:37:26,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:26,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:27,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124031068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:27,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:27,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-15 16:37:27,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27013633] [2022-03-15 16:37:27,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:27,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:37:27,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:27,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:37:27,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:37:27,479 INFO L87 Difference]: Start difference. First operand 1050 states and 2417 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:32,217 INFO L93 Difference]: Finished difference Result 1673 states and 3668 transitions. [2022-03-15 16:37:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-15 16:37:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:32,220 INFO L225 Difference]: With dead ends: 1673 [2022-03-15 16:37:32,220 INFO L226 Difference]: Without dead ends: 1653 [2022-03-15 16:37:32,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3318, Invalid=15864, Unknown=0, NotChecked=0, Total=19182 [2022-03-15 16:37:32,221 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 491 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:32,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 369 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:37:32,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-03-15 16:37:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1055. [2022-03-15 16:37:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3026565464895636) internal successors, (2427), 1054 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2427 transitions. [2022-03-15 16:37:32,235 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2427 transitions. Word has length 27 [2022-03-15 16:37:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:32,235 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 2427 transitions. [2022-03-15 16:37:32,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2427 transitions. [2022-03-15 16:37:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:32,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:32,236 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:32,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:32,449 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 [2022-03-15 16:37:32,449 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:32,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1651423031, now seen corresponding path program 34 times [2022-03-15 16:37:32,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:32,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92329901] [2022-03-15 16:37:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:32,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:32,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:32,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92329901] [2022-03-15 16:37:32,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92329901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:32,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673435030] [2022-03-15 16:37:32,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:32,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:32,620 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:32,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:37:32,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:32,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:32,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:37:32,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:33,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:33,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673435030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:33,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:33,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-03-15 16:37:33,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628418086] [2022-03-15 16:37:33,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:33,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:37:33,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:33,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:37:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:37:33,776 INFO L87 Difference]: Start difference. First operand 1055 states and 2427 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:37,308 INFO L93 Difference]: Finished difference Result 1976 states and 4378 transitions. [2022-03-15 16:37:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 16:37:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:37,311 INFO L225 Difference]: With dead ends: 1976 [2022-03-15 16:37:37,311 INFO L226 Difference]: Without dead ends: 1956 [2022-03-15 16:37:37,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2716, Invalid=13286, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 16:37:37,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:37,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 402 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:37:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-03-15 16:37:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1050. [2022-03-15 16:37:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.296472831267874) internal successors, (2409), 1049 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2409 transitions. [2022-03-15 16:37:37,327 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2409 transitions. Word has length 27 [2022-03-15 16:37:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:37,328 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2409 transitions. [2022-03-15 16:37:37,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2409 transitions. [2022-03-15 16:37:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:37,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:37,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:37,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:37,545 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 [2022-03-15 16:37:37,545 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1716949619, now seen corresponding path program 35 times [2022-03-15 16:37:37,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:37,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042744456] [2022-03-15 16:37:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:37,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:37,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:37,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042744456] [2022-03-15 16:37:37,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042744456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:37,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152262903] [2022-03-15 16:37:37,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:37,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:37,709 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:37,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:37:37,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:37:37,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:37,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:37:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:38,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:38,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152262903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:38,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:38,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-15 16:37:38,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108721838] [2022-03-15 16:37:38,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:38,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:37:38,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:37:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:37:38,749 INFO L87 Difference]: Start difference. First operand 1050 states and 2409 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:42,456 INFO L93 Difference]: Finished difference Result 1991 states and 4278 transitions. [2022-03-15 16:37:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 16:37:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:42,460 INFO L225 Difference]: With dead ends: 1991 [2022-03-15 16:37:42,460 INFO L226 Difference]: Without dead ends: 1916 [2022-03-15 16:37:42,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2234, Invalid=10198, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 16:37:42,461 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 488 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:42,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 482 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:37:42,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-03-15 16:37:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1300. [2022-03-15 16:37:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.311008468052348) internal successors, (3002), 1299 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3002 transitions. [2022-03-15 16:37:42,478 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3002 transitions. Word has length 27 [2022-03-15 16:37:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:42,478 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3002 transitions. [2022-03-15 16:37:42,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3002 transitions. [2022-03-15 16:37:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:42,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:42,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:42,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 16:37:42,686 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 [2022-03-15 16:37:42,686 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:42,686 INFO L85 PathProgramCache]: Analyzing trace with hash 36452979, now seen corresponding path program 36 times [2022-03-15 16:37:42,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:42,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568658863] [2022-03-15 16:37:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:42,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:42,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:42,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568658863] [2022-03-15 16:37:42,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568658863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:42,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489007560] [2022-03-15 16:37:42,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:42,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:42,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:42,922 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:42,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:37:42,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:37:42,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:37:42,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:43,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:44,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489007560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:44,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:44,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-15 16:37:44,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606988031] [2022-03-15 16:37:44,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:44,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:37:44,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:44,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:37:44,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:37:44,025 INFO L87 Difference]: Start difference. First operand 1300 states and 3002 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:47,344 INFO L93 Difference]: Finished difference Result 2024 states and 4411 transitions. [2022-03-15 16:37:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 16:37:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:47,347 INFO L225 Difference]: With dead ends: 2024 [2022-03-15 16:37:47,347 INFO L226 Difference]: Without dead ends: 1956 [2022-03-15 16:37:47,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6231 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2873, Invalid=14683, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 16:37:47,348 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 583 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:47,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 469 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:37:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-03-15 16:37:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1238. [2022-03-15 16:37:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.320129345189976) internal successors, (2870), 1237 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2870 transitions. [2022-03-15 16:37:47,365 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2870 transitions. Word has length 27 [2022-03-15 16:37:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:47,365 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2870 transitions. [2022-03-15 16:37:47,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2870 transitions. [2022-03-15 16:37:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:47,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:47,367 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:47,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:47,582 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 [2022-03-15 16:37:47,582 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:47,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1733026419, now seen corresponding path program 37 times [2022-03-15 16:37:47,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:47,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370874311] [2022-03-15 16:37:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:47,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:47,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370874311] [2022-03-15 16:37:47,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370874311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:47,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437265324] [2022-03-15 16:37:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:47,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:47,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:47,716 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:47,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:37:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:37:47,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:48,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:48,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437265324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:48,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:48,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-03-15 16:37:48,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135036422] [2022-03-15 16:37:48,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:48,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:37:48,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:37:48,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:37:48,664 INFO L87 Difference]: Start difference. First operand 1238 states and 2870 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:53,685 INFO L93 Difference]: Finished difference Result 2027 states and 4488 transitions. [2022-03-15 16:37:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-15 16:37:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:53,689 INFO L225 Difference]: With dead ends: 2027 [2022-03-15 16:37:53,689 INFO L226 Difference]: Without dead ends: 1956 [2022-03-15 16:37:53,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7003 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3164, Invalid=16576, Unknown=0, NotChecked=0, Total=19740 [2022-03-15 16:37:53,691 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 589 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:53,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 376 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:37:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-03-15 16:37:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1210. [2022-03-15 16:37:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 2.3118279569892475) internal successors, (2795), 1209 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2795 transitions. [2022-03-15 16:37:53,733 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2795 transitions. Word has length 27 [2022-03-15 16:37:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:53,733 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 2795 transitions. [2022-03-15 16:37:53,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2795 transitions. [2022-03-15 16:37:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:53,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:53,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:53,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:53,963 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 [2022-03-15 16:37:53,964 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 989532139, now seen corresponding path program 38 times [2022-03-15 16:37:53,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:53,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097380321] [2022-03-15 16:37:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:53,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:54,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:54,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097380321] [2022-03-15 16:37:54,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097380321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:54,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488866138] [2022-03-15 16:37:54,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:54,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:54,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:54,143 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:54,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:37:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:54,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:37:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:54,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:55,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488866138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:55,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:55,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 16:37:55,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473590894] [2022-03-15 16:37:55,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:55,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:37:55,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:37:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:37:55,254 INFO L87 Difference]: Start difference. First operand 1210 states and 2795 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:58,241 INFO L93 Difference]: Finished difference Result 1819 states and 4016 transitions. [2022-03-15 16:37:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 16:37:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 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 27 [2022-03-15 16:37:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:58,245 INFO L225 Difference]: With dead ends: 1819 [2022-03-15 16:37:58,245 INFO L226 Difference]: Without dead ends: 1761 [2022-03-15 16:37:58,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1688, Invalid=6868, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:37:58,246 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 406 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:58,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 413 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:37:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-03-15 16:37:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1251. [2022-03-15 16:37:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.3112) internal successors, (2889), 1250 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2889 transitions. [2022-03-15 16:37:58,262 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2889 transitions. Word has length 27 [2022-03-15 16:37:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:58,262 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 2889 transitions. [2022-03-15 16:37:58,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2889 transitions. [2022-03-15 16:37:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:58,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:58,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:58,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 16:37:58,490 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 [2022-03-15 16:37:58,490 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:58,490 INFO L85 PathProgramCache]: Analyzing trace with hash -342558545, now seen corresponding path program 39 times [2022-03-15 16:37:58,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:58,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583255109] [2022-03-15 16:37:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:58,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:58,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:58,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583255109] [2022-03-15 16:37:58,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583255109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:58,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559324061] [2022-03-15 16:37:58,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:58,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:58,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:58,659 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:58,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:37:58,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:37:58,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:58,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:37:58,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:59,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:59,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559324061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:59,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:59,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-03-15 16:37:59,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425508585] [2022-03-15 16:37:59,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:59,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:37:59,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:37:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:37:59,725 INFO L87 Difference]: Start difference. First operand 1251 states and 2889 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:04,329 INFO L93 Difference]: Finished difference Result 2034 states and 4490 transitions. [2022-03-15 16:38:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:38:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:38:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:04,332 INFO L225 Difference]: With dead ends: 2034 [2022-03-15 16:38:04,332 INFO L226 Difference]: Without dead ends: 1966 [2022-03-15 16:38:04,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5137 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2605, Invalid=12401, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 16:38:04,333 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:04,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 300 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:38:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-03-15 16:38:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1192. [2022-03-15 16:38:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.311502938706969) internal successors, (2753), 1191 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2753 transitions. [2022-03-15 16:38:04,355 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2753 transitions. Word has length 27 [2022-03-15 16:38:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:04,355 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 2753 transitions. [2022-03-15 16:38:04,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2753 transitions. [2022-03-15 16:38:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:04,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:04,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:04,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:04,571 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 [2022-03-15 16:38:04,571 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:04,572 INFO L85 PathProgramCache]: Analyzing trace with hash 56938553, now seen corresponding path program 40 times [2022-03-15 16:38:04,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:04,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735631259] [2022-03-15 16:38:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:04,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 16:38:04,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:04,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735631259] [2022-03-15 16:38:04,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735631259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:04,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487394190] [2022-03-15 16:38:04,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:38:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:04,740 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:04,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:38:04,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:04,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:04,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:38:04,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:05,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:06,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487394190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:06,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:06,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-03-15 16:38:06,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579744312] [2022-03-15 16:38:06,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:06,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:38:06,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:38:06,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:38:06,281 INFO L87 Difference]: Start difference. First operand 1192 states and 2753 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:09,488 INFO L93 Difference]: Finished difference Result 2673 states and 6185 transitions. [2022-03-15 16:38:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:38:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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 29 [2022-03-15 16:38:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:09,491 INFO L225 Difference]: With dead ends: 2673 [2022-03-15 16:38:09,491 INFO L226 Difference]: Without dead ends: 2542 [2022-03-15 16:38:09,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1411, Invalid=7145, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:38:09,492 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 295 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:09,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 230 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:38:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-03-15 16:38:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 595. [2022-03-15 16:38:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0336700336700337) internal successors, (1208), 594 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1208 transitions. [2022-03-15 16:38:09,503 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1208 transitions. Word has length 29 [2022-03-15 16:38:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:09,503 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1208 transitions. [2022-03-15 16:38:09,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1208 transitions. [2022-03-15 16:38:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:09,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:09,504 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:09,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 16:38:09,719 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 [2022-03-15 16:38:09,719 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:09,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1849159349, now seen corresponding path program 41 times [2022-03-15 16:38:09,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:09,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623136908] [2022-03-15 16:38:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:09,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 16:38:09,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:09,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623136908] [2022-03-15 16:38:09,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623136908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:09,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377284813] [2022-03-15 16:38:09,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:09,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:09,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:09,885 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:09,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:38:09,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:38:09,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:09,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:38:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:10,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:11,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377284813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:11,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:11,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-03-15 16:38:11,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323174343] [2022-03-15 16:38:11,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:11,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:38:11,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:38:11,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:38:11,321 INFO L87 Difference]: Start difference. First operand 595 states and 1208 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:14,149 INFO L93 Difference]: Finished difference Result 908 states and 1838 transitions. [2022-03-15 16:38:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:38:14,149 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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 29 [2022-03-15 16:38:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:14,150 INFO L225 Difference]: With dead ends: 908 [2022-03-15 16:38:14,150 INFO L226 Difference]: Without dead ends: 883 [2022-03-15 16:38:14,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1393, Invalid=7537, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 16:38:14,151 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 290 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:14,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 121 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:38:14,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-03-15 16:38:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 589. [2022-03-15 16:38:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0051020408163267) internal successors, (1179), 588 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1179 transitions. [2022-03-15 16:38:14,159 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1179 transitions. Word has length 29 [2022-03-15 16:38:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:14,159 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1179 transitions. [2022-03-15 16:38:14,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1179 transitions. [2022-03-15 16:38:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:14,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:14,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:14,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:14,371 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 [2022-03-15 16:38:14,372 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1727060569, now seen corresponding path program 42 times [2022-03-15 16:38:14,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:14,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385785464] [2022-03-15 16:38:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:14,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:14,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:14,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385785464] [2022-03-15 16:38:14,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385785464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:14,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329882788] [2022-03-15 16:38:14,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:14,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:14,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:14,598 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:14,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:38:14,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:38:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:14,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:38:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:15,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:16,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329882788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:16,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:16,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-15 16:38:16,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021226097] [2022-03-15 16:38:16,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:16,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:38:16,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:16,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:38:16,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:38:16,396 INFO L87 Difference]: Start difference. First operand 589 states and 1179 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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) [2022-03-15 16:38:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:21,166 INFO L93 Difference]: Finished difference Result 1179 states and 2345 transitions. [2022-03-15 16:38:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 16:38:21,167 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 29 [2022-03-15 16:38:21,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:21,168 INFO L225 Difference]: With dead ends: 1179 [2022-03-15 16:38:21,168 INFO L226 Difference]: Without dead ends: 1136 [2022-03-15 16:38:21,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3128 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1522, Invalid=8578, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 16:38:21,169 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 288 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:21,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 98 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:38:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-03-15 16:38:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 759. [2022-03-15 16:38:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.0026385224274406) internal successors, (1518), 758 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1518 transitions. [2022-03-15 16:38:21,177 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1518 transitions. Word has length 29 [2022-03-15 16:38:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:21,177 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1518 transitions. [2022-03-15 16:38:21,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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) [2022-03-15 16:38:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1518 transitions. [2022-03-15 16:38:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:21,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:21,178 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:21,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 16:38:21,393 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 [2022-03-15 16:38:21,393 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:21,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:21,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1863336609, now seen corresponding path program 43 times [2022-03-15 16:38:21,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:21,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858266559] [2022-03-15 16:38:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:21,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:21,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:21,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858266559] [2022-03-15 16:38:21,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858266559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:21,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683034479] [2022-03-15 16:38:21,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:21,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:21,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:21,653 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:21,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:38:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:21,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:38:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:22,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:23,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683034479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:23,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:23,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-15 16:38:23,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710451272] [2022-03-15 16:38:23,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:23,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:38:23,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:38:23,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:38:23,356 INFO L87 Difference]: Start difference. First operand 759 states and 1518 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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) [2022-03-15 16:38:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:29,561 INFO L93 Difference]: Finished difference Result 1815 states and 3619 transitions. [2022-03-15 16:38:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 16:38:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 29 [2022-03-15 16:38:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:29,563 INFO L225 Difference]: With dead ends: 1815 [2022-03-15 16:38:29,563 INFO L226 Difference]: Without dead ends: 1769 [2022-03-15 16:38:29,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1903, Invalid=10307, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 16:38:29,564 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:29,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 107 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:38:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-03-15 16:38:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1016. [2022-03-15 16:38:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.0009852216748767) internal successors, (2031), 1015 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2031 transitions. [2022-03-15 16:38:29,579 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2031 transitions. Word has length 29 [2022-03-15 16:38:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:29,579 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2031 transitions. [2022-03-15 16:38:29,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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) [2022-03-15 16:38:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2031 transitions. [2022-03-15 16:38:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:29,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:29,584 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:29,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:29,798 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 [2022-03-15 16:38:29,799 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:29,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1925315549, now seen corresponding path program 44 times [2022-03-15 16:38:29,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:29,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487761014] [2022-03-15 16:38:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:29,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:30,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:30,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487761014] [2022-03-15 16:38:30,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487761014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:30,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231884690] [2022-03-15 16:38:30,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:30,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:30,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:30,020 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:30,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:38:30,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:30,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:30,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:38:30,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:30,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:31,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231884690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:31,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:31,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-15 16:38:31,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763626084] [2022-03-15 16:38:31,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:31,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:38:31,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:38:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:38:31,961 INFO L87 Difference]: Start difference. First operand 1016 states and 2031 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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) [2022-03-15 16:38:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:37,173 INFO L93 Difference]: Finished difference Result 2259 states and 4514 transitions. [2022-03-15 16:38:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-15 16:38:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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 29 [2022-03-15 16:38:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:37,176 INFO L225 Difference]: With dead ends: 2259 [2022-03-15 16:38:37,176 INFO L226 Difference]: Without dead ends: 2223 [2022-03-15 16:38:37,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2498, Invalid=13252, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 16:38:37,178 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 278 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:37,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 135 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:38:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2022-03-15 16:38:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1208. [2022-03-15 16:38:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.003314001657001) internal successors, (2418), 1207 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2418 transitions. [2022-03-15 16:38:37,194 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2418 transitions. Word has length 29 [2022-03-15 16:38:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:37,194 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 2418 transitions. [2022-03-15 16:38:37,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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) [2022-03-15 16:38:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2418 transitions. [2022-03-15 16:38:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:37,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:37,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:37,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 16:38:37,397 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 [2022-03-15 16:38:37,397 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash 849604393, now seen corresponding path program 45 times [2022-03-15 16:38:37,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:37,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341871535] [2022-03-15 16:38:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:37,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:37,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341871535] [2022-03-15 16:38:37,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341871535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:37,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628342869] [2022-03-15 16:38:37,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:38:37,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:37,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:37,614 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:37,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:38:37,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:38:37,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:37,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:38:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:38,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:39,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628342869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:39,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:39,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-15 16:38:39,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687345386] [2022-03-15 16:38:39,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:39,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:38:39,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:39,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:38:39,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:38:39,446 INFO L87 Difference]: Start difference. First operand 1208 states and 2418 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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) [2022-03-15 16:38:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:44,498 INFO L93 Difference]: Finished difference Result 2363 states and 4723 transitions. [2022-03-15 16:38:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 16:38:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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 29 [2022-03-15 16:38:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:44,501 INFO L225 Difference]: With dead ends: 2363 [2022-03-15 16:38:44,501 INFO L226 Difference]: Without dead ends: 2333 [2022-03-15 16:38:44,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4580 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2095, Invalid=11015, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 16:38:44,502 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 278 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:44,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 168 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:38:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-03-15 16:38:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1213. [2022-03-15 16:38:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.004125412541254) internal successors, (2429), 1212 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2429 transitions. [2022-03-15 16:38:44,519 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2429 transitions. Word has length 29 [2022-03-15 16:38:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:44,519 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 2429 transitions. [2022-03-15 16:38:44,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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) [2022-03-15 16:38:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2429 transitions. [2022-03-15 16:38:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:44,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:44,520 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:44,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:44,738 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 [2022-03-15 16:38:44,739 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2097362907, now seen corresponding path program 46 times [2022-03-15 16:38:44,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:44,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710906974] [2022-03-15 16:38:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:44,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:38:44,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:44,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710906974] [2022-03-15 16:38:44,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710906974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:44,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032174495] [2022-03-15 16:38:44,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:38:44,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:44,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:44,953 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:44,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:38:44,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:44,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:44,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:38:44,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:45,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:46,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032174495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:46,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:46,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-15 16:38:46,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420006043] [2022-03-15 16:38:46,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:46,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:38:46,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:38:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:38:46,460 INFO L87 Difference]: Start difference. First operand 1213 states and 2429 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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) [2022-03-15 16:38:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:51,520 INFO L93 Difference]: Finished difference Result 2885 states and 5768 transitions. [2022-03-15 16:38:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:38:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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 29 [2022-03-15 16:38:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:51,523 INFO L225 Difference]: With dead ends: 2885 [2022-03-15 16:38:51,523 INFO L226 Difference]: Without dead ends: 2834 [2022-03-15 16:38:51,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1895, Invalid=10315, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 16:38:51,524 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:51,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 186 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:38:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-03-15 16:38:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1824. [2022-03-15 16:38:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.0098738343390017) internal successors, (3664), 1823 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3664 transitions. [2022-03-15 16:38:51,545 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3664 transitions. Word has length 29 [2022-03-15 16:38:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:51,545 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 3664 transitions. [2022-03-15 16:38:51,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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) [2022-03-15 16:38:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3664 transitions. [2022-03-15 16:38:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:51,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:51,548 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:51,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:51,759 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 [2022-03-15 16:38:51,759 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:51,760 INFO L85 PathProgramCache]: Analyzing trace with hash 110491549, now seen corresponding path program 47 times [2022-03-15 16:38:51,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:51,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224177461] [2022-03-15 16:38:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:51,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:51,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:51,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224177461] [2022-03-15 16:38:51,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224177461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:51,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448761143] [2022-03-15 16:38:51,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:51,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:51,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:51,972 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:51,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:38:51,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:38:51,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:51,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:38:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:52,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:53,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448761143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:53,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:53,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-15 16:38:53,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531369073] [2022-03-15 16:38:53,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:53,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:38:53,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:38:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:38:53,486 INFO L87 Difference]: Start difference. First operand 1824 states and 3664 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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) [2022-03-15 16:38:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:56,728 INFO L93 Difference]: Finished difference Result 3116 states and 6260 transitions. [2022-03-15 16:38:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:38:56,728 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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 29 [2022-03-15 16:38:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:56,731 INFO L225 Difference]: With dead ends: 3116 [2022-03-15 16:38:56,731 INFO L226 Difference]: Without dead ends: 3065 [2022-03-15 16:38:56,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1379, Invalid=7933, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 16:38:56,732 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 242 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:56,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 192 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:38:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-03-15 16:38:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 1021. [2022-03-15 16:38:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.996078431372549) internal successors, (2036), 1020 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2036 transitions. [2022-03-15 16:38:56,748 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2036 transitions. Word has length 29 [2022-03-15 16:38:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:56,748 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 2036 transitions. [2022-03-15 16:38:56,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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) [2022-03-15 16:38:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2036 transitions. [2022-03-15 16:38:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:38:56,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:56,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:56,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:56,963 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 [2022-03-15 16:38:56,963 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1219843941, now seen corresponding path program 48 times [2022-03-15 16:38:56,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:56,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036971044] [2022-03-15 16:38:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:56,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:57,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:57,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036971044] [2022-03-15 16:38:57,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036971044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:57,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007745629] [2022-03-15 16:38:57,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:57,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:57,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:57,193 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:57,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:38:57,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:38:57,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:57,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:38:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:57,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:58,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007745629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:58,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:58,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-15 16:38:58,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747210908] [2022-03-15 16:38:58,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:58,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:38:58,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:58,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:38:58,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:38:58,768 INFO L87 Difference]: Start difference. First operand 1021 states and 2036 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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) [2022-03-15 16:39:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:01,383 INFO L93 Difference]: Finished difference Result 1676 states and 3347 transitions. [2022-03-15 16:39:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:39:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 29 [2022-03-15 16:39:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:01,383 INFO L225 Difference]: With dead ends: 1676 [2022-03-15 16:39:01,383 INFO L226 Difference]: Without dead ends: 0 [2022-03-15 16:39:01,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1156, Invalid=6500, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:39:01,384 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 254 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:01,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 118 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:39:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-15 16:39:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-15 16:39:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-15 16:39:01,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-03-15 16:39:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:01,385 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-15 16:39:01,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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) [2022-03-15 16:39:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-15 16:39:01,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-15 16:39:01,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:39:01,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:39:01,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:39:01,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:01,595 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 [2022-03-15 16:39:01,598 INFO L732 BasicCegarLoop]: Path program histogram: [48, 1, 1] [2022-03-15 16:39:01,600 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:39:01,600 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:39:01,601 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:39:01 BasicIcfg [2022-03-15 16:39:01,601 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:39:01,602 INFO L158 Benchmark]: Toolchain (without parser) took 233994.78ms. Allocated memory was 201.3MB in the beginning and 377.5MB in the end (delta: 176.2MB). Free memory was 165.3MB in the beginning and 333.4MB in the end (delta: -168.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-15 16:39:01,602 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 201.3MB. Free memory is still 166.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:39:01,602 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.98ms. Allocated memory is still 201.3MB. Free memory was 165.2MB in the beginning and 163.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 16:39:01,602 INFO L158 Benchmark]: Boogie Preprocessor took 10.07ms. Allocated memory is still 201.3MB. Free memory was 163.7MB in the beginning and 162.7MB in the end (delta: 907.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:39:01,602 INFO L158 Benchmark]: RCFGBuilder took 248.66ms. Allocated memory is still 201.3MB. Free memory was 162.6MB in the beginning and 153.1MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:39:01,602 INFO L158 Benchmark]: TraceAbstraction took 233684.60ms. Allocated memory was 201.3MB in the beginning and 377.5MB in the end (delta: 176.2MB). Free memory was 152.6MB in the beginning and 333.4MB in the end (delta: -180.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:39:01,603 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 201.3MB. Free memory is still 166.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.98ms. Allocated memory is still 201.3MB. Free memory was 165.2MB in the beginning and 163.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.07ms. Allocated memory is still 201.3MB. Free memory was 163.7MB in the beginning and 162.7MB in the end (delta: 907.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 248.66ms. Allocated memory is still 201.3MB. Free memory was 162.6MB in the beginning and 153.1MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 233684.60ms. Allocated memory was 201.3MB in the beginning and 377.5MB in the end (delta: 176.2MB). Free memory was 152.6MB in the beginning and 333.4MB in the end (delta: -180.8MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 233.6s, OverallIterations: 50, TraceHistogramMax: 4, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 160.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19404 SdHoareTripleChecker+Valid, 28.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19404 mSDsluCounter, 11858 SdHoareTripleChecker+Invalid, 24.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18380 mSDsCounter, 9590 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66015 IncrementalHoareTripleChecker+Invalid, 75605 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9590 mSolverCounterUnsat, 757 mSDtfsCounter, 66015 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6289 GetRequests, 1218 SyntacticMatches, 118 SemanticMatches, 4953 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204131 ImplicationChecksByTransitivity, 156.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1824occurred in iteration=48, InterpolantAutomatonStates: 3968, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 50 MinimizatonAttempts, 24455 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 60.8s InterpolantComputationTime, 2533 NumberOfCodeBlocks, 2533 NumberOfCodeBlocksAsserted, 171 NumberOfCheckSat, 3629 ConstructedInterpolants, 0 QuantifiedInterpolants, 82588 SizeOfPredicates, 423 NumberOfNonLiveVariables, 2064 ConjunctsInSsa, 934 ConjunctsInUnsatCore, 144 InterpolantComputations, 3 PerfectInterpolantSequences, 47/1929 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-15 16:39:01,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...