/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 14:03:01,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 14:03:01,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 14:03:01,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 14:03:01,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-16 14:03:01,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-16 14:03:01,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-16 14:03:01,523 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 14:03:01,545 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 14:03:01,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 14:03:01,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 14:03:01,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 14:03:01,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 14:03:01,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 14:03:01,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 14:03:01,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 14:03:01,547 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 14:03:01,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 14:03:01,548 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 14:03:01,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 14:03:01,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 14:03:01,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 14:03:01,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 14:03:01,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 14:03:01,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 14:03:01,549 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 14:03:01,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 14:03:01,549 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 14:03:01,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 14:03:01,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 14:03:01,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 14:03:01,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 14:03:01,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 14:03:01,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:03:01,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 14:03:01,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 14:03:01,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 14:03:01,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 14:03:01,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 14:03:01,551 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 14:03:01,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 14:03:01,551 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 14:03:01,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 14:03:01,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 14:03:01,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 14:03:01,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 14:03:01,827 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 14:03:01,828 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 14:03:01,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl [2022-02-16 14:03:01,829 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl' [2022-02-16 14:03:01,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 14:03:01,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 14:03:01,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 14:03:01,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 14:03:01,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 14:03:01,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,877 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 14:03:01,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 14:03:01,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 14:03:01,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 14:03:01,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 14:03:01,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 14:03:01,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 14:03:01,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 14:03:01,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 14:03:01,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/1) ... [2022-02-16 14:03:01,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:03:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:01,933 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) [2022-02-16 14:03:01,941 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 [2022-02-16 14:03:01,970 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 14:03:01,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 14:03:01,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 14:03:01,971 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 14:03:01,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 14:03:01,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 14:03:01,971 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 14:03:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 14:03:01,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 14:03:01,973 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 14:03:02,012 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 14:03:02,013 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 14:03:02,124 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 14:03:02,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 14:03:02,143 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 14:03:02,145 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:03:02 BoogieIcfgContainer [2022-02-16 14:03:02,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 14:03:02,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 14:03:02,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 14:03:02,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 14:03:02,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:01" (1/2) ... [2022-02-16 14:03:02,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abc3606 and model type counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:03:02, skipping insertion in model container [2022-02-16 14:03:02,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:03:02" (2/2) ... [2022-02-16 14:03:02,153 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-fun.wvr.bpl [2022-02-16 14:03:02,161 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 14:03:02,161 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 14:03:02,161 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 14:03:02,161 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 14:03:02,201 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-16 14:03:02,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 14:03:02,259 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 [2022-02-16 14:03:02,259 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-16 14:03:02,272 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-02-16 14:03:02,291 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-02-16 14:03:02,442 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 723 transitions and produced 361 states. [2022-02-16 14:03:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 361 states, 256 states have (on average 1.6015625) internal successors, (410), 360 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 14:03:02,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:02,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:02,473 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash 288834743, now seen corresponding path program 1 times [2022-02-16 14:03:02,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:02,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250155044] [2022-02-16 14:03:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:02,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:02,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:02,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250155044] [2022-02-16 14:03:02,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250155044] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:03:02,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:03:02,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:03:02,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836458720] [2022-02-16 14:03:02,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:03:02,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:03:02,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:03:02,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:03:02,688 INFO L87 Difference]: Start difference. First operand has 361 states, 256 states have (on average 1.6015625) internal successors, (410), 360 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:02,723 INFO L93 Difference]: Finished difference Result 359 states and 408 transitions. [2022-02-16 14:03:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:03:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 14:03:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:02,743 INFO L225 Difference]: With dead ends: 359 [2022-02-16 14:03:02,743 INFO L226 Difference]: Without dead ends: 151 [2022-02-16 14:03:02,745 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 [2022-02-16 14:03:02,747 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:02,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:03:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-16 14:03:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 21. [2022-02-16 14:03:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-02-16 14:03:02,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2022-02-16 14:03:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:02,800 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-02-16 14:03:02,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-02-16 14:03:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 14:03:02,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:02,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:02,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 14:03:02,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1735134151, now seen corresponding path program 1 times [2022-02-16 14:03:02,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:02,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160461806] [2022-02-16 14:03:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:02,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:02,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:02,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160461806] [2022-02-16 14:03:02,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160461806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:02,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467320661] [2022-02-16 14:03:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:02,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:02,909 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) [2022-02-16 14:03:02,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 14:03:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:02,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 14:03:02,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:03,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:03,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467320661] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:03,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-16 14:03:03,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-02-16 14:03:03,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694362621] [2022-02-16 14:03:03,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:03:03,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 14:03:03,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 14:03:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:03:03,213 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:03,332 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-02-16 14:03:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 14:03:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 14:03:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:03,335 INFO L225 Difference]: With dead ends: 34 [2022-02-16 14:03:03,335 INFO L226 Difference]: Without dead ends: 34 [2022-02-16 14:03:03,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:03:03,339 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:03,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:03:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-16 14:03:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2022-02-16 14:03:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-02-16 14:03:03,359 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2022-02-16 14:03:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:03,360 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-02-16 14:03:03,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-02-16 14:03:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 14:03:03,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:03,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:03,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-16 14:03:03,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:03,562 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:03,563 INFO L85 PathProgramCache]: Analyzing trace with hash -143127367, now seen corresponding path program 1 times [2022-02-16 14:03:03,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:03,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064083035] [2022-02-16 14:03:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:03,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:03,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:03,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064083035] [2022-02-16 14:03:03,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064083035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:03:03,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:03:03,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 14:03:03,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646299658] [2022-02-16 14:03:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:03:03,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 14:03:03,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 14:03:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:03:03,625 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:03,686 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-02-16 14:03:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 14:03:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 14:03:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:03,687 INFO L225 Difference]: With dead ends: 28 [2022-02-16 14:03:03,687 INFO L226 Difference]: Without dead ends: 26 [2022-02-16 14:03:03,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:03:03,688 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:03,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:03:03,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-16 14:03:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-02-16 14:03:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-02-16 14:03:03,703 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2022-02-16 14:03:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:03,704 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-02-16 14:03:03,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-02-16 14:03:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 14:03:03,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:03,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:03,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-16 14:03:03,707 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash 442950587, now seen corresponding path program 1 times [2022-02-16 14:03:03,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:03,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070204702] [2022-02-16 14:03:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:03,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:03,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:03,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070204702] [2022-02-16 14:03:03,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070204702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:03,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919637763] [2022-02-16 14:03:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:03,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:03,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:03,785 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) [2022-02-16 14:03:03,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 14:03:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:03:03,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:03,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 14:03:03,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 14:03:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:03,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:03,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-02-16 14:03:03,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-16 14:03:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:03,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919637763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:03,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:03,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-16 14:03:03,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943649359] [2022-02-16 14:03:03,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:03,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:03:03,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:03,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:03:03,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:03:03,960 INFO L87 Difference]: Start difference. First operand 23 states and 27 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) [2022-02-16 14:03:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:03,988 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-02-16 14:03:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:03:03,988 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 [2022-02-16 14:03:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:03,991 INFO L225 Difference]: With dead ends: 48 [2022-02-16 14:03:03,992 INFO L226 Difference]: Without dead ends: 44 [2022-02-16 14:03:03,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:03:03,998 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:04,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:03:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-16 14:03:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2022-02-16 14:03:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-16 14:03:04,008 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 18 [2022-02-16 14:03:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:04,008 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-16 14:03:04,008 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) [2022-02-16 14:03:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-16 14:03:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 14:03:04,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:04,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:04,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:04,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-16 14:03:04,210 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:04,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:04,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1627072649, now seen corresponding path program 2 times [2022-02-16 14:03:04,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:04,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478677196] [2022-02-16 14:03:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:04,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:04,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:04,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478677196] [2022-02-16 14:03:04,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478677196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:03:04,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:03:04,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 14:03:04,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140735511] [2022-02-16 14:03:04,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:03:04,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:03:04,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:03:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:03:04,247 INFO L87 Difference]: Start difference. First operand 35 states and 46 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) [2022-02-16 14:03:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:04,266 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-02-16 14:03:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:03:04,266 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 [2022-02-16 14:03:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:04,267 INFO L225 Difference]: With dead ends: 55 [2022-02-16 14:03:04,267 INFO L226 Difference]: Without dead ends: 51 [2022-02-16 14:03:04,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:03:04,268 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:04,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:03:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-16 14:03:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-02-16 14:03:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-02-16 14:03:04,272 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 18 [2022-02-16 14:03:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:04,272 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-02-16 14:03:04,272 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) [2022-02-16 14:03:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-02-16 14:03:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:03:04,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:04,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:04,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-16 14:03:04,273 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:04,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1023148605, now seen corresponding path program 3 times [2022-02-16 14:03:04,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:04,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365355380] [2022-02-16 14:03:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:04,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:04,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:04,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365355380] [2022-02-16 14:03:04,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365355380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:04,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285659639] [2022-02-16 14:03:04,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:04,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:04,354 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) [2022-02-16 14:03:04,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 14:03:04,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:03:04,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:03:04,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:04,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:04,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285659639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:04,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:04,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-16 14:03:04,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438475950] [2022-02-16 14:03:04,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:04,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:03:04,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:03:04,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:03:04,680 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:05,058 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-02-16 14:03:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:03:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 14:03:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:05,061 INFO L225 Difference]: With dead ends: 97 [2022-02-16 14:03:05,061 INFO L226 Difference]: Without dead ends: 97 [2022-02-16 14:03:05,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:03:05,065 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:05,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 75 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-16 14:03:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 38. [2022-02-16 14:03:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-02-16 14:03:05,073 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 20 [2022-02-16 14:03:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:05,074 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-02-16 14:03:05,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-02-16 14:03:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:03:05,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:05,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:05,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:05,298 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 [2022-02-16 14:03:05,299 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1933310653, now seen corresponding path program 4 times [2022-02-16 14:03:05,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:05,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113647258] [2022-02-16 14:03:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:05,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:05,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:05,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113647258] [2022-02-16 14:03:05,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113647258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:05,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359320496] [2022-02-16 14:03:05,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:03:05,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:05,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:05,371 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) [2022-02-16 14:03:05,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 14:03:05,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:03:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:03:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:05,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:05,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359320496] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:05,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:05,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 14:03:05,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780565505] [2022-02-16 14:03:05,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:05,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:03:05,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:03:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:03:05,691 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:05,924 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-02-16 14:03:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:03:05,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 14:03:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:05,925 INFO L225 Difference]: With dead ends: 104 [2022-02-16 14:03:05,925 INFO L226 Difference]: Without dead ends: 96 [2022-02-16 14:03:05,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:03:05,926 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:05,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 72 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-16 14:03:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 48. [2022-02-16 14:03:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 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) [2022-02-16 14:03:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-02-16 14:03:05,929 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 20 [2022-02-16 14:03:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:05,930 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-02-16 14:03:05,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-02-16 14:03:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:03:05,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:05,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:05,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:06,131 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 [2022-02-16 14:03:06,131 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash -381167879, now seen corresponding path program 5 times [2022-02-16 14:03:06,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:06,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804454828] [2022-02-16 14:03:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:06,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:06,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:06,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804454828] [2022-02-16 14:03:06,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804454828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:06,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877370905] [2022-02-16 14:03:06,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:03:06,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:06,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:06,220 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) [2022-02-16 14:03:06,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 14:03:06,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:03:06,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:06,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:03:06,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:06,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:06,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877370905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:06,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:06,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 14:03:06,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112888296] [2022-02-16 14:03:06,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:06,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:03:06,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:03:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:03:06,522 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:06,899 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2022-02-16 14:03:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:03:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 14:03:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:06,901 INFO L225 Difference]: With dead ends: 137 [2022-02-16 14:03:06,901 INFO L226 Difference]: Without dead ends: 137 [2022-02-16 14:03:06,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:03:06,902 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:06,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 92 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-16 14:03:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 65. [2022-02-16 14:03:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2022-02-16 14:03:06,907 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 20 [2022-02-16 14:03:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:06,908 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2022-02-16 14:03:06,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2022-02-16 14:03:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:03:06,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:06,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:06,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:07,135 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 [2022-02-16 14:03:07,136 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:07,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1210838905, now seen corresponding path program 6 times [2022-02-16 14:03:07,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:07,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575934753] [2022-02-16 14:03:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:07,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:07,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:07,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575934753] [2022-02-16 14:03:07,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575934753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:07,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246710314] [2022-02-16 14:03:07,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:03:07,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:07,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:07,204 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) [2022-02-16 14:03:07,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 14:03:07,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 14:03:07,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:03:07,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:07,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:07,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246710314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:07,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:07,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-16 14:03:07,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184067896] [2022-02-16 14:03:07,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:07,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:03:07,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:07,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:03:07,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:03:07,452 INFO L87 Difference]: Start difference. First operand 65 states and 93 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:07,610 INFO L93 Difference]: Finished difference Result 101 states and 136 transitions. [2022-02-16 14:03:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:03:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:03:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:07,611 INFO L225 Difference]: With dead ends: 101 [2022-02-16 14:03:07,611 INFO L226 Difference]: Without dead ends: 97 [2022-02-16 14:03:07,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:03:07,612 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:07,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 57 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-16 14:03:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-02-16 14:03:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.462686567164179) internal successors, (98), 67 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 98 transitions. [2022-02-16 14:03:07,617 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 98 transitions. Word has length 20 [2022-02-16 14:03:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:07,617 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 98 transitions. [2022-02-16 14:03:07,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 98 transitions. [2022-02-16 14:03:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:03:07,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:07,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:07,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:07,818 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 [2022-02-16 14:03:07,818 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:07,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:07,819 INFO L85 PathProgramCache]: Analyzing trace with hash -859184331, now seen corresponding path program 7 times [2022-02-16 14:03:07,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:07,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972831608] [2022-02-16 14:03:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:07,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:07,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:07,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972831608] [2022-02-16 14:03:07,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972831608] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:07,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297837700] [2022-02-16 14:03:07,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:03:07,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:07,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:07,886 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) [2022-02-16 14:03:07,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 14:03:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:07,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:03:07,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:08,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:08,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297837700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:08,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:08,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-16 14:03:08,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013288083] [2022-02-16 14:03:08,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:08,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:03:08,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:08,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:03:08,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:03:08,137 INFO L87 Difference]: Start difference. First operand 68 states and 98 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:08,398 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2022-02-16 14:03:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:03:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 14:03:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:08,399 INFO L225 Difference]: With dead ends: 88 [2022-02-16 14:03:08,399 INFO L226 Difference]: Without dead ends: 88 [2022-02-16 14:03:08,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:03:08,413 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:08,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 85 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-16 14:03:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2022-02-16 14:03:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 102 transitions. [2022-02-16 14:03:08,418 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 102 transitions. Word has length 20 [2022-02-16 14:03:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:08,418 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 102 transitions. [2022-02-16 14:03:08,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 102 transitions. [2022-02-16 14:03:08,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 14:03:08,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:08,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:08,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:08,631 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 [2022-02-16 14:03:08,632 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1157857471, now seen corresponding path program 8 times [2022-02-16 14:03:08,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:08,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359819063] [2022-02-16 14:03:08,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:08,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:08,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:08,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359819063] [2022-02-16 14:03:08,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359819063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:08,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710495527] [2022-02-16 14:03:08,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:03:08,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:08,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:08,684 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) [2022-02-16 14:03:08,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 14:03:08,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:03:08,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:08,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:03:08,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:08,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:08,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-02-16 14:03:08,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:08,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-02-16 14:03:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:08,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:08,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:08,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-02-16 14:03:08,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:08,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-16 14:03:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:08,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710495527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:08,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:08,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2022-02-16 14:03:08,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423147162] [2022-02-16 14:03:08,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:08,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 14:03:08,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:08,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 14:03:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:03:08,976 INFO L87 Difference]: Start difference. First operand 71 states and 102 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:09,024 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2022-02-16 14:03:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 14:03:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:03:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:09,025 INFO L225 Difference]: With dead ends: 171 [2022-02-16 14:03:09,025 INFO L226 Difference]: Without dead ends: 167 [2022-02-16 14:03:09,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:03:09,026 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:09,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 164 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 46 Unchecked, 0.0s Time] [2022-02-16 14:03:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-16 14:03:09,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2022-02-16 14:03:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.5047619047619047) internal successors, (158), 105 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 158 transitions. [2022-02-16 14:03:09,032 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 158 transitions. Word has length 22 [2022-02-16 14:03:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:09,032 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 158 transitions. [2022-02-16 14:03:09,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 158 transitions. [2022-02-16 14:03:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 14:03:09,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:09,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:09,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:09,247 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 [2022-02-16 14:03:09,248 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1634637513, now seen corresponding path program 9 times [2022-02-16 14:03:09,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:09,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542666017] [2022-02-16 14:03:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:09,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:09,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:09,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542666017] [2022-02-16 14:03:09,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542666017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:09,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185784306] [2022-02-16 14:03:09,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:09,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:09,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:09,288 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) [2022-02-16 14:03:09,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 14:03:09,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:03:09,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:03:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:09,421 INFO L353 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2022-02-16 14:03:09,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2022-02-16 14:03:09,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:09,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-02-16 14:03:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:09,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:09,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:09,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2022-02-16 14:03:09,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:09,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-16 14:03:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:09,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185784306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:09,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:09,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-02-16 14:03:09,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239196081] [2022-02-16 14:03:09,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:09,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 14:03:09,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:09,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 14:03:09,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:03:09,567 INFO L87 Difference]: Start difference. First operand 106 states and 158 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:09,613 INFO L93 Difference]: Finished difference Result 155 states and 220 transitions. [2022-02-16 14:03:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 14:03:09,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-16 14:03:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:09,615 INFO L225 Difference]: With dead ends: 155 [2022-02-16 14:03:09,615 INFO L226 Difference]: Without dead ends: 151 [2022-02-16 14:03:09,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:03:09,615 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 49 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:09,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 110 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:03:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-16 14:03:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 124. [2022-02-16 14:03:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.5284552845528456) internal successors, (188), 123 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 188 transitions. [2022-02-16 14:03:09,629 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 188 transitions. Word has length 22 [2022-02-16 14:03:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:09,629 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 188 transitions. [2022-02-16 14:03:09,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 188 transitions. [2022-02-16 14:03:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 14:03:09,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:09,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:09,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:09,843 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 [2022-02-16 14:03:09,843 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:09,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1174869193, now seen corresponding path program 10 times [2022-02-16 14:03:09,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:09,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627421247] [2022-02-16 14:03:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:09,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:09,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:09,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627421247] [2022-02-16 14:03:09,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627421247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:09,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032064047] [2022-02-16 14:03:09,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:03:09,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:09,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:09,878 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) [2022-02-16 14:03:09,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 14:03:09,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:03:09,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:03:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:09,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:09,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-02-16 14:03:10,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:10,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-02-16 14:03:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:10,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:10,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:10,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-02-16 14:03:10,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:10,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-16 14:03:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:10,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032064047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:10,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:10,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2022-02-16 14:03:10,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503538185] [2022-02-16 14:03:10,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:10,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 14:03:10,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 14:03:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:03:10,096 INFO L87 Difference]: Start difference. First operand 124 states and 188 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:10,147 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2022-02-16 14:03:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 14:03:10,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-16 14:03:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:10,148 INFO L225 Difference]: With dead ends: 201 [2022-02-16 14:03:10,148 INFO L226 Difference]: Without dead ends: 197 [2022-02-16 14:03:10,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:03:10,149 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:10,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 193 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2022-02-16 14:03:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-16 14:03:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 138. [2022-02-16 14:03:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.5401459854014599) internal successors, (211), 137 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 211 transitions. [2022-02-16 14:03:10,153 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 211 transitions. Word has length 22 [2022-02-16 14:03:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:10,153 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 211 transitions. [2022-02-16 14:03:10,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 211 transitions. [2022-02-16 14:03:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:03:10,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:10,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:10,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:10,363 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 [2022-02-16 14:03:10,363 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1023308223, now seen corresponding path program 11 times [2022-02-16 14:03:10,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:10,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970773315] [2022-02-16 14:03:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:10,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:10,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:10,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970773315] [2022-02-16 14:03:10,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970773315] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:10,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304648545] [2022-02-16 14:03:10,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:03:10,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:10,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:10,466 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) [2022-02-16 14:03:10,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 14:03:10,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:03:10,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:03:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:10,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:10,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304648545] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:10,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:10,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 14:03:10,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205153212] [2022-02-16 14:03:10,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:10,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:03:10,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:10,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:03:10,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:03:10,799 INFO L87 Difference]: Start difference. First operand 138 states and 211 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:11,334 INFO L93 Difference]: Finished difference Result 286 states and 395 transitions. [2022-02-16 14:03:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:03:11,334 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:03:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:11,336 INFO L225 Difference]: With dead ends: 286 [2022-02-16 14:03:11,336 INFO L226 Difference]: Without dead ends: 286 [2022-02-16 14:03:11,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=576, Invalid=1586, Unknown=0, NotChecked=0, Total=2162 [2022-02-16 14:03:11,337 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 159 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:11,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 87 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-02-16 14:03:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 114. [2022-02-16 14:03:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 113 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 171 transitions. [2022-02-16 14:03:11,341 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 171 transitions. Word has length 24 [2022-02-16 14:03:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:11,342 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 171 transitions. [2022-02-16 14:03:11,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 171 transitions. [2022-02-16 14:03:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:03:11,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:11,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:11,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:11,555 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 [2022-02-16 14:03:11,555 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1764058817, now seen corresponding path program 12 times [2022-02-16 14:03:11,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:11,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894641732] [2022-02-16 14:03:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:11,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:11,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:11,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894641732] [2022-02-16 14:03:11,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894641732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:11,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862115690] [2022-02-16 14:03:11,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:03:11,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:11,640 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) [2022-02-16 14:03:11,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 14:03:11,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:03:11,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:11,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:03:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:11,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:11,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862115690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:11,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:11,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 14:03:11,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288822906] [2022-02-16 14:03:11,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:11,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:03:11,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:03:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:03:11,940 INFO L87 Difference]: Start difference. First operand 114 states and 171 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:12,367 INFO L93 Difference]: Finished difference Result 304 states and 409 transitions. [2022-02-16 14:03:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:03:12,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 14:03:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:12,368 INFO L225 Difference]: With dead ends: 304 [2022-02-16 14:03:12,369 INFO L226 Difference]: Without dead ends: 291 [2022-02-16 14:03:12,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=1098, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:03:12,370 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 201 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:12,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 98 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-16 14:03:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 121. [2022-02-16 14:03:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.4666666666666666) internal successors, (176), 120 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 176 transitions. [2022-02-16 14:03:12,375 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 176 transitions. Word has length 24 [2022-02-16 14:03:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:12,375 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 176 transitions. [2022-02-16 14:03:12,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 176 transitions. [2022-02-16 14:03:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:03:12,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:12,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:12,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:12,587 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 [2022-02-16 14:03:12,587 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:12,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1764028103, now seen corresponding path program 13 times [2022-02-16 14:03:12,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:12,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640668914] [2022-02-16 14:03:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:12,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:12,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:12,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640668914] [2022-02-16 14:03:12,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640668914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:12,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452887645] [2022-02-16 14:03:12,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:03:12,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:12,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:12,651 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) [2022-02-16 14:03:12,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 14:03:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:12,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:03:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:12,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:12,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452887645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:12,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:12,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-02-16 14:03:12,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745222150] [2022-02-16 14:03:12,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:12,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:03:12,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:03:12,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:03:12,974 INFO L87 Difference]: Start difference. First operand 121 states and 176 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:13,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:13,351 INFO L93 Difference]: Finished difference Result 266 states and 370 transitions. [2022-02-16 14:03:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:03:13,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:03:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:13,353 INFO L225 Difference]: With dead ends: 266 [2022-02-16 14:03:13,353 INFO L226 Difference]: Without dead ends: 258 [2022-02-16 14:03:13,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:03:13,354 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:13,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 100 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-16 14:03:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 152. [2022-02-16 14:03:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.490066225165563) internal successors, (225), 151 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 225 transitions. [2022-02-16 14:03:13,360 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 225 transitions. Word has length 24 [2022-02-16 14:03:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:13,360 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 225 transitions. [2022-02-16 14:03:13,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 225 transitions. [2022-02-16 14:03:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:03:13,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:13,361 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:13,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:13,581 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 [2022-02-16 14:03:13,581 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:13,582 INFO L85 PathProgramCache]: Analyzing trace with hash 460915957, now seen corresponding path program 14 times [2022-02-16 14:03:13,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:13,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334887926] [2022-02-16 14:03:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:13,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:13,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:13,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334887926] [2022-02-16 14:03:13,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334887926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:13,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840587107] [2022-02-16 14:03:13,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:03:13,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:13,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:13,664 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) [2022-02-16 14:03:13,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 14:03:13,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:03:13,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:13,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:03:13,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:13,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:14,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840587107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:14,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:14,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-02-16 14:03:14,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234793710] [2022-02-16 14:03:14,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:14,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:03:14,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:03:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:03:14,022 INFO L87 Difference]: Start difference. First operand 152 states and 225 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:14,545 INFO L93 Difference]: Finished difference Result 231 states and 327 transitions. [2022-02-16 14:03:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 14:03:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 14:03:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:14,547 INFO L225 Difference]: With dead ends: 231 [2022-02-16 14:03:14,547 INFO L226 Difference]: Without dead ends: 231 [2022-02-16 14:03:14,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:03:14,549 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 99 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 130 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-16 14:03:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 147. [2022-02-16 14:03:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.4657534246575343) internal successors, (214), 146 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-16 14:03:14,554 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 24 [2022-02-16 14:03:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:14,554 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-16 14:03:14,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-16 14:03:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:03:14,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:14,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:14,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:14,778 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 [2022-02-16 14:03:14,778 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2004911357, now seen corresponding path program 15 times [2022-02-16 14:03:14,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:14,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358118296] [2022-02-16 14:03:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:14,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:14,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:14,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358118296] [2022-02-16 14:03:14,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358118296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:14,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101801402] [2022-02-16 14:03:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:14,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:14,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:14,866 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) [2022-02-16 14:03:14,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 14:03:14,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:03:14,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:14,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:03:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:15,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:15,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101801402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:15,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:15,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 14:03:15,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496834289] [2022-02-16 14:03:15,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:15,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:03:15,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:15,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:03:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:03:15,200 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:15,799 INFO L93 Difference]: Finished difference Result 350 states and 473 transitions. [2022-02-16 14:03:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:03:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 14:03:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:15,800 INFO L225 Difference]: With dead ends: 350 [2022-02-16 14:03:15,800 INFO L226 Difference]: Without dead ends: 350 [2022-02-16 14:03:15,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=726, Invalid=1824, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 14:03:15,802 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 181 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:15,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 125 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-16 14:03:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 158. [2022-02-16 14:03:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.4777070063694266) internal successors, (232), 157 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 232 transitions. [2022-02-16 14:03:15,808 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 232 transitions. Word has length 24 [2022-02-16 14:03:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:15,808 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 232 transitions. [2022-02-16 14:03:15,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 232 transitions. [2022-02-16 14:03:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:03:15,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:15,809 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:15,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:16,031 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 [2022-02-16 14:03:16,031 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1379893891, now seen corresponding path program 16 times [2022-02-16 14:03:16,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:16,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241531464] [2022-02-16 14:03:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:16,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:16,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:16,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241531464] [2022-02-16 14:03:16,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241531464] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:16,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344510089] [2022-02-16 14:03:16,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:03:16,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:16,107 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) [2022-02-16 14:03:16,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 14:03:16,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:03:16,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:16,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:03:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:16,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:16,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344510089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:16,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:16,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-16 14:03:16,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371852360] [2022-02-16 14:03:16,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:16,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:03:16,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:16,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:03:16,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:03:16,413 INFO L87 Difference]: Start difference. First operand 158 states and 232 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:16,710 INFO L93 Difference]: Finished difference Result 228 states and 320 transitions. [2022-02-16 14:03:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:03:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 14:03:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:16,711 INFO L225 Difference]: With dead ends: 228 [2022-02-16 14:03:16,711 INFO L226 Difference]: Without dead ends: 220 [2022-02-16 14:03:16,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:03:16,712 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:16,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 127 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-16 14:03:16,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2022-02-16 14:03:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.4774193548387098) internal successors, (229), 155 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 229 transitions. [2022-02-16 14:03:16,717 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 229 transitions. Word has length 24 [2022-02-16 14:03:16,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:16,717 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 229 transitions. [2022-02-16 14:03:16,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 229 transitions. [2022-02-16 14:03:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:03:16,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:16,718 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:16,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:16,927 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 [2022-02-16 14:03:16,927 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 394656441, now seen corresponding path program 17 times [2022-02-16 14:03:16,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:16,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258846668] [2022-02-16 14:03:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:16,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:17,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:17,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258846668] [2022-02-16 14:03:17,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258846668] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:17,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838070307] [2022-02-16 14:03:17,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:03:17,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:17,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:17,021 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) [2022-02-16 14:03:17,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 14:03:17,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:03:17,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:17,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:03:17,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:17,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:17,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838070307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:17,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:17,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-02-16 14:03:17,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578525928] [2022-02-16 14:03:17,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:17,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:03:17,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:03:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:03:17,357 INFO L87 Difference]: Start difference. First operand 156 states and 229 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:18,037 INFO L93 Difference]: Finished difference Result 405 states and 564 transitions. [2022-02-16 14:03:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:03:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:03:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:18,039 INFO L225 Difference]: With dead ends: 405 [2022-02-16 14:03:18,039 INFO L226 Difference]: Without dead ends: 405 [2022-02-16 14:03:18,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=2316, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:03:18,040 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 203 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:18,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 104 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-02-16 14:03:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 236. [2022-02-16 14:03:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5319148936170213) internal successors, (360), 235 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 360 transitions. [2022-02-16 14:03:18,048 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 360 transitions. Word has length 24 [2022-02-16 14:03:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:18,049 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 360 transitions. [2022-02-16 14:03:18,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 360 transitions. [2022-02-16 14:03:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:03:18,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:18,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:18,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:18,263 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 [2022-02-16 14:03:18,263 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1607867331, now seen corresponding path program 18 times [2022-02-16 14:03:18,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:18,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873057731] [2022-02-16 14:03:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:18,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:18,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:18,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873057731] [2022-02-16 14:03:18,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873057731] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:18,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700122543] [2022-02-16 14:03:18,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:03:18,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:18,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:18,308 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) [2022-02-16 14:03:18,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 14:03:18,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:03:18,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:18,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:03:18,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:18,492 INFO L353 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2022-02-16 14:03:18,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 57 [2022-02-16 14:03:18,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:18,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-02-16 14:03:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:18,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:18,772 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-16 14:03:18,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-02-16 14:03:18,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:18,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-02-16 14:03:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:18,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700122543] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:18,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:18,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2022-02-16 14:03:18,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843647997] [2022-02-16 14:03:18,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:18,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:03:18,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:18,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:03:18,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:03:18,820 INFO L87 Difference]: Start difference. First operand 236 states and 360 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:18,932 INFO L93 Difference]: Finished difference Result 387 states and 574 transitions. [2022-02-16 14:03:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 14:03:18,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:03:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:18,934 INFO L225 Difference]: With dead ends: 387 [2022-02-16 14:03:18,934 INFO L226 Difference]: Without dead ends: 383 [2022-02-16 14:03:18,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:03:18,935 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 48 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:18,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 255 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-02-16 14:03:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-16 14:03:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 324. [2022-02-16 14:03:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.5541795665634675) internal successors, (502), 323 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 502 transitions. [2022-02-16 14:03:18,943 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 502 transitions. Word has length 26 [2022-02-16 14:03:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:18,943 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 502 transitions. [2022-02-16 14:03:18,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 502 transitions. [2022-02-16 14:03:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:03:18,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:18,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:18,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:19,159 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 [2022-02-16 14:03:19,159 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 304724471, now seen corresponding path program 19 times [2022-02-16 14:03:19,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:19,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286216174] [2022-02-16 14:03:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:19,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:19,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:19,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286216174] [2022-02-16 14:03:19,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286216174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:19,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122813401] [2022-02-16 14:03:19,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:03:19,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:19,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:19,201 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) [2022-02-16 14:03:19,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 14:03:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:19,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:03:19,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:19,352 INFO L353 Elim1Store]: treesize reduction 39, result has 41.8 percent of original size [2022-02-16 14:03:19,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 50 [2022-02-16 14:03:19,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:19,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-02-16 14:03:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:19,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:19,565 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-16 14:03:19,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2022-02-16 14:03:19,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:19,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-02-16 14:03:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:19,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122813401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:19,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:19,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2022-02-16 14:03:19,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979552299] [2022-02-16 14:03:19,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:19,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:03:19,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:19,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:03:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:03:19,604 INFO L87 Difference]: Start difference. First operand 324 states and 502 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:19,731 INFO L93 Difference]: Finished difference Result 471 states and 699 transitions. [2022-02-16 14:03:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 14:03:19,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:03:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:19,733 INFO L225 Difference]: With dead ends: 471 [2022-02-16 14:03:19,733 INFO L226 Difference]: Without dead ends: 463 [2022-02-16 14:03:19,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:03:19,734 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 73 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:19,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 317 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-16 14:03:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 381. [2022-02-16 14:03:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.5763157894736841) internal successors, (599), 380 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 599 transitions. [2022-02-16 14:03:19,745 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 599 transitions. Word has length 26 [2022-02-16 14:03:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:19,746 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 599 transitions. [2022-02-16 14:03:19,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 599 transitions. [2022-02-16 14:03:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:03:19,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:19,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:19,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:19,967 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 [2022-02-16 14:03:19,967 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 426155255, now seen corresponding path program 20 times [2022-02-16 14:03:19,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:19,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505822507] [2022-02-16 14:03:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:19,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:20,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:20,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505822507] [2022-02-16 14:03:20,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505822507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:20,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914661270] [2022-02-16 14:03:20,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:03:20,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:20,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:20,016 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) [2022-02-16 14:03:20,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 14:03:20,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:03:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:03:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:20,196 INFO L353 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2022-02-16 14:03:20,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 59 [2022-02-16 14:03:20,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:20,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2022-02-16 14:03:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:20,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:20,417 INFO L353 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2022-02-16 14:03:20,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 66 [2022-02-16 14:03:20,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:20,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2022-02-16 14:03:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:20,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914661270] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:20,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:20,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-02-16 14:03:20,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37857504] [2022-02-16 14:03:20,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:20,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:03:20,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:03:20,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:03:20,472 INFO L87 Difference]: Start difference. First operand 381 states and 599 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:20,590 INFO L93 Difference]: Finished difference Result 494 states and 741 transitions. [2022-02-16 14:03:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 14:03:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:03:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:20,592 INFO L225 Difference]: With dead ends: 494 [2022-02-16 14:03:20,592 INFO L226 Difference]: Without dead ends: 488 [2022-02-16 14:03:20,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:03:20,593 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 88 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:20,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 333 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-02-16 14:03:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 405. [2022-02-16 14:03:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.5816831683168318) internal successors, (639), 404 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 639 transitions. [2022-02-16 14:03:20,605 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 639 transitions. Word has length 26 [2022-02-16 14:03:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:20,605 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 639 transitions. [2022-02-16 14:03:20,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 639 transitions. [2022-02-16 14:03:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:03:20,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:20,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:20,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:20,831 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 [2022-02-16 14:03:20,831 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1157021687, now seen corresponding path program 21 times [2022-02-16 14:03:20,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:20,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615786351] [2022-02-16 14:03:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:20,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:20,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:20,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615786351] [2022-02-16 14:03:20,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615786351] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:20,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227955446] [2022-02-16 14:03:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:20,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:20,874 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) [2022-02-16 14:03:20,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 14:03:20,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:03:20,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:03:20,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:20,956 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-16 14:03:20,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-02-16 14:03:21,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:21,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-02-16 14:03:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:21,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:21,338 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-16 14:03:21,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-02-16 14:03:21,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:21,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-02-16 14:03:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:21,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227955446] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:21,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:21,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-02-16 14:03:21,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413778250] [2022-02-16 14:03:21,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:21,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:03:21,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:03:21,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:03:21,400 INFO L87 Difference]: Start difference. First operand 405 states and 639 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:21,471 INFO L93 Difference]: Finished difference Result 583 states and 874 transitions. [2022-02-16 14:03:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 14:03:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:03:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:21,474 INFO L225 Difference]: With dead ends: 583 [2022-02-16 14:03:21,474 INFO L226 Difference]: Without dead ends: 579 [2022-02-16 14:03:21,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:03:21,475 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 78 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:21,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 348 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 175 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-02-16 14:03:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-02-16 14:03:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 465. [2022-02-16 14:03:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.5862068965517242) internal successors, (736), 464 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 736 transitions. [2022-02-16 14:03:21,486 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 736 transitions. Word has length 26 [2022-02-16 14:03:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:21,486 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 736 transitions. [2022-02-16 14:03:21,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 736 transitions. [2022-02-16 14:03:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:21,487 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:21,487 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:21,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-16 14:03:21,703 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 [2022-02-16 14:03:21,703 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1831704645, now seen corresponding path program 22 times [2022-02-16 14:03:21,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:21,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154415464] [2022-02-16 14:03:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:21,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:21,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:21,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154415464] [2022-02-16 14:03:21,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154415464] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:21,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310417032] [2022-02-16 14:03:21,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:03:21,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:21,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:21,794 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) [2022-02-16 14:03:21,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 14:03:21,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:03:21,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:21,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:22,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:22,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310417032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:22,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:22,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-02-16 14:03:22,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605878393] [2022-02-16 14:03:22,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:22,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:03:22,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:03:22,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:03:22,165 INFO L87 Difference]: Start difference. First operand 465 states and 736 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:22,965 INFO L93 Difference]: Finished difference Result 757 states and 1112 transitions. [2022-02-16 14:03:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:03:22,965 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:03:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:22,968 INFO L225 Difference]: With dead ends: 757 [2022-02-16 14:03:22,968 INFO L226 Difference]: Without dead ends: 757 [2022-02-16 14:03:22,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1114, Invalid=3176, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:03:22,970 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 202 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:22,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 118 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-16 14:03:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 400. [2022-02-16 14:03:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.5714285714285714) internal successors, (627), 399 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 627 transitions. [2022-02-16 14:03:22,981 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 627 transitions. Word has length 28 [2022-02-16 14:03:22,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:22,982 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 627 transitions. [2022-02-16 14:03:22,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 627 transitions. [2022-02-16 14:03:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:22,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:22,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:23,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-16 14:03:23,203 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 [2022-02-16 14:03:23,203 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash 431837381, now seen corresponding path program 23 times [2022-02-16 14:03:23,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:23,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912984556] [2022-02-16 14:03:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:23,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:23,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:23,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912984556] [2022-02-16 14:03:23,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912984556] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:23,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924162762] [2022-02-16 14:03:23,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:03:23,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:23,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:23,296 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) [2022-02-16 14:03:23,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 14:03:23,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:03:23,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:23,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:23,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:23,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924162762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:23,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:23,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-16 14:03:23,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716952906] [2022-02-16 14:03:23,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:23,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:03:23,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:03:23,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:03:23,625 INFO L87 Difference]: Start difference. First operand 400 states and 627 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2022-02-16 14:03:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:24,241 INFO L93 Difference]: Finished difference Result 810 states and 1167 transitions. [2022-02-16 14:03:24,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:03:24,241 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 28 [2022-02-16 14:03:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:24,244 INFO L225 Difference]: With dead ends: 810 [2022-02-16 14:03:24,244 INFO L226 Difference]: Without dead ends: 792 [2022-02-16 14:03:24,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=2319, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:03:24,245 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 250 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:24,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 148 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-02-16 14:03:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 417. [2022-02-16 14:03:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.5456730769230769) internal successors, (643), 416 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 643 transitions. [2022-02-16 14:03:24,277 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 643 transitions. Word has length 28 [2022-02-16 14:03:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:24,277 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 643 transitions. [2022-02-16 14:03:24,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2022-02-16 14:03:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 643 transitions. [2022-02-16 14:03:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:24,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:24,279 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:24,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:24,479 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 [2022-02-16 14:03:24,479 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2052967943, now seen corresponding path program 24 times [2022-02-16 14:03:24,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:24,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130649453] [2022-02-16 14:03:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:24,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:24,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:24,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130649453] [2022-02-16 14:03:24,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130649453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:24,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36762336] [2022-02-16 14:03:24,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:03:24,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:24,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:24,556 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) [2022-02-16 14:03:24,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 14:03:24,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:03:24,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:24,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:24,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36762336] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:24,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:24,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-02-16 14:03:24,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608891629] [2022-02-16 14:03:24,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:24,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:03:24,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:03:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:03:24,940 INFO L87 Difference]: Start difference. First operand 417 states and 643 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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) [2022-02-16 14:03:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:25,468 INFO L93 Difference]: Finished difference Result 774 states and 1158 transitions. [2022-02-16 14:03:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 14:03:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 28 [2022-02-16 14:03:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:25,470 INFO L225 Difference]: With dead ends: 774 [2022-02-16 14:03:25,470 INFO L226 Difference]: Without dead ends: 764 [2022-02-16 14:03:25,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=690, Invalid=1962, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 14:03:25,471 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:25,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 122 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-02-16 14:03:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 525. [2022-02-16 14:03:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.5591603053435115) internal successors, (817), 524 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 817 transitions. [2022-02-16 14:03:25,483 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 817 transitions. Word has length 28 [2022-02-16 14:03:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:25,483 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 817 transitions. [2022-02-16 14:03:25,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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) [2022-02-16 14:03:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 817 transitions. [2022-02-16 14:03:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:25,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:25,484 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:25,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:25,705 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 [2022-02-16 14:03:25,706 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:25,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash 171976117, now seen corresponding path program 25 times [2022-02-16 14:03:25,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:25,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201884406] [2022-02-16 14:03:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:25,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:25,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:25,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201884406] [2022-02-16 14:03:25,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201884406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:25,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832744946] [2022-02-16 14:03:25,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:03:25,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:25,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:25,792 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) [2022-02-16 14:03:25,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 14:03:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:25,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:26,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:26,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832744946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:26,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:26,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2022-02-16 14:03:26,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581959583] [2022-02-16 14:03:26,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:26,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:03:26,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:03:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:03:26,198 INFO L87 Difference]: Start difference. First operand 525 states and 817 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:27,048 INFO L93 Difference]: Finished difference Result 729 states and 1092 transitions. [2022-02-16 14:03:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:03:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:03:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:27,050 INFO L225 Difference]: With dead ends: 729 [2022-02-16 14:03:27,050 INFO L226 Difference]: Without dead ends: 729 [2022-02-16 14:03:27,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1214, Invalid=3208, Unknown=0, NotChecked=0, Total=4422 [2022-02-16 14:03:27,051 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:27,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 159 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-02-16 14:03:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 489. [2022-02-16 14:03:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.5348360655737705) internal successors, (749), 488 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 749 transitions. [2022-02-16 14:03:27,062 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 749 transitions. Word has length 28 [2022-02-16 14:03:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:27,062 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 749 transitions. [2022-02-16 14:03:27,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 749 transitions. [2022-02-16 14:03:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:27,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:27,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:27,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-16 14:03:27,271 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 [2022-02-16 14:03:27,271 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1309061377, now seen corresponding path program 26 times [2022-02-16 14:03:27,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:27,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252919587] [2022-02-16 14:03:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:27,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:27,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:27,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252919587] [2022-02-16 14:03:27,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252919587] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:27,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165530727] [2022-02-16 14:03:27,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:03:27,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:27,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:27,368 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) [2022-02-16 14:03:27,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 14:03:27,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:03:27,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:27,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:27,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:27,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165530727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:27,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:27,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-16 14:03:27,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250466439] [2022-02-16 14:03:27,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:27,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:03:27,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:27,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:03:27,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:03:27,741 INFO L87 Difference]: Start difference. First operand 489 states and 749 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:28,607 INFO L93 Difference]: Finished difference Result 862 states and 1224 transitions. [2022-02-16 14:03:28,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 14:03:28,608 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:03:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:28,610 INFO L225 Difference]: With dead ends: 862 [2022-02-16 14:03:28,610 INFO L226 Difference]: Without dead ends: 862 [2022-02-16 14:03:28,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1270, Invalid=3422, Unknown=0, NotChecked=0, Total=4692 [2022-02-16 14:03:28,612 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 261 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:28,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 121 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-02-16 14:03:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 427. [2022-02-16 14:03:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.5234741784037558) internal successors, (649), 426 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 649 transitions. [2022-02-16 14:03:28,654 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 649 transitions. Word has length 28 [2022-02-16 14:03:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 649 transitions. [2022-02-16 14:03:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 649 transitions. [2022-02-16 14:03:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:28,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:28,656 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:28,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:28,857 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 [2022-02-16 14:03:28,857 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -198538879, now seen corresponding path program 27 times [2022-02-16 14:03:28,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:28,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281012315] [2022-02-16 14:03:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:28,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:28,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:28,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281012315] [2022-02-16 14:03:28,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281012315] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:28,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994870178] [2022-02-16 14:03:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:28,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:28,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:28,927 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) [2022-02-16 14:03:28,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 14:03:28,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:03:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:29,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:29,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994870178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:29,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:29,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-16 14:03:29,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37892811] [2022-02-16 14:03:29,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:29,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:03:29,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:29,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:03:29,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:03:29,279 INFO L87 Difference]: Start difference. First operand 427 states and 649 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2022-02-16 14:03:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:29,655 INFO L93 Difference]: Finished difference Result 605 states and 880 transitions. [2022-02-16 14:03:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:03:29,655 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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 28 [2022-02-16 14:03:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:29,657 INFO L225 Difference]: With dead ends: 605 [2022-02-16 14:03:29,657 INFO L226 Difference]: Without dead ends: 592 [2022-02-16 14:03:29,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=445, Invalid=1447, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:03:29,659 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 124 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:29,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 131 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-16 14:03:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 377. [2022-02-16 14:03:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.5159574468085106) internal successors, (570), 376 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 570 transitions. [2022-02-16 14:03:29,666 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 570 transitions. Word has length 28 [2022-02-16 14:03:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:29,666 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 570 transitions. [2022-02-16 14:03:29,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2022-02-16 14:03:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 570 transitions. [2022-02-16 14:03:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:29,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:29,667 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:29,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:29,880 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 [2022-02-16 14:03:29,880 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:29,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1317456061, now seen corresponding path program 28 times [2022-02-16 14:03:29,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:29,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424909359] [2022-02-16 14:03:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:29,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:29,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:29,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424909359] [2022-02-16 14:03:29,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424909359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:29,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948221608] [2022-02-16 14:03:29,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:03:29,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:29,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:29,962 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) [2022-02-16 14:03:29,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 14:03:29,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:03:29,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:30,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:30,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948221608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:30,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:30,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-02-16 14:03:30,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877985586] [2022-02-16 14:03:30,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:30,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:03:30,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:03:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:03:30,326 INFO L87 Difference]: Start difference. First operand 377 states and 570 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-02-16 14:03:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:31,275 INFO L93 Difference]: Finished difference Result 861 states and 1221 transitions. [2022-02-16 14:03:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:03:31,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 28 [2022-02-16 14:03:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:31,278 INFO L225 Difference]: With dead ends: 861 [2022-02-16 14:03:31,278 INFO L226 Difference]: Without dead ends: 861 [2022-02-16 14:03:31,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1724, Invalid=4282, Unknown=0, NotChecked=0, Total=6006 [2022-02-16 14:03:31,280 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 280 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:31,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 140 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-02-16 14:03:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 419. [2022-02-16 14:03:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.5191387559808613) internal successors, (635), 418 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 635 transitions. [2022-02-16 14:03:31,292 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 635 transitions. Word has length 28 [2022-02-16 14:03:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:31,292 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 635 transitions. [2022-02-16 14:03:31,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-02-16 14:03:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 635 transitions. [2022-02-16 14:03:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:31,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:31,293 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:31,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:31,515 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 [2022-02-16 14:03:31,515 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2067349187, now seen corresponding path program 29 times [2022-02-16 14:03:31,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:31,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665893416] [2022-02-16 14:03:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:31,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:31,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:31,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665893416] [2022-02-16 14:03:31,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665893416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:31,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070649976] [2022-02-16 14:03:31,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:03:31,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:31,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:31,590 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) [2022-02-16 14:03:31,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 14:03:31,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:03:31,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:31,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:31,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:31,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:31,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070649976] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:31,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:31,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-02-16 14:03:31,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310884803] [2022-02-16 14:03:31,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:31,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:03:31,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:03:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:03:31,931 INFO L87 Difference]: Start difference. First operand 419 states and 635 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:32,315 INFO L93 Difference]: Finished difference Result 548 states and 805 transitions. [2022-02-16 14:03:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:03:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:03:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:32,317 INFO L225 Difference]: With dead ends: 548 [2022-02-16 14:03:32,317 INFO L226 Difference]: Without dead ends: 539 [2022-02-16 14:03:32,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:03:32,318 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:32,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 151 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-02-16 14:03:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 429. [2022-02-16 14:03:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.516355140186916) internal successors, (649), 428 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 649 transitions. [2022-02-16 14:03:32,326 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 649 transitions. Word has length 28 [2022-02-16 14:03:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:32,326 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 649 transitions. [2022-02-16 14:03:32,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 649 transitions. [2022-02-16 14:03:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:03:32,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:32,328 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:32,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:32,550 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 [2022-02-16 14:03:32,551 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash -631136391, now seen corresponding path program 30 times [2022-02-16 14:03:32,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:32,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470061617] [2022-02-16 14:03:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:32,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:32,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:32,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470061617] [2022-02-16 14:03:32,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470061617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:32,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522739147] [2022-02-16 14:03:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:03:32,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:32,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:32,629 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) [2022-02-16 14:03:32,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 14:03:32,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:03:32,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:03:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:32,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:33,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522739147] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:33,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:33,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-02-16 14:03:33,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967007882] [2022-02-16 14:03:33,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:33,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:03:33,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:03:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:03:33,028 INFO L87 Difference]: Start difference. First operand 429 states and 649 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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) [2022-02-16 14:03:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:34,092 INFO L93 Difference]: Finished difference Result 1038 states and 1508 transitions. [2022-02-16 14:03:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:03:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:03:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:34,095 INFO L225 Difference]: With dead ends: 1038 [2022-02-16 14:03:34,095 INFO L226 Difference]: Without dead ends: 1038 [2022-02-16 14:03:34,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2263, Invalid=5393, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:03:34,100 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 256 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:34,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 121 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-02-16 14:03:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 694. [2022-02-16 14:03:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 1.5483405483405484) internal successors, (1073), 693 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1073 transitions. [2022-02-16 14:03:34,115 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1073 transitions. Word has length 28 [2022-02-16 14:03:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:34,116 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1073 transitions. [2022-02-16 14:03:34,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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) [2022-02-16 14:03:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1073 transitions. [2022-02-16 14:03:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:03:34,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:34,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:34,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:34,339 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 [2022-02-16 14:03:34,339 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash 791131335, now seen corresponding path program 31 times [2022-02-16 14:03:34,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:34,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823394018] [2022-02-16 14:03:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:34,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:34,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:34,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823394018] [2022-02-16 14:03:34,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823394018] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:34,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537540676] [2022-02-16 14:03:34,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:03:34,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:34,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:34,378 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) [2022-02-16 14:03:34,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 14:03:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:34,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:03:34,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:34,516 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-02-16 14:03:34,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 65 [2022-02-16 14:03:35,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:35,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 96 [2022-02-16 14:03:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:35,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:36,082 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-02-16 14:03:36,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-02-16 14:03:36,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:36,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-02-16 14:03:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:36,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537540676] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:36,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:36,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 17 [2022-02-16 14:03:36,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398543126] [2022-02-16 14:03:36,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:36,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:03:36,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:03:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:03:36,180 INFO L87 Difference]: Start difference. First operand 694 states and 1073 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:36,253 INFO L93 Difference]: Finished difference Result 1065 states and 1602 transitions. [2022-02-16 14:03:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:03:36,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:03:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:36,256 INFO L225 Difference]: With dead ends: 1065 [2022-02-16 14:03:36,256 INFO L226 Difference]: Without dead ends: 1061 [2022-02-16 14:03:36,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:03:36,257 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 85 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:36,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 509 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-02-16 14:03:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-02-16 14:03:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 889. [2022-02-16 14:03:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 1.5653153153153154) internal successors, (1390), 888 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1390 transitions. [2022-02-16 14:03:36,272 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1390 transitions. Word has length 30 [2022-02-16 14:03:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:36,272 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1390 transitions. [2022-02-16 14:03:36,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1390 transitions. [2022-02-16 14:03:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:03:36,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:36,274 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:36,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:36,497 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 [2022-02-16 14:03:36,497 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:36,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:36,498 INFO L85 PathProgramCache]: Analyzing trace with hash 531270071, now seen corresponding path program 32 times [2022-02-16 14:03:36,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:36,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211437070] [2022-02-16 14:03:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:36,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:36,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:36,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211437070] [2022-02-16 14:03:36,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211437070] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:36,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815596726] [2022-02-16 14:03:36,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:03:36,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:36,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:36,544 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) [2022-02-16 14:03:36,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 14:03:36,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:03:36,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:03:36,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:36,806 INFO L353 Elim1Store]: treesize reduction 122, result has 32.6 percent of original size [2022-02-16 14:03:36,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 91 [2022-02-16 14:03:36,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:36,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 93 [2022-02-16 14:03:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:36,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:37,134 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-02-16 14:03:37,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 84 [2022-02-16 14:03:37,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:37,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-02-16 14:03:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:37,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815596726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:37,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:37,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2022-02-16 14:03:37,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53691439] [2022-02-16 14:03:37,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:37,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:03:37,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:03:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:03:37,233 INFO L87 Difference]: Start difference. First operand 889 states and 1390 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:37,393 INFO L93 Difference]: Finished difference Result 1178 states and 1796 transitions. [2022-02-16 14:03:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 14:03:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:03:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:37,396 INFO L225 Difference]: With dead ends: 1178 [2022-02-16 14:03:37,396 INFO L226 Difference]: Without dead ends: 1170 [2022-02-16 14:03:37,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:03:37,397 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 123 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:37,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 425 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-02-16 14:03:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1036. [2022-02-16 14:03:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 1.5806763285024155) internal successors, (1636), 1035 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1636 transitions. [2022-02-16 14:03:37,413 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1636 transitions. Word has length 30 [2022-02-16 14:03:37,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:37,413 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 1636 transitions. [2022-02-16 14:03:37,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:37,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1636 transitions. [2022-02-16 14:03:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:03:37,415 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:37,415 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:37,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:37,637 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 [2022-02-16 14:03:37,638 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:37,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:37,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1927843255, now seen corresponding path program 33 times [2022-02-16 14:03:37,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:37,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372132482] [2022-02-16 14:03:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:37,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:37,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:37,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372132482] [2022-02-16 14:03:37,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372132482] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:37,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480257970] [2022-02-16 14:03:37,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:37,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:37,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:37,682 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) [2022-02-16 14:03:37,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 14:03:37,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-16 14:03:37,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:37,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:03:37,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:37,940 INFO L353 Elim1Store]: treesize reduction 103, result has 31.8 percent of original size [2022-02-16 14:03:37,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 123 treesize of output 94 [2022-02-16 14:03:37,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:37,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 93 [2022-02-16 14:03:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:38,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:38,294 INFO L353 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2022-02-16 14:03:38,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 114 [2022-02-16 14:03:38,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:38,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 100 [2022-02-16 14:03:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:38,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480257970] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:38,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:38,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-02-16 14:03:38,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140825473] [2022-02-16 14:03:38,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:38,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:03:38,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:03:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:03:38,368 INFO L87 Difference]: Start difference. First operand 1036 states and 1636 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:38,543 INFO L93 Difference]: Finished difference Result 1219 states and 1884 transitions. [2022-02-16 14:03:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 14:03:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:03:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:38,546 INFO L225 Difference]: With dead ends: 1219 [2022-02-16 14:03:38,546 INFO L226 Difference]: Without dead ends: 1213 [2022-02-16 14:03:38,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:03:38,546 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 102 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:38,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 543 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-02-16 14:03:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1121. [2022-02-16 14:03:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5857142857142856) internal successors, (1776), 1120 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1776 transitions. [2022-02-16 14:03:38,564 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1776 transitions. Word has length 30 [2022-02-16 14:03:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1776 transitions. [2022-02-16 14:03:38,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1776 transitions. [2022-02-16 14:03:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:03:38,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:38,567 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:38,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-16 14:03:38,788 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 [2022-02-16 14:03:38,788 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash -290090569, now seen corresponding path program 34 times [2022-02-16 14:03:38,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:38,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797287436] [2022-02-16 14:03:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:38,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:38,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:38,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797287436] [2022-02-16 14:03:38,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797287436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:38,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171004975] [2022-02-16 14:03:38,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:03:38,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:38,845 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) [2022-02-16 14:03:38,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 14:03:38,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:03:38,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:03:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:38,983 INFO L353 Elim1Store]: treesize reduction 16, result has 70.9 percent of original size [2022-02-16 14:03:38,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 69 [2022-02-16 14:03:39,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:39,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 93 [2022-02-16 14:03:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:39,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:39,834 INFO L353 Elim1Store]: treesize reduction 80, result has 33.9 percent of original size [2022-02-16 14:03:39,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 112 [2022-02-16 14:03:39,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:39,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-02-16 14:03:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:39,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171004975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:39,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:39,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 18 [2022-02-16 14:03:39,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84740220] [2022-02-16 14:03:39,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:39,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:03:39,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:39,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:03:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:03:39,912 INFO L87 Difference]: Start difference. First operand 1121 states and 1776 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:40,031 INFO L93 Difference]: Finished difference Result 1336 states and 2054 transitions. [2022-02-16 14:03:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 14:03:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:03:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:40,035 INFO L225 Difference]: With dead ends: 1336 [2022-02-16 14:03:40,035 INFO L226 Difference]: Without dead ends: 1326 [2022-02-16 14:03:40,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:03:40,035 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 129 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:40,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 477 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 295 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-02-16 14:03:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-02-16 14:03:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1132. [2022-02-16 14:03:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.5915119363395225) internal successors, (1800), 1131 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1800 transitions. [2022-02-16 14:03:40,054 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1800 transitions. Word has length 30 [2022-02-16 14:03:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:40,054 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1800 transitions. [2022-02-16 14:03:40,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1800 transitions. [2022-02-16 14:03:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:03:40,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:40,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:40,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:40,279 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 [2022-02-16 14:03:40,280 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1420716617, now seen corresponding path program 35 times [2022-02-16 14:03:40,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:40,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775527845] [2022-02-16 14:03:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:40,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:40,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:40,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775527845] [2022-02-16 14:03:40,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775527845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:40,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986197026] [2022-02-16 14:03:40,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:03:40,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:40,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:40,320 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) [2022-02-16 14:03:40,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 14:03:40,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:03:40,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:40,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:03:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:40,466 INFO L353 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2022-02-16 14:03:40,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 75 [2022-02-16 14:03:41,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:41,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 96 [2022-02-16 14:03:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:41,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:41,946 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-02-16 14:03:41,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-02-16 14:03:41,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:03:41,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-02-16 14:03:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:03:42,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986197026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:42,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:42,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 18 [2022-02-16 14:03:42,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234745145] [2022-02-16 14:03:42,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:42,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:03:42,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:42,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:03:42,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:03:42,058 INFO L87 Difference]: Start difference. First operand 1132 states and 1800 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:42,149 INFO L93 Difference]: Finished difference Result 1455 states and 2257 transitions. [2022-02-16 14:03:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:03:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:03:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:42,153 INFO L225 Difference]: With dead ends: 1455 [2022-02-16 14:03:42,153 INFO L226 Difference]: Without dead ends: 1451 [2022-02-16 14:03:42,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:03:42,153 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 95 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:42,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 493 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 175 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-02-16 14:03:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-02-16 14:03:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1265. [2022-02-16 14:03:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.5909810126582278) internal successors, (2011), 1264 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2011 transitions. [2022-02-16 14:03:42,175 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2011 transitions. Word has length 30 [2022-02-16 14:03:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 2011 transitions. [2022-02-16 14:03:42,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2011 transitions. [2022-02-16 14:03:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:42,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:42,177 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:42,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-16 14:03:42,388 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 [2022-02-16 14:03:42,388 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:42,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:42,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1819729847, now seen corresponding path program 36 times [2022-02-16 14:03:42,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:42,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949198265] [2022-02-16 14:03:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:42,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:42,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:42,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949198265] [2022-02-16 14:03:42,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949198265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:42,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929927092] [2022-02-16 14:03:42,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:03:42,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:42,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:42,500 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) [2022-02-16 14:03:42,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 14:03:42,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-16 14:03:42,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:42,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:42,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:42,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929927092] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:42,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:42,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-16 14:03:42,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102907668] [2022-02-16 14:03:42,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:42,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:03:42,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:03:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:03:42,928 INFO L87 Difference]: Start difference. First operand 1265 states and 2011 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:44,044 INFO L93 Difference]: Finished difference Result 1800 states and 2721 transitions. [2022-02-16 14:03:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:03:44,044 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:44,048 INFO L225 Difference]: With dead ends: 1800 [2022-02-16 14:03:44,048 INFO L226 Difference]: Without dead ends: 1800 [2022-02-16 14:03:44,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1960, Invalid=5696, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:03:44,049 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 183 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:44,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 128 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-02-16 14:03:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1113. [2022-02-16 14:03:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 1.579136690647482) internal successors, (1756), 1112 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1756 transitions. [2022-02-16 14:03:44,067 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1756 transitions. Word has length 32 [2022-02-16 14:03:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:44,067 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1756 transitions. [2022-02-16 14:03:44,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1756 transitions. [2022-02-16 14:03:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:44,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:44,069 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:44,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:44,283 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 [2022-02-16 14:03:44,283 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1527560393, now seen corresponding path program 37 times [2022-02-16 14:03:44,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:44,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112335305] [2022-02-16 14:03:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:44,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:44,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:44,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112335305] [2022-02-16 14:03:44,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112335305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:44,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667217190] [2022-02-16 14:03:44,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:03:44,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:44,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:44,381 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) [2022-02-16 14:03:44,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-16 14:03:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:44,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:44,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:44,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667217190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:44,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:44,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-02-16 14:03:44,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158819320] [2022-02-16 14:03:44,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:44,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 14:03:44,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:44,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 14:03:44,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:03:44,771 INFO L87 Difference]: Start difference. First operand 1113 states and 1756 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-02-16 14:03:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:45,664 INFO L93 Difference]: Finished difference Result 1944 states and 2895 transitions. [2022-02-16 14:03:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 14:03:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:45,669 INFO L225 Difference]: With dead ends: 1944 [2022-02-16 14:03:45,669 INFO L226 Difference]: Without dead ends: 1921 [2022-02-16 14:03:45,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2022-02-16 14:03:45,670 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 443 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:45,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 156 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-02-16 14:03:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1154. [2022-02-16 14:03:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 1.5611448395490026) internal successors, (1800), 1153 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1800 transitions. [2022-02-16 14:03:45,691 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1800 transitions. Word has length 32 [2022-02-16 14:03:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:45,691 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1800 transitions. [2022-02-16 14:03:45,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-02-16 14:03:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1800 transitions. [2022-02-16 14:03:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:45,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:45,694 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:45,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:45,907 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 [2022-02-16 14:03:45,907 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash 908988857, now seen corresponding path program 38 times [2022-02-16 14:03:45,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:45,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81867231] [2022-02-16 14:03:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:45,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:45,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:45,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81867231] [2022-02-16 14:03:45,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81867231] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:45,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974933591] [2022-02-16 14:03:45,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:03:45,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:45,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:45,985 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) [2022-02-16 14:03:45,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-16 14:03:46,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:03:46,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:46,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:46,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974933591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:46,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:46,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-02-16 14:03:46,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225455376] [2022-02-16 14:03:46,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:46,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 14:03:46,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:46,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 14:03:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:03:46,446 INFO L87 Difference]: Start difference. First operand 1154 states and 1800 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:47,272 INFO L93 Difference]: Finished difference Result 2015 states and 3084 transitions. [2022-02-16 14:03:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-16 14:03:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:47,278 INFO L225 Difference]: With dead ends: 2015 [2022-02-16 14:03:47,278 INFO L226 Difference]: Without dead ends: 2003 [2022-02-16 14:03:47,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1283, Invalid=3687, Unknown=0, NotChecked=0, Total=4970 [2022-02-16 14:03:47,279 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 250 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:47,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 130 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-02-16 14:03:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1494. [2022-02-16 14:03:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 1.5746818486269256) internal successors, (2351), 1493 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2351 transitions. [2022-02-16 14:03:47,313 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2351 transitions. Word has length 32 [2022-02-16 14:03:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:47,314 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 2351 transitions. [2022-02-16 14:03:47,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2351 transitions. [2022-02-16 14:03:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:47,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:47,315 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:47,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-16 14:03:47,515 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 [2022-02-16 14:03:47,516 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1161034379, now seen corresponding path program 39 times [2022-02-16 14:03:47,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:47,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922682745] [2022-02-16 14:03:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:47,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:47,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:47,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922682745] [2022-02-16 14:03:47,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922682745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:47,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325435226] [2022-02-16 14:03:47,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:47,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:47,606 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) [2022-02-16 14:03:47,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-16 14:03:47,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-16 14:03:47,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:47,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:47,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:48,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325435226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:48,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:48,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-02-16 14:03:48,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545776051] [2022-02-16 14:03:48,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:48,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 14:03:48,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 14:03:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:03:48,088 INFO L87 Difference]: Start difference. First operand 1494 states and 2351 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:49,365 INFO L93 Difference]: Finished difference Result 1978 states and 3014 transitions. [2022-02-16 14:03:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-16 14:03:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:49,371 INFO L225 Difference]: With dead ends: 1978 [2022-02-16 14:03:49,372 INFO L226 Difference]: Without dead ends: 1978 [2022-02-16 14:03:49,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2372, Invalid=6184, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 14:03:49,373 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:49,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 162 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:03:49,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-02-16 14:03:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1336. [2022-02-16 14:03:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 1.5550561797752809) internal successors, (2076), 1335 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2076 transitions. [2022-02-16 14:03:49,389 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2076 transitions. Word has length 32 [2022-02-16 14:03:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:49,389 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2076 transitions. [2022-02-16 14:03:49,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2076 transitions. [2022-02-16 14:03:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:49,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:49,391 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:49,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:49,591 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 [2022-02-16 14:03:49,591 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash -681354491, now seen corresponding path program 40 times [2022-02-16 14:03:49,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:49,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358271076] [2022-02-16 14:03:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:49,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:49,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:49,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358271076] [2022-02-16 14:03:49,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358271076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:49,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288499345] [2022-02-16 14:03:49,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:03:49,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:49,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:49,695 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) [2022-02-16 14:03:49,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-16 14:03:49,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:03:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:49,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:50,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288499345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:50,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:50,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-02-16 14:03:50,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895523850] [2022-02-16 14:03:50,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:50,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:03:50,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:03:50,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:03:50,102 INFO L87 Difference]: Start difference. First operand 1336 states and 2076 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:51,292 INFO L93 Difference]: Finished difference Result 2047 states and 3001 transitions. [2022-02-16 14:03:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-16 14:03:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:51,296 INFO L225 Difference]: With dead ends: 2047 [2022-02-16 14:03:51,297 INFO L226 Difference]: Without dead ends: 2047 [2022-02-16 14:03:51,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2022-02-16 14:03:51,298 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 251 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:51,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 161 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2022-02-16 14:03:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1186. [2022-02-16 14:03:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 1.549367088607595) internal successors, (1836), 1185 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1836 transitions. [2022-02-16 14:03:51,315 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1836 transitions. Word has length 32 [2022-02-16 14:03:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:51,315 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1836 transitions. [2022-02-16 14:03:51,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1836 transitions. [2022-02-16 14:03:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:51,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:51,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:51,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-16 14:03:51,517 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 [2022-02-16 14:03:51,518 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2081221755, now seen corresponding path program 41 times [2022-02-16 14:03:51,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:51,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815577773] [2022-02-16 14:03:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:51,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:51,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:51,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815577773] [2022-02-16 14:03:51,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815577773] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:51,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002568858] [2022-02-16 14:03:51,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:03:51,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:51,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:51,608 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) [2022-02-16 14:03:51,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-16 14:03:51,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:03:51,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:51,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:51,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:51,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:52,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002568858] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:52,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:52,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-02-16 14:03:52,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312928746] [2022-02-16 14:03:52,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 14:03:52,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 14:03:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:03:52,005 INFO L87 Difference]: Start difference. First operand 1186 states and 1836 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2022-02-16 14:03:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:52,556 INFO L93 Difference]: Finished difference Result 1575 states and 2353 transitions. [2022-02-16 14:03:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 14:03:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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 32 [2022-02-16 14:03:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:52,559 INFO L225 Difference]: With dead ends: 1575 [2022-02-16 14:03:52,560 INFO L226 Difference]: Without dead ends: 1557 [2022-02-16 14:03:52,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=752, Invalid=2554, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:03:52,561 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:52,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 165 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2022-02-16 14:03:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1117. [2022-02-16 14:03:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.543010752688172) internal successors, (1722), 1116 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1722 transitions. [2022-02-16 14:03:52,574 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1722 transitions. Word has length 32 [2022-02-16 14:03:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:52,575 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1722 transitions. [2022-02-16 14:03:52,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2022-02-16 14:03:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1722 transitions. [2022-02-16 14:03:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:52,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:52,576 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:52,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-16 14:03:52,784 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 [2022-02-16 14:03:52,785 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash -322628415, now seen corresponding path program 42 times [2022-02-16 14:03:52,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:52,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703384733] [2022-02-16 14:03:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:52,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:52,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:52,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703384733] [2022-02-16 14:03:52,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703384733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:52,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516811061] [2022-02-16 14:03:52,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:03:52,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:52,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:52,886 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) [2022-02-16 14:03:52,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-16 14:03:52,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-16 14:03:52,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:52,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:53,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:53,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516811061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:53,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:53,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-02-16 14:03:53,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163713596] [2022-02-16 14:03:53,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:53,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:03:53,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:03:53,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:03:53,341 INFO L87 Difference]: Start difference. First operand 1117 states and 1722 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:54,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:54,692 INFO L93 Difference]: Finished difference Result 1969 states and 2876 transitions. [2022-02-16 14:03:54,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-16 14:03:54,693 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:54,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:54,696 INFO L225 Difference]: With dead ends: 1969 [2022-02-16 14:03:54,696 INFO L226 Difference]: Without dead ends: 1969 [2022-02-16 14:03:54,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2684, Invalid=7018, Unknown=0, NotChecked=0, Total=9702 [2022-02-16 14:03:54,697 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 305 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:54,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 156 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:03:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2022-02-16 14:03:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 985. [2022-02-16 14:03:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 1.535569105691057) internal successors, (1511), 984 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1511 transitions. [2022-02-16 14:03:54,712 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1511 transitions. Word has length 32 [2022-02-16 14:03:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:54,713 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1511 transitions. [2022-02-16 14:03:54,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1511 transitions. [2022-02-16 14:03:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:54,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:54,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:54,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:54,939 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 [2022-02-16 14:03:54,939 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1830228671, now seen corresponding path program 43 times [2022-02-16 14:03:54,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:54,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726254879] [2022-02-16 14:03:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:54,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:55,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:55,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726254879] [2022-02-16 14:03:55,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726254879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:55,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458892038] [2022-02-16 14:03:55,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:03:55,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:55,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:55,039 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) [2022-02-16 14:03:55,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-16 14:03:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:55,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:55,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:55,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458892038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:55,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:55,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-02-16 14:03:55,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707252249] [2022-02-16 14:03:55,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:55,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 14:03:55,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 14:03:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:03:55,491 INFO L87 Difference]: Start difference. First operand 985 states and 1511 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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) [2022-02-16 14:03:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:56,031 INFO L93 Difference]: Finished difference Result 1303 states and 1944 transitions. [2022-02-16 14:03:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 14:03:56,031 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:56,033 INFO L225 Difference]: With dead ends: 1303 [2022-02-16 14:03:56,033 INFO L226 Difference]: Without dead ends: 1289 [2022-02-16 14:03:56,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=712, Invalid=2368, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:03:56,034 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 175 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:56,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 192 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-02-16 14:03:56,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 945. [2022-02-16 14:03:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 1.5307203389830508) internal successors, (1445), 944 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1445 transitions. [2022-02-16 14:03:56,045 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1445 transitions. Word has length 32 [2022-02-16 14:03:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:56,045 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1445 transitions. [2022-02-16 14:03:56,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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) [2022-02-16 14:03:56,045 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1445 transitions. [2022-02-16 14:03:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:56,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:56,046 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:56,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-16 14:03:56,247 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 [2022-02-16 14:03:56,248 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1031933309, now seen corresponding path program 44 times [2022-02-16 14:03:56,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:56,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939396046] [2022-02-16 14:03:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:56,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:56,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:56,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939396046] [2022-02-16 14:03:56,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939396046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:56,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112809449] [2022-02-16 14:03:56,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:03:56,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:56,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:56,360 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) [2022-02-16 14:03:56,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-16 14:03:56,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:03:56,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:56,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:56,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112809449] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:56,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:56,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-02-16 14:03:56,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252089063] [2022-02-16 14:03:56,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:56,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:03:56,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:56,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:03:56,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:03:56,913 INFO L87 Difference]: Start difference. First operand 945 states and 1445 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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) [2022-02-16 14:03:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:58,537 INFO L93 Difference]: Finished difference Result 2003 states and 2920 transitions. [2022-02-16 14:03:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-16 14:03:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:58,540 INFO L225 Difference]: With dead ends: 2003 [2022-02-16 14:03:58,540 INFO L226 Difference]: Without dead ends: 2003 [2022-02-16 14:03:58,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5014 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3596, Invalid=8836, Unknown=0, NotChecked=0, Total=12432 [2022-02-16 14:03:58,542 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 373 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:58,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 181 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:03:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-02-16 14:03:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1089. [2022-02-16 14:03:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 1.53125) internal successors, (1666), 1088 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1666 transitions. [2022-02-16 14:03:58,558 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1666 transitions. Word has length 32 [2022-02-16 14:03:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:58,558 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1666 transitions. [2022-02-16 14:03:58,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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) [2022-02-16 14:03:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1666 transitions. [2022-02-16 14:03:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:58,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:58,559 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:58,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-16 14:03:58,760 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 [2022-02-16 14:03:58,760 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1942095357, now seen corresponding path program 45 times [2022-02-16 14:03:58,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:58,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293730449] [2022-02-16 14:03:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:58,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:03:58,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:58,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293730449] [2022-02-16 14:03:58,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293730449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:58,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447882116] [2022-02-16 14:03:58,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:58,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:58,859 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) [2022-02-16 14:03:58,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-16 14:03:58,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:03:58,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:03:58,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:59,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:59,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447882116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:59,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:59,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-02-16 14:03:59,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068948772] [2022-02-16 14:03:59,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:59,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 14:03:59,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 14:03:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:03:59,303 INFO L87 Difference]: Start difference. First operand 1089 states and 1666 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:59,836 INFO L93 Difference]: Finished difference Result 1289 states and 1936 transitions. [2022-02-16 14:03:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:03:59,836 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:59,838 INFO L225 Difference]: With dead ends: 1289 [2022-02-16 14:03:59,838 INFO L226 Difference]: Without dead ends: 1280 [2022-02-16 14:03:59,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=713, Invalid=2257, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:03:59,839 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:59,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 198 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:03:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-02-16 14:03:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1117. [2022-02-16 14:03:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.528673835125448) internal successors, (1706), 1116 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1706 transitions. [2022-02-16 14:03:59,855 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1706 transitions. Word has length 32 [2022-02-16 14:03:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:59,855 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1706 transitions. [2022-02-16 14:03:59,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1706 transitions. [2022-02-16 14:03:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:59,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:59,857 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:59,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:00,071 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 [2022-02-16 14:04:00,071 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash 358483257, now seen corresponding path program 46 times [2022-02-16 14:04:00,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:00,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020928319] [2022-02-16 14:04:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:00,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:00,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:00,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020928319] [2022-02-16 14:04:00,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020928319] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:00,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674025015] [2022-02-16 14:04:00,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:00,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:00,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:00,163 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) [2022-02-16 14:04:00,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-16 14:04:00,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:00,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:00,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:04:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:00,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:00,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674025015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:00,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:00,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-02-16 14:04:00,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918590252] [2022-02-16 14:04:00,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:00,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:04:00,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:00,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:04:00,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:04:00,643 INFO L87 Difference]: Start difference. First operand 1117 states and 1706 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:02,400 INFO L93 Difference]: Finished difference Result 2511 states and 3731 transitions. [2022-02-16 14:04:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-16 14:04:02,400 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:04:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:02,404 INFO L225 Difference]: With dead ends: 2511 [2022-02-16 14:04:02,404 INFO L226 Difference]: Without dead ends: 2511 [2022-02-16 14:04:02,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6392 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4449, Invalid=10803, Unknown=0, NotChecked=0, Total=15252 [2022-02-16 14:04:02,406 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 472 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:02,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 96 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2022-02-16 14:04:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1851. [2022-02-16 14:04:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1850 states have (on average 1.5502702702702702) internal successors, (2868), 1850 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 2868 transitions. [2022-02-16 14:04:02,444 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 2868 transitions. Word has length 32 [2022-02-16 14:04:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:02,444 INFO L470 AbstractCegarLoop]: Abstraction has 1851 states and 2868 transitions. [2022-02-16 14:04:02,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 2868 transitions. [2022-02-16 14:04:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:04:02,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:02,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:02,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-16 14:04:02,663 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 [2022-02-16 14:04:02,663 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:02,664 INFO L85 PathProgramCache]: Analyzing trace with hash 750865355, now seen corresponding path program 47 times [2022-02-16 14:04:02,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:02,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953806581] [2022-02-16 14:04:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:02,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:02,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:02,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953806581] [2022-02-16 14:04:02,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953806581] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:02,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931498045] [2022-02-16 14:04:02,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:02,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:02,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:02,722 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) [2022-02-16 14:04:02,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-16 14:04:02,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-16 14:04:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-16 14:04:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:03,013 INFO L353 Elim1Store]: treesize reduction 72, result has 40.5 percent of original size [2022-02-16 14:04:03,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 124 treesize of output 105 [2022-02-16 14:04:06,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:06,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-02-16 14:04:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:07,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:07,244 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-16 14:04:07,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-02-16 14:04:07,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:07,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-02-16 14:04:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:07,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931498045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:07,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:07,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 23 [2022-02-16 14:04:07,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880995999] [2022-02-16 14:04:07,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:07,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:04:07,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:04:07,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:04:07,409 INFO L87 Difference]: Start difference. First operand 1851 states and 2868 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 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) [2022-02-16 14:04:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:07,592 INFO L93 Difference]: Finished difference Result 2438 states and 3750 transitions. [2022-02-16 14:04:07,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 14:04:07,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 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 34 [2022-02-16 14:04:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:07,597 INFO L225 Difference]: With dead ends: 2438 [2022-02-16 14:04:07,597 INFO L226 Difference]: Without dead ends: 2434 [2022-02-16 14:04:07,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:04:07,597 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:07,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 720 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2022-02-16 14:04:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2022-02-16 14:04:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2264. [2022-02-16 14:04:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 1.566504639858595) internal successors, (3545), 2263 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3545 transitions. [2022-02-16 14:04:07,642 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3545 transitions. Word has length 34 [2022-02-16 14:04:07,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:07,643 INFO L470 AbstractCegarLoop]: Abstraction has 2264 states and 3545 transitions. [2022-02-16 14:04:07,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 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) [2022-02-16 14:04:07,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3545 transitions. [2022-02-16 14:04:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:04:07,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:07,646 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:07,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:07,859 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 [2022-02-16 14:04:07,859 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:07,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:07,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1937729417, now seen corresponding path program 48 times [2022-02-16 14:04:07,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:07,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978075553] [2022-02-16 14:04:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:07,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:07,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:07,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978075553] [2022-02-16 14:04:07,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978075553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:07,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839793143] [2022-02-16 14:04:07,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:04:07,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:07,915 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:07,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-16 14:04:07,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-16 14:04:07,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:07,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-16 14:04:07,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:08,378 INFO L353 Elim1Store]: treesize reduction 347, result has 22.7 percent of original size [2022-02-16 14:04:08,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 158 treesize of output 156 [2022-02-16 14:04:08,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:08,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 144 [2022-02-16 14:04:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:08,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:08,789 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-16 14:04:08,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 114 [2022-02-16 14:04:08,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:08,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 152 [2022-02-16 14:04:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:08,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839793143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:08,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:08,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-02-16 14:04:08,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392038065] [2022-02-16 14:04:08,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:08,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:04:08,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:04:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:04:08,958 INFO L87 Difference]: Start difference. First operand 2264 states and 3545 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:09,197 INFO L93 Difference]: Finished difference Result 2701 states and 4204 transitions. [2022-02-16 14:04:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 14:04:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-16 14:04:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:09,202 INFO L225 Difference]: With dead ends: 2701 [2022-02-16 14:04:09,202 INFO L226 Difference]: Without dead ends: 2697 [2022-02-16 14:04:09,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:04:09,203 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 103 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:09,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 745 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2022-02-16 14:04:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2597. [2022-02-16 14:04:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 1.5789676425269645) internal successors, (4099), 2596 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 4099 transitions. [2022-02-16 14:04:09,242 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 4099 transitions. Word has length 34 [2022-02-16 14:04:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:09,242 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 4099 transitions. [2022-02-16 14:04:09,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 4099 transitions. [2022-02-16 14:04:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:04:09,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:09,246 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:09,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-16 14:04:09,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:09,468 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash 805010807, now seen corresponding path program 49 times [2022-02-16 14:04:09,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:09,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320230181] [2022-02-16 14:04:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:09,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:09,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:09,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320230181] [2022-02-16 14:04:09,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320230181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:09,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527898398] [2022-02-16 14:04:09,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:04:09,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:09,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:09,516 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:09,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-16 14:04:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:04:09,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:09,777 INFO L353 Elim1Store]: treesize reduction 154, result has 36.1 percent of original size [2022-02-16 14:04:09,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 127 [2022-02-16 14:04:10,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:10,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 143 treesize of output 144 [2022-02-16 14:04:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:10,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:10,497 INFO L353 Elim1Store]: treesize reduction 68, result has 43.8 percent of original size [2022-02-16 14:04:10,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 128 treesize of output 134 [2022-02-16 14:04:10,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:10,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 152 [2022-02-16 14:04:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:10,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527898398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:10,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:10,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 24 [2022-02-16 14:04:10,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212148951] [2022-02-16 14:04:10,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:10,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:04:10,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:04:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:04:10,644 INFO L87 Difference]: Start difference. First operand 2597 states and 4099 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:10,891 INFO L93 Difference]: Finished difference Result 2967 states and 4612 transitions. [2022-02-16 14:04:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:04:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-16 14:04:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:10,898 INFO L225 Difference]: With dead ends: 2967 [2022-02-16 14:04:10,898 INFO L226 Difference]: Without dead ends: 2957 [2022-02-16 14:04:10,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:04:10,898 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 156 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:10,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 884 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 635 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-02-16 14:04:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-02-16 14:04:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2774. [2022-02-16 14:04:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 1.58276235124414) internal successors, (4389), 2773 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 4389 transitions. [2022-02-16 14:04:10,953 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 4389 transitions. Word has length 34 [2022-02-16 14:04:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:10,953 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 4389 transitions. [2022-02-16 14:04:10,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 4389 transitions. [2022-02-16 14:04:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:04:10,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:10,956 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:10,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:11,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-16 14:04:11,171 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash -531553673, now seen corresponding path program 50 times [2022-02-16 14:04:11,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:11,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122293314] [2022-02-16 14:04:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:11,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:11,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:11,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122293314] [2022-02-16 14:04:11,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122293314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:11,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192160800] [2022-02-16 14:04:11,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:04:11,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:11,223 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:11,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-16 14:04:11,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:04:11,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:04:11,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:11,478 INFO L353 Elim1Store]: treesize reduction 81, result has 46.4 percent of original size [2022-02-16 14:04:11,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 108 [2022-02-16 14:04:12,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:12,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 144 [2022-02-16 14:04:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:12,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:13,236 INFO L353 Elim1Store]: treesize reduction 112, result has 33.7 percent of original size [2022-02-16 14:04:13,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 128 treesize of output 150 [2022-02-16 14:04:13,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:13,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-02-16 14:04:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:13,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192160800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:13,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:13,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 23 [2022-02-16 14:04:13,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540417235] [2022-02-16 14:04:13,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:13,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:04:13,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:13,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:04:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:04:13,388 INFO L87 Difference]: Start difference. First operand 2774 states and 4389 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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) [2022-02-16 14:04:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:13,567 INFO L93 Difference]: Finished difference Result 3101 states and 4841 transitions. [2022-02-16 14:04:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:04:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-16 14:04:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:13,573 INFO L225 Difference]: With dead ends: 3101 [2022-02-16 14:04:13,573 INFO L226 Difference]: Without dead ends: 3091 [2022-02-16 14:04:13,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:04:13,574 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 159 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:13,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 696 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 442 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-02-16 14:04:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2022-02-16 14:04:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2904. [2022-02-16 14:04:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 1.5862900447812607) internal successors, (4605), 2903 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 4605 transitions. [2022-02-16 14:04:13,621 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 4605 transitions. Word has length 34 [2022-02-16 14:04:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:13,621 INFO L470 AbstractCegarLoop]: Abstraction has 2904 states and 4605 transitions. [2022-02-16 14:04:13,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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) [2022-02-16 14:04:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 4605 transitions. [2022-02-16 14:04:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:04:13,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:13,625 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:13,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:13,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-16 14:04:13,839 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:13,840 INFO L85 PathProgramCache]: Analyzing trace with hash -774797449, now seen corresponding path program 51 times [2022-02-16 14:04:13,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:13,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376515380] [2022-02-16 14:04:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:13,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:13,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:13,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376515380] [2022-02-16 14:04:13,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376515380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:13,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38618128] [2022-02-16 14:04:13,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:04:13,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:13,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:13,890 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:13,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-16 14:04:13,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-16 14:04:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-16 14:04:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:14,261 INFO L353 Elim1Store]: treesize reduction 74, result has 43.5 percent of original size [2022-02-16 14:04:14,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 158 treesize of output 123 [2022-02-16 14:04:14,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:14,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 144 [2022-02-16 14:04:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:14,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:14,828 INFO L353 Elim1Store]: treesize reduction 164, result has 27.1 percent of original size [2022-02-16 14:04:14,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 162 [2022-02-16 14:04:14,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:14,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-02-16 14:04:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:14,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38618128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:14,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:14,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-02-16 14:04:14,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575344627] [2022-02-16 14:04:14,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:14,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:04:14,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:04:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:04:14,999 INFO L87 Difference]: Start difference. First operand 2904 states and 4605 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:15,290 INFO L93 Difference]: Finished difference Result 3172 states and 4960 transitions. [2022-02-16 14:04:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 14:04:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-16 14:04:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:15,300 INFO L225 Difference]: With dead ends: 3172 [2022-02-16 14:04:15,300 INFO L226 Difference]: Without dead ends: 3166 [2022-02-16 14:04:15,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:04:15,300 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 150 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:15,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 930 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-02-16 14:04:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2878. [2022-02-16 14:04:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2877 states have (on average 1.5908932916232186) internal successors, (4577), 2877 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 4577 transitions. [2022-02-16 14:04:15,352 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 4577 transitions. Word has length 34 [2022-02-16 14:04:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:15,352 INFO L470 AbstractCegarLoop]: Abstraction has 2878 states and 4577 transitions. [2022-02-16 14:04:15,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 4577 transitions. [2022-02-16 14:04:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:04:15,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:15,356 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:15,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-16 14:04:15,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:15,571 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1691135095, now seen corresponding path program 52 times [2022-02-16 14:04:15,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:15,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760827930] [2022-02-16 14:04:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:15,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:15,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:15,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760827930] [2022-02-16 14:04:15,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760827930] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:15,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458145765] [2022-02-16 14:04:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:15,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:15,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:15,629 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:15,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-16 14:04:15,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:15,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:15,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:04:15,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:15,827 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-16 14:04:15,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2022-02-16 14:04:21,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:21,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-02-16 14:04:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:21,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:21,476 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-16 14:04:21,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-02-16 14:04:21,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:21,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-02-16 14:04:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:21,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458145765] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:21,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:21,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-02-16 14:04:21,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973736238] [2022-02-16 14:04:21,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:21,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:04:21,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:04:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:04:21,588 INFO L87 Difference]: Start difference. First operand 2878 states and 4577 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:21,741 INFO L93 Difference]: Finished difference Result 3367 states and 5253 transitions. [2022-02-16 14:04:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:04:21,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-16 14:04:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:21,745 INFO L225 Difference]: With dead ends: 3367 [2022-02-16 14:04:21,745 INFO L226 Difference]: Without dead ends: 3363 [2022-02-16 14:04:21,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:04:21,745 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 159 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:21,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 929 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 338 Invalid, 0 Unknown, 319 Unchecked, 0.1s Time] [2022-02-16 14:04:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-02-16 14:04:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3123. [2022-02-16 14:04:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.5890454836643177) internal successors, (4961), 3122 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 4961 transitions. [2022-02-16 14:04:21,781 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 4961 transitions. Word has length 34 [2022-02-16 14:04:21,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:21,781 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 4961 transitions. [2022-02-16 14:04:21,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 4961 transitions. [2022-02-16 14:04:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:21,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:21,784 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:21,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-16 14:04:21,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-16 14:04:21,984 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:21,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1671243341, now seen corresponding path program 53 times [2022-02-16 14:04:21,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:21,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103211704] [2022-02-16 14:04:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:21,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:22,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:22,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103211704] [2022-02-16 14:04:22,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103211704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:22,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537757535] [2022-02-16 14:04:22,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:22,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:22,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:22,135 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:22,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-16 14:04:22,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-16 14:04:22,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:22,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:22,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537757535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:22,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:22,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-02-16 14:04:22,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494780439] [2022-02-16 14:04:22,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:22,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:04:22,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:04:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:04:22,639 INFO L87 Difference]: Start difference. First operand 3123 states and 4961 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:24,292 INFO L93 Difference]: Finished difference Result 4069 states and 6255 transitions. [2022-02-16 14:04:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-16 14:04:24,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:24,296 INFO L225 Difference]: With dead ends: 4069 [2022-02-16 14:04:24,296 INFO L226 Difference]: Without dead ends: 4069 [2022-02-16 14:04:24,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3850 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3214, Invalid=9442, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 14:04:24,297 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 252 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:24,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 140 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4069 states. [2022-02-16 14:04:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4069 to 2782. [2022-02-16 14:04:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2781 states have (on average 1.5778496943545488) internal successors, (4388), 2781 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 4388 transitions. [2022-02-16 14:04:24,338 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 4388 transitions. Word has length 36 [2022-02-16 14:04:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:24,338 INFO L470 AbstractCegarLoop]: Abstraction has 2782 states and 4388 transitions. [2022-02-16 14:04:24,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 4388 transitions. [2022-02-16 14:04:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:24,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:24,341 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:24,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:24,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-16 14:04:24,541 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:24,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1486659277, now seen corresponding path program 54 times [2022-02-16 14:04:24,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:24,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021736963] [2022-02-16 14:04:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:24,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:24,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:24,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021736963] [2022-02-16 14:04:24,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021736963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:24,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795631065] [2022-02-16 14:04:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:04:24,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:24,660 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:24,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-16 14:04:24,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-16 14:04:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:24,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:24,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:25,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795631065] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:25,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:25,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-02-16 14:04:25,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290578840] [2022-02-16 14:04:25,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:25,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:04:25,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:04:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=907, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:04:25,155 INFO L87 Difference]: Start difference. First operand 2782 states and 4388 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:26,415 INFO L93 Difference]: Finished difference Result 4308 states and 6530 transitions. [2022-02-16 14:04:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-16 14:04:26,415 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:26,419 INFO L225 Difference]: With dead ends: 4308 [2022-02-16 14:04:26,419 INFO L226 Difference]: Without dead ends: 4280 [2022-02-16 14:04:26,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2464 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1936, Invalid=6620, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 14:04:26,420 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 421 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:26,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 209 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2022-02-16 14:04:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 2852. [2022-02-16 14:04:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 1.563661873027008) internal successors, (4458), 2851 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4458 transitions. [2022-02-16 14:04:26,453 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4458 transitions. Word has length 36 [2022-02-16 14:04:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:26,453 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 4458 transitions. [2022-02-16 14:04:26,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4458 transitions. [2022-02-16 14:04:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:26,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:26,456 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:26,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-16 14:04:26,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:26,656 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash -977571719, now seen corresponding path program 55 times [2022-02-16 14:04:26,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:26,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634060878] [2022-02-16 14:04:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:26,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:26,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:26,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634060878] [2022-02-16 14:04:26,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634060878] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:26,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932120273] [2022-02-16 14:04:26,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:04:26,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:26,752 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:26,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-16 14:04:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:27,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:27,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932120273] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:27,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:27,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-02-16 14:04:27,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517017823] [2022-02-16 14:04:27,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:27,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:04:27,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:04:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:04:27,333 INFO L87 Difference]: Start difference. First operand 2852 states and 4458 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:28,580 INFO L93 Difference]: Finished difference Result 4671 states and 7217 transitions. [2022-02-16 14:04:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-16 14:04:28,580 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:28,585 INFO L225 Difference]: With dead ends: 4671 [2022-02-16 14:04:28,585 INFO L226 Difference]: Without dead ends: 4657 [2022-02-16 14:04:28,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2205, Invalid=6351, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 14:04:28,586 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 240 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:28,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 168 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2022-02-16 14:04:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 3704. [2022-02-16 14:04:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 1.5770996489332973) internal successors, (5840), 3703 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 5840 transitions. [2022-02-16 14:04:28,639 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 5840 transitions. Word has length 36 [2022-02-16 14:04:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:28,639 INFO L470 AbstractCegarLoop]: Abstraction has 3704 states and 5840 transitions. [2022-02-16 14:04:28,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 5840 transitions. [2022-02-16 14:04:28,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:28,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:28,642 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:28,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-16 14:04:28,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:28,843 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:28,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1247372341, now seen corresponding path program 56 times [2022-02-16 14:04:28,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:28,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117757190] [2022-02-16 14:04:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:28,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:28,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:28,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117757190] [2022-02-16 14:04:28,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117757190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:28,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815546272] [2022-02-16 14:04:28,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:04:28,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:28,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:28,956 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:28,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-16 14:04:28,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:04:28,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:29,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:29,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815546272] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:29,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:29,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 36 [2022-02-16 14:04:29,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130313895] [2022-02-16 14:04:29,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:29,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-16 14:04:29,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-16 14:04:29,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:04:29,562 INFO L87 Difference]: Start difference. First operand 3704 states and 5840 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:31,468 INFO L93 Difference]: Finished difference Result 4679 states and 7184 transitions. [2022-02-16 14:04:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-16 14:04:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:31,475 INFO L225 Difference]: With dead ends: 4679 [2022-02-16 14:04:31,475 INFO L226 Difference]: Without dead ends: 4679 [2022-02-16 14:04:31,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4242, Invalid=11010, Unknown=0, NotChecked=0, Total=15252 [2022-02-16 14:04:31,476 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 269 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:31,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 219 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:04:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-02-16 14:04:31,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3275. [2022-02-16 14:04:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 1.560171044593769) internal successors, (5108), 3274 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 5108 transitions. [2022-02-16 14:04:31,526 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 5108 transitions. Word has length 36 [2022-02-16 14:04:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:31,526 INFO L470 AbstractCegarLoop]: Abstraction has 3275 states and 5108 transitions. [2022-02-16 14:04:31,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 5108 transitions. [2022-02-16 14:04:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:31,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:31,530 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:31,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-16 14:04:31,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:31,733 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1818262775, now seen corresponding path program 57 times [2022-02-16 14:04:31,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:31,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518351410] [2022-02-16 14:04:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:31,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:31,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:31,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518351410] [2022-02-16 14:04:31,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518351410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:31,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151622250] [2022-02-16 14:04:31,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:04:31,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:31,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:31,854 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:31,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-16 14:04:31,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-16 14:04:31,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:31,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:32,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:32,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151622250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:32,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:32,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-02-16 14:04:32,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235627594] [2022-02-16 14:04:32,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:32,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:04:32,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:04:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:04:32,349 INFO L87 Difference]: Start difference. First operand 3275 states and 5108 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:34,001 INFO L93 Difference]: Finished difference Result 4580 states and 6854 transitions. [2022-02-16 14:04:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-16 14:04:34,002 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:34,006 INFO L225 Difference]: With dead ends: 4580 [2022-02-16 14:04:34,006 INFO L226 Difference]: Without dead ends: 4580 [2022-02-16 14:04:34,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4063 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3257, Invalid=9625, Unknown=0, NotChecked=0, Total=12882 [2022-02-16 14:04:34,008 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 265 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:34,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 145 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2022-02-16 14:04:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 2942. [2022-02-16 14:04:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2941 states have (on average 1.5566133968038083) internal successors, (4578), 2941 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4578 transitions. [2022-02-16 14:04:34,053 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4578 transitions. Word has length 36 [2022-02-16 14:04:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:34,053 INFO L470 AbstractCegarLoop]: Abstraction has 2942 states and 4578 transitions. [2022-02-16 14:04:34,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4578 transitions. [2022-02-16 14:04:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:34,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:34,055 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:34,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-16 14:04:34,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-16 14:04:34,257 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:34,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1529027465, now seen corresponding path program 58 times [2022-02-16 14:04:34,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:34,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241071928] [2022-02-16 14:04:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:34,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:34,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:34,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241071928] [2022-02-16 14:04:34,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241071928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:34,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009321651] [2022-02-16 14:04:34,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:34,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:34,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:34,369 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:34,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-16 14:04:34,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:34,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:34,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:34,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:34,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009321651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:34,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:34,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-02-16 14:04:34,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814499735] [2022-02-16 14:04:34,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:34,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:04:34,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:04:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:04:34,851 INFO L87 Difference]: Start difference. First operand 2942 states and 4578 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:35,608 INFO L93 Difference]: Finished difference Result 3718 states and 5624 transitions. [2022-02-16 14:04:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-16 14:04:35,609 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:35,612 INFO L225 Difference]: With dead ends: 3718 [2022-02-16 14:04:35,612 INFO L226 Difference]: Without dead ends: 3695 [2022-02-16 14:04:35,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1167, Invalid=4089, Unknown=0, NotChecked=0, Total=5256 [2022-02-16 14:04:35,613 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 230 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:35,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 189 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-02-16 14:04:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 2795. [2022-02-16 14:04:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 1.5493915533285612) internal successors, (4329), 2794 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 4329 transitions. [2022-02-16 14:04:35,651 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 4329 transitions. Word has length 36 [2022-02-16 14:04:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:35,651 INFO L470 AbstractCegarLoop]: Abstraction has 2795 states and 4329 transitions. [2022-02-16 14:04:35,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 4329 transitions. [2022-02-16 14:04:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:35,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:35,654 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:35,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-16 14:04:35,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-02-16 14:04:35,854 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1690951365, now seen corresponding path program 59 times [2022-02-16 14:04:35,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:35,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854053043] [2022-02-16 14:04:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:35,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:35,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:35,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854053043] [2022-02-16 14:04:35,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854053043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:35,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946031266] [2022-02-16 14:04:35,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:35,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:35,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:35,988 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:36,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-16 14:04:36,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-16 14:04:36,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:36,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:36,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946031266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:36,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:36,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-02-16 14:04:36,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427278863] [2022-02-16 14:04:36,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:36,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:04:36,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:36,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:04:36,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:04:36,543 INFO L87 Difference]: Start difference. First operand 2795 states and 4329 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:38,407 INFO L93 Difference]: Finished difference Result 4397 states and 6544 transitions. [2022-02-16 14:04:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-16 14:04:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:38,412 INFO L225 Difference]: With dead ends: 4397 [2022-02-16 14:04:38,412 INFO L226 Difference]: Without dead ends: 4397 [2022-02-16 14:04:38,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5395 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3988, Invalid=11018, Unknown=0, NotChecked=0, Total=15006 [2022-02-16 14:04:38,413 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 368 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:38,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 198 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2022-02-16 14:04:38,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 2501. [2022-02-16 14:04:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.5468) internal successors, (3867), 2500 states have internal predecessors, (3867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 3867 transitions. [2022-02-16 14:04:38,453 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 3867 transitions. Word has length 36 [2022-02-16 14:04:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:38,453 INFO L470 AbstractCegarLoop]: Abstraction has 2501 states and 3867 transitions. [2022-02-16 14:04:38,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 3867 transitions. [2022-02-16 14:04:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:38,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:38,455 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:38,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-16 14:04:38,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-16 14:04:38,656 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:38,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash 291084101, now seen corresponding path program 60 times [2022-02-16 14:04:38,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:38,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891287117] [2022-02-16 14:04:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:38,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:38,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:38,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891287117] [2022-02-16 14:04:38,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891287117] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:38,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659255654] [2022-02-16 14:04:38,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:04:38,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:38,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:38,772 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:38,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-16 14:04:38,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-16 14:04:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:39,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:39,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659255654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:39,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:39,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-02-16 14:04:39,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797049125] [2022-02-16 14:04:39,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:39,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:04:39,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:39,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:04:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:04:39,307 INFO L87 Difference]: Start difference. First operand 2501 states and 3867 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:40,002 INFO L93 Difference]: Finished difference Result 3172 states and 4795 transitions. [2022-02-16 14:04:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:04:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:40,006 INFO L225 Difference]: With dead ends: 3172 [2022-02-16 14:04:40,006 INFO L226 Difference]: Without dead ends: 3153 [2022-02-16 14:04:40,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1113, Invalid=3857, Unknown=0, NotChecked=0, Total=4970 [2022-02-16 14:04:40,007 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 210 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:40,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 176 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2022-02-16 14:04:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 2484. [2022-02-16 14:04:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2483 states have (on average 1.5424889246878775) internal successors, (3830), 2483 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3830 transitions. [2022-02-16 14:04:40,030 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3830 transitions. Word has length 36 [2022-02-16 14:04:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:40,030 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 3830 transitions. [2022-02-16 14:04:40,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3830 transitions. [2022-02-16 14:04:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:40,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:40,032 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:40,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-16 14:04:40,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:40,233 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:40,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1357907583, now seen corresponding path program 61 times [2022-02-16 14:04:40,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:40,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345244975] [2022-02-16 14:04:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:40,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:40,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:40,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345244975] [2022-02-16 14:04:40,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345244975] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:40,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550576811] [2022-02-16 14:04:40,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:04:40,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:40,360 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:40,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-16 14:04:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:40,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:40,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550576811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:40,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:40,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-02-16 14:04:40,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502032836] [2022-02-16 14:04:40,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:40,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:04:40,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:04:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:04:40,896 INFO L87 Difference]: Start difference. First operand 2484 states and 3830 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:43,052 INFO L93 Difference]: Finished difference Result 4241 states and 6288 transitions. [2022-02-16 14:04:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-16 14:04:43,052 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:43,056 INFO L225 Difference]: With dead ends: 4241 [2022-02-16 14:04:43,056 INFO L226 Difference]: Without dead ends: 4241 [2022-02-16 14:04:43,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7542 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5243, Invalid=13389, Unknown=0, NotChecked=0, Total=18632 [2022-02-16 14:04:43,057 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 397 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:43,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 186 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:04:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2022-02-16 14:04:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2204. [2022-02-16 14:04:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.5365410803449842) internal successors, (3385), 2203 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 3385 transitions. [2022-02-16 14:04:43,091 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 3385 transitions. Word has length 36 [2022-02-16 14:04:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:43,092 INFO L470 AbstractCegarLoop]: Abstraction has 2204 states and 3385 transitions. [2022-02-16 14:04:43,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 3385 transitions. [2022-02-16 14:04:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:43,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:43,094 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:43,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-16 14:04:43,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:43,295 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:43,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1429459457, now seen corresponding path program 62 times [2022-02-16 14:04:43,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:43,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116909553] [2022-02-16 14:04:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:43,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:43,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:43,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116909553] [2022-02-16 14:04:43,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116909553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:43,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132796385] [2022-02-16 14:04:43,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:04:43,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:43,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:43,396 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:43,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-16 14:04:43,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:04:43,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:43,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:43,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:43,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:43,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132796385] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:43,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:43,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-02-16 14:04:43,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167958638] [2022-02-16 14:04:43,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:43,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:04:43,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:04:43,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:04:43,898 INFO L87 Difference]: Start difference. First operand 2204 states and 3385 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:44,592 INFO L93 Difference]: Finished difference Result 2677 states and 4045 transitions. [2022-02-16 14:04:44,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 14:04:44,592 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:44,595 INFO L225 Difference]: With dead ends: 2677 [2022-02-16 14:04:44,595 INFO L226 Difference]: Without dead ends: 2663 [2022-02-16 14:04:44,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1076, Invalid=3616, Unknown=0, NotChecked=0, Total=4692 [2022-02-16 14:04:44,596 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:44,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 197 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2022-02-16 14:04:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2180. [2022-02-16 14:04:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 1.534189995410739) internal successors, (3343), 2179 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 3343 transitions. [2022-02-16 14:04:44,618 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 3343 transitions. Word has length 36 [2022-02-16 14:04:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:44,618 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 3343 transitions. [2022-02-16 14:04:44,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 3343 transitions. [2022-02-16 14:04:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:44,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:44,620 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:44,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:44,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-16 14:04:44,821 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash 878023485, now seen corresponding path program 63 times [2022-02-16 14:04:44,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:44,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669195987] [2022-02-16 14:04:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:44,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:44,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:44,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669195987] [2022-02-16 14:04:44,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669195987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:44,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032560514] [2022-02-16 14:04:44,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:04:44,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:44,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:44,929 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:44,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-16 14:04:44,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-16 14:04:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:44,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:44,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:45,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:45,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032560514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:45,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:45,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 35 [2022-02-16 14:04:45,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807716988] [2022-02-16 14:04:45,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:45,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:04:45,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:45,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:04:45,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:04:45,495 INFO L87 Difference]: Start difference. First operand 2180 states and 3343 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:47,956 INFO L93 Difference]: Finished difference Result 4446 states and 6589 transitions. [2022-02-16 14:04:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-16 14:04:47,956 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:47,961 INFO L225 Difference]: With dead ends: 4446 [2022-02-16 14:04:47,961 INFO L226 Difference]: Without dead ends: 4446 [2022-02-16 14:04:47,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10198 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6747, Invalid=16509, Unknown=0, NotChecked=0, Total=23256 [2022-02-16 14:04:47,962 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 476 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:47,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 168 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:04:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2022-02-16 14:04:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2650. [2022-02-16 14:04:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 2649 states have (on average 1.534541336353341) internal successors, (4065), 2649 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 4065 transitions. [2022-02-16 14:04:48,006 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 4065 transitions. Word has length 36 [2022-02-16 14:04:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:48,006 INFO L470 AbstractCegarLoop]: Abstraction has 2650 states and 4065 transitions. [2022-02-16 14:04:48,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 4065 transitions. [2022-02-16 14:04:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:48,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:48,009 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:48,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:48,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-16 14:04:48,227 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1788185533, now seen corresponding path program 64 times [2022-02-16 14:04:48,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:48,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506093697] [2022-02-16 14:04:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:48,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:48,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:48,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506093697] [2022-02-16 14:04:48,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506093697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:48,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793653450] [2022-02-16 14:04:48,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:48,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:48,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:48,321 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:48,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-16 14:04:48,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:48,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:48,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:48,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793653450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:48,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:48,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-02-16 14:04:48,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005651904] [2022-02-16 14:04:48,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:48,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:04:48,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:04:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:04:48,854 INFO L87 Difference]: Start difference. First operand 2650 states and 4065 transitions. Second operand has 35 states, 35 states have (on average 2.4) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:49,545 INFO L93 Difference]: Finished difference Result 2936 states and 4456 transitions. [2022-02-16 14:04:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 14:04:49,546 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:49,549 INFO L225 Difference]: With dead ends: 2936 [2022-02-16 14:04:49,549 INFO L226 Difference]: Without dead ends: 2927 [2022-02-16 14:04:49,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1082, Invalid=3474, Unknown=0, NotChecked=0, Total=4556 [2022-02-16 14:04:49,549 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 145 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:49,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 175 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-02-16 14:04:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2702. [2022-02-16 14:04:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 1.5327656423546834) internal successors, (4140), 2701 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 4140 transitions. [2022-02-16 14:04:49,577 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 4140 transitions. Word has length 36 [2022-02-16 14:04:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 2702 states and 4140 transitions. [2022-02-16 14:04:49,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 4140 transitions. [2022-02-16 14:04:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:04:49,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:49,579 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:49,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-16 14:04:49,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:49,780 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1550740473, now seen corresponding path program 65 times [2022-02-16 14:04:49,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:49,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902434379] [2022-02-16 14:04:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:49,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:49,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:49,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902434379] [2022-02-16 14:04:49,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902434379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:49,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624455012] [2022-02-16 14:04:49,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:49,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:49,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:49,900 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:49,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-16 14:04:49,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-16 14:04:49,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:49,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:50,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:50,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624455012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:50,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:50,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 35 [2022-02-16 14:04:50,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898562368] [2022-02-16 14:04:50,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:50,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:04:50,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:50,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:04:50,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:04:50,530 INFO L87 Difference]: Start difference. First operand 2702 states and 4140 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:53,187 INFO L93 Difference]: Finished difference Result 5773 states and 8687 transitions. [2022-02-16 14:04:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-16 14:04:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:04:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:53,193 INFO L225 Difference]: With dead ends: 5773 [2022-02-16 14:04:53,193 INFO L226 Difference]: Without dead ends: 5773 [2022-02-16 14:04:53,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12267 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7888, Invalid=19502, Unknown=0, NotChecked=0, Total=27390 [2022-02-16 14:04:53,195 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 410 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:53,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 134 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5773 states. [2022-02-16 14:04:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5773 to 4544. [2022-02-16 14:04:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 1.548976447281532) internal successors, (7037), 4543 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 7037 transitions. [2022-02-16 14:04:53,275 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 7037 transitions. Word has length 36 [2022-02-16 14:04:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:53,275 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 7037 transitions. [2022-02-16 14:04:53,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 7037 transitions. [2022-02-16 14:04:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-16 14:04:53,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:53,281 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:53,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-16 14:04:53,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-16 14:04:53,502 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:53,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1206640847, now seen corresponding path program 66 times [2022-02-16 14:04:53,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:53,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904055692] [2022-02-16 14:04:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:53,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:53,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:53,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904055692] [2022-02-16 14:04:53,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904055692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:53,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438326242] [2022-02-16 14:04:53,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:04:53,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:53,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:53,556 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:53,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-16 14:04:53,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-16 14:04:53,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:53,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:04:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:54,224 INFO L353 Elim1Store]: treesize reduction 660, result has 23.3 percent of original size [2022-02-16 14:04:54,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 181 treesize of output 272 [2022-02-16 14:04:54,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:54,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 321 treesize of output 208 [2022-02-16 14:04:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:54,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:55,023 INFO L353 Elim1Store]: treesize reduction 96, result has 43.2 percent of original size [2022-02-16 14:04:55,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 188 treesize of output 174 [2022-02-16 14:04:55,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:55,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 340 treesize of output 220 [2022-02-16 14:04:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:55,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438326242] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:55,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:55,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-02-16 14:04:55,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450850538] [2022-02-16 14:04:55,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:55,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:04:55,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:55,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:04:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:04:55,246 INFO L87 Difference]: Start difference. First operand 4544 states and 7037 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:55,736 INFO L93 Difference]: Finished difference Result 5660 states and 8722 transitions. [2022-02-16 14:04:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:04:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-16 14:04:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:55,743 INFO L225 Difference]: With dead ends: 5660 [2022-02-16 14:04:55,743 INFO L226 Difference]: Without dead ends: 5656 [2022-02-16 14:04:55,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:04:55,743 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 139 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:55,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1141 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:04:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2022-02-16 14:04:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 5412. [2022-02-16 14:04:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 1.5655146922934762) internal successors, (8471), 5411 states have internal predecessors, (8471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 8471 transitions. [2022-02-16 14:04:55,811 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 8471 transitions. Word has length 38 [2022-02-16 14:04:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:55,811 INFO L470 AbstractCegarLoop]: Abstraction has 5412 states and 8471 transitions. [2022-02-16 14:04:55,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 8471 transitions. [2022-02-16 14:04:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-16 14:04:55,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:55,816 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:55,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:56,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-16 14:04:56,017 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 967353911, now seen corresponding path program 67 times [2022-02-16 14:04:56,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:56,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754356821] [2022-02-16 14:04:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:56,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:56,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:56,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754356821] [2022-02-16 14:04:56,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754356821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:56,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897017641] [2022-02-16 14:04:56,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:04:56,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:56,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:56,073 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:56,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-16 14:04:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:56,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-16 14:04:56,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:56,593 INFO L353 Elim1Store]: treesize reduction 450, result has 28.7 percent of original size [2022-02-16 14:04:56,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 45 case distinctions, treesize of input 148 treesize of output 239 [2022-02-16 14:04:56,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:56,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 275 treesize of output 211 [2022-02-16 14:04:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:56,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:57,332 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-02-16 14:04:57,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 152 [2022-02-16 14:04:57,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:57,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 308 treesize of output 220 [2022-02-16 14:04:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:57,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897017641] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:57,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:57,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-02-16 14:04:57,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835306054] [2022-02-16 14:04:57,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:57,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 14:04:57,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 14:04:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:04:57,649 INFO L87 Difference]: Start difference. First operand 5412 states and 8471 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:58,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:58,084 INFO L93 Difference]: Finished difference Result 6481 states and 10075 transitions. [2022-02-16 14:04:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:04:58,085 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-16 14:04:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:58,093 INFO L225 Difference]: With dead ends: 6481 [2022-02-16 14:04:58,093 INFO L226 Difference]: Without dead ends: 6473 [2022-02-16 14:04:58,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:04:58,094 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 150 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:58,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1317 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:04:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2022-02-16 14:04:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 6130. [2022-02-16 14:04:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6130 states, 6129 states have (on average 1.577092511013216) internal successors, (9666), 6129 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 9666 transitions. [2022-02-16 14:04:58,176 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 9666 transitions. Word has length 38 [2022-02-16 14:04:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:58,176 INFO L470 AbstractCegarLoop]: Abstraction has 6130 states and 9666 transitions. [2022-02-16 14:04:58,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 9666 transitions. [2022-02-16 14:04:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-16 14:04:58,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:58,181 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:58,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-16 14:04:58,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-16 14:04:58,383 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:58,383 INFO L85 PathProgramCache]: Analyzing trace with hash 296496183, now seen corresponding path program 68 times [2022-02-16 14:04:58,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:58,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066975874] [2022-02-16 14:04:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:58,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:04:58,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:58,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066975874] [2022-02-16 14:04:58,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066975874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:58,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477713124] [2022-02-16 14:04:58,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:04:58,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:58,445 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:58,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-16 14:04:58,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:04:58,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:58,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-16 14:04:58,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:58,873 INFO L353 Elim1Store]: treesize reduction 293, result has 34.7 percent of original size [2022-02-16 14:04:58,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 158 treesize of output 208 [2022-02-16 14:04:59,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:04:59,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 239 treesize of output 211 [2022-02-16 14:04:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:04:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:00,039 INFO L353 Elim1Store]: treesize reduction 92, result has 45.6 percent of original size [2022-02-16 14:05:00,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 168 treesize of output 176 [2022-02-16 14:05:00,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:00,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-02-16 14:05:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:05:00,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477713124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:00,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:00,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 29 [2022-02-16 14:05:00,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792963579] [2022-02-16 14:05:00,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:00,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:05:00,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:05:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:05:00,278 INFO L87 Difference]: Start difference. First operand 6130 states and 9666 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:00,645 INFO L93 Difference]: Finished difference Result 6776 states and 10585 transitions. [2022-02-16 14:05:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 14:05:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-16 14:05:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:00,654 INFO L225 Difference]: With dead ends: 6776 [2022-02-16 14:05:00,654 INFO L226 Difference]: Without dead ends: 6766 [2022-02-16 14:05:00,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:05:00,654 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 159 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:00,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1146 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 829 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-02-16 14:05:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6766 states. [2022-02-16 14:05:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6766 to 6488. [2022-02-16 14:05:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6488 states, 6487 states have (on average 1.579929088947125) internal successors, (10249), 6487 states have internal predecessors, (10249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6488 states to 6488 states and 10249 transitions. [2022-02-16 14:05:00,742 INFO L78 Accepts]: Start accepts. Automaton has 6488 states and 10249 transitions. Word has length 38 [2022-02-16 14:05:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:00,742 INFO L470 AbstractCegarLoop]: Abstraction has 6488 states and 10249 transitions. [2022-02-16 14:05:00,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6488 states and 10249 transitions. [2022-02-16 14:05:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-16 14:05:00,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:00,747 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:00,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-16 14:05:00,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-02-16 14:05:00,948 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:00,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:00,948 INFO L85 PathProgramCache]: Analyzing trace with hash -152686025, now seen corresponding path program 69 times [2022-02-16 14:05:00,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:00,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912968215] [2022-02-16 14:05:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:00,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:05:00,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:00,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912968215] [2022-02-16 14:05:00,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912968215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:00,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075701320] [2022-02-16 14:05:00,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:05:00,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:00,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:00,998 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:05:00,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-16 14:05:01,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-16 14:05:01,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:05:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:01,529 INFO L353 Elim1Store]: treesize reduction 268, result has 30.4 percent of original size [2022-02-16 14:05:01,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 217 treesize of output 187 [2022-02-16 14:05:01,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:01,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 201 treesize of output 211 [2022-02-16 14:05:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:05:01,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:02,057 INFO L353 Elim1Store]: treesize reduction 144, result has 36.0 percent of original size [2022-02-16 14:05:02,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 172 treesize of output 196 [2022-02-16 14:05:02,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:02,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-02-16 14:05:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:05:02,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075701320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:02,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:02,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-02-16 14:05:02,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196281285] [2022-02-16 14:05:02,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:02,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:05:02,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:05:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:05:02,349 INFO L87 Difference]: Start difference. First operand 6488 states and 10249 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:02,692 INFO L93 Difference]: Finished difference Result 6974 states and 10956 transitions. [2022-02-16 14:05:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:05:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-16 14:05:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:02,702 INFO L225 Difference]: With dead ends: 6974 [2022-02-16 14:05:02,702 INFO L226 Difference]: Without dead ends: 6968 [2022-02-16 14:05:02,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:05:02,702 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 181 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:02,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 959 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:05:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6968 states. [2022-02-16 14:05:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6968 to 6754. [2022-02-16 14:05:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6754 states, 6753 states have (on average 1.5828520657485563) internal successors, (10689), 6753 states have internal predecessors, (10689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6754 states to 6754 states and 10689 transitions. [2022-02-16 14:05:02,796 INFO L78 Accepts]: Start accepts. Automaton has 6754 states and 10689 transitions. Word has length 38 [2022-02-16 14:05:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:02,797 INFO L470 AbstractCegarLoop]: Abstraction has 6754 states and 10689 transitions. [2022-02-16 14:05:02,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 6754 states and 10689 transitions. [2022-02-16 14:05:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-16 14:05:02,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:02,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:02,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-16 14:05:03,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:03,002 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:03,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:03,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1974908983, now seen corresponding path program 70 times [2022-02-16 14:05:03,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:03,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269321808] [2022-02-16 14:05:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:03,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:05:03,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:03,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269321808] [2022-02-16 14:05:03,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269321808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:03,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150942988] [2022-02-16 14:05:03,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:05:03,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:03,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:03,059 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:05:03,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-16 14:05:03,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:05:03,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-16 14:05:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:03,369 INFO L353 Elim1Store]: treesize reduction 107, result has 47.8 percent of original size [2022-02-16 14:05:03,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 154 treesize of output 144 [2022-02-16 14:05:16,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:16,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 231 treesize of output 211 [2022-02-16 14:05:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:05:16,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:16,548 INFO L353 Elim1Store]: treesize reduction 204, result has 29.4 percent of original size [2022-02-16 14:05:16,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 168 treesize of output 212 [2022-02-16 14:05:16,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:16,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-02-16 14:05:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:05:16,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150942988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:16,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:16,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 27 [2022-02-16 14:05:16,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374015558] [2022-02-16 14:05:16,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:16,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:05:16,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:16,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:05:16,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:05:16,844 INFO L87 Difference]: Start difference. First operand 6754 states and 10689 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:17,132 INFO L93 Difference]: Finished difference Result 7216 states and 11333 transitions. [2022-02-16 14:05:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:05:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-16 14:05:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:17,141 INFO L225 Difference]: With dead ends: 7216 [2022-02-16 14:05:17,141 INFO L226 Difference]: Without dead ends: 7206 [2022-02-16 14:05:17,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:05:17,142 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 241 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:17,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1184 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 654 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2022-02-16 14:05:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7206 states. [2022-02-16 14:05:17,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7206 to 6941. [2022-02-16 14:05:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6941 states, 6940 states have (on average 1.584870317002882) internal successors, (10999), 6940 states have internal predecessors, (10999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 10999 transitions. [2022-02-16 14:05:17,237 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 10999 transitions. Word has length 38 [2022-02-16 14:05:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:17,237 INFO L470 AbstractCegarLoop]: Abstraction has 6941 states and 10999 transitions. [2022-02-16 14:05:17,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 10999 transitions. [2022-02-16 14:05:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-16 14:05:17,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:17,242 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:17,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-16 14:05:17,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:17,443 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2105688521, now seen corresponding path program 71 times [2022-02-16 14:05:17,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:17,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956243203] [2022-02-16 14:05:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:17,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:05:17,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:17,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956243203] [2022-02-16 14:05:17,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956243203] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:17,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38790908] [2022-02-16 14:05:17,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:05:17,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:17,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:17,501 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:05:17,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-16 14:05:17,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-02-16 14:05:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-16 14:05:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:17,757 INFO L353 Elim1Store]: treesize reduction 48, result has 63.4 percent of original size [2022-02-16 14:05:17,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 129 [2022-02-16 14:05:44,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:44,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 297 treesize of output 211 [2022-02-16 14:05:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:05:44,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:45,117 INFO L353 Elim1Store]: treesize reduction 272, result has 24.7 percent of original size [2022-02-16 14:05:45,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 156 treesize of output 224 [2022-02-16 14:05:45,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:45,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 326 treesize of output 220 [2022-02-16 14:05:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:05:45,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38790908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:45,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:45,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 26 [2022-02-16 14:05:45,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961769954] [2022-02-16 14:05:45,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:45,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:05:45,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:05:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:05:45,436 INFO L87 Difference]: Start difference. First operand 6941 states and 10999 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:45,723 INFO L93 Difference]: Finished difference Result 7329 states and 11527 transitions. [2022-02-16 14:05:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:05:45,723 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-16 14:05:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:45,732 INFO L225 Difference]: With dead ends: 7329 [2022-02-16 14:05:45,732 INFO L226 Difference]: Without dead ends: 7319 [2022-02-16 14:05:45,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:05:45,732 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 187 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:45,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1068 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 613 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-02-16 14:05:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2022-02-16 14:05:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 6841. [2022-02-16 14:05:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6841 states, 6840 states have (on average 1.588450292397661) internal successors, (10865), 6840 states have internal predecessors, (10865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6841 states to 6841 states and 10865 transitions. [2022-02-16 14:05:45,827 INFO L78 Accepts]: Start accepts. Automaton has 6841 states and 10865 transitions. Word has length 38 [2022-02-16 14:05:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:45,827 INFO L470 AbstractCegarLoop]: Abstraction has 6841 states and 10865 transitions. [2022-02-16 14:05:45,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 6841 states and 10865 transitions. [2022-02-16 14:05:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-16 14:05:45,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:45,831 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:45,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-16 14:05:46,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:46,032 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2040218679, now seen corresponding path program 72 times [2022-02-16 14:05:46,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:46,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562709237] [2022-02-16 14:05:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:46,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:05:46,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:46,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562709237] [2022-02-16 14:05:46,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562709237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:46,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739535450] [2022-02-16 14:05:46,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:05:46,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:46,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:46,087 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:05:46,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-16 14:05:46,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-16 14:05:46,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:46,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:05:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:46,722 INFO L353 Elim1Store]: treesize reduction 678, result has 21.3 percent of original size [2022-02-16 14:05:46,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 181 treesize of output 254 [2022-02-16 14:05:46,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:46,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 321 treesize of output 208 [2022-02-16 14:05:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:05:46,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:47,454 INFO L353 Elim1Store]: treesize reduction 96, result has 43.2 percent of original size [2022-02-16 14:05:47,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 188 treesize of output 174 [2022-02-16 14:05:47,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:05:47,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-02-16 14:05:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:05:47,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739535450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:47,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:47,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-02-16 14:05:47,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023452597] [2022-02-16 14:05:47,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:47,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:05:47,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:05:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:05:47,799 INFO L87 Difference]: Start difference. First operand 6841 states and 10865 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:48,162 INFO L93 Difference]: Finished difference Result 7400 states and 11658 transitions. [2022-02-16 14:05:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:05:48,162 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-16 14:05:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:48,171 INFO L225 Difference]: With dead ends: 7400 [2022-02-16 14:05:48,171 INFO L226 Difference]: Without dead ends: 7396 [2022-02-16 14:05:48,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:05:48,171 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 157 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:48,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1136 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:05:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2022-02-16 14:05:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 7247. [2022-02-16 14:05:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7247 states, 7246 states have (on average 1.5863924924096053) internal successors, (11495), 7246 states have internal predecessors, (11495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7247 states to 7247 states and 11495 transitions. [2022-02-16 14:05:48,270 INFO L78 Accepts]: Start accepts. Automaton has 7247 states and 11495 transitions. Word has length 38 [2022-02-16 14:05:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:48,270 INFO L470 AbstractCegarLoop]: Abstraction has 7247 states and 11495 transitions. [2022-02-16 14:05:48,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7247 states and 11495 transitions. [2022-02-16 14:05:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:05:48,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:48,276 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:48,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-16 14:05:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-16 14:05:48,476 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1603098031, now seen corresponding path program 73 times [2022-02-16 14:05:48,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:48,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340790317] [2022-02-16 14:05:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:48,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:48,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:48,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340790317] [2022-02-16 14:05:48,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340790317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:48,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112067793] [2022-02-16 14:05:48,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:05:48,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:48,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:48,649 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:05:48,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-16 14:05:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:05:48,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:49,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:49,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112067793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:49,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:49,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-02-16 14:05:49,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682983227] [2022-02-16 14:05:49,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:49,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-16 14:05:49,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-16 14:05:49,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:05:49,275 INFO L87 Difference]: Start difference. First operand 7247 states and 11495 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:51,627 INFO L93 Difference]: Finished difference Result 8917 states and 13854 transitions. [2022-02-16 14:05:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-16 14:05:51,627 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:05:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:51,639 INFO L225 Difference]: With dead ends: 8917 [2022-02-16 14:05:51,639 INFO L226 Difference]: Without dead ends: 8917 [2022-02-16 14:05:51,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6376 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4990, Invalid=14750, Unknown=0, NotChecked=0, Total=19740 [2022-02-16 14:05:51,641 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 277 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:51,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 196 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:05:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8917 states. [2022-02-16 14:05:51,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8917 to 6495. [2022-02-16 14:05:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6495 states, 6494 states have (on average 1.5753002771789344) internal successors, (10230), 6494 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6495 states to 6495 states and 10230 transitions. [2022-02-16 14:05:51,736 INFO L78 Accepts]: Start accepts. Automaton has 6495 states and 10230 transitions. Word has length 40 [2022-02-16 14:05:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:51,736 INFO L470 AbstractCegarLoop]: Abstraction has 6495 states and 10230 transitions. [2022-02-16 14:05:51,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 6495 states and 10230 transitions. [2022-02-16 14:05:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:05:51,740 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:51,740 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:51,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-16 14:05:51,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:51,941 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:51,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1400242897, now seen corresponding path program 74 times [2022-02-16 14:05:51,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:51,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559374378] [2022-02-16 14:05:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:51,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:52,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:52,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559374378] [2022-02-16 14:05:52,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559374378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:52,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55814454] [2022-02-16 14:05:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:05:52,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:52,097 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:05:52,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-16 14:05:52,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:05:52,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:05:52,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:52,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:52,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55814454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:52,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:52,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-02-16 14:05:52,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950856585] [2022-02-16 14:05:52,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:52,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-16 14:05:52,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-16 14:05:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:05:52,670 INFO L87 Difference]: Start difference. First operand 6495 states and 10230 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:54,341 INFO L93 Difference]: Finished difference Result 9134 states and 13991 transitions. [2022-02-16 14:05:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-16 14:05:54,342 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:05:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:54,353 INFO L225 Difference]: With dead ends: 9134 [2022-02-16 14:05:54,353 INFO L226 Difference]: Without dead ends: 9101 [2022-02-16 14:05:54,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2768, Invalid=9888, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 14:05:54,355 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 694 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:54,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 222 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:05:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2022-02-16 14:05:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 6592. [2022-02-16 14:05:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6592 states, 6591 states have (on average 1.5624336216052193) internal successors, (10298), 6591 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6592 states to 6592 states and 10298 transitions. [2022-02-16 14:05:54,454 INFO L78 Accepts]: Start accepts. Automaton has 6592 states and 10298 transitions. Word has length 40 [2022-02-16 14:05:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:54,454 INFO L470 AbstractCegarLoop]: Abstraction has 6592 states and 10298 transitions. [2022-02-16 14:05:54,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6592 states and 10298 transitions. [2022-02-16 14:05:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:05:54,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:54,459 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:54,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-16 14:05:54,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:54,660 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash -921235911, now seen corresponding path program 75 times [2022-02-16 14:05:54,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:54,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218033963] [2022-02-16 14:05:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:54,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 53 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:05:54,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:54,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218033963] [2022-02-16 14:05:54,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218033963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:54,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843643118] [2022-02-16 14:05:54,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:05:54,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:54,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:54,786 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:05:54,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-16 14:05:54,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-16 14:05:54,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:54,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:05:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:55,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:55,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843643118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:55,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:55,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-02-16 14:05:55,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715737023] [2022-02-16 14:05:55,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:55,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-16 14:05:55,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-16 14:05:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1203, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:05:55,504 INFO L87 Difference]: Start difference. First operand 6592 states and 10298 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:57,275 INFO L93 Difference]: Finished difference Result 10137 states and 15734 transitions. [2022-02-16 14:05:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-16 14:05:57,276 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:05:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:57,289 INFO L225 Difference]: With dead ends: 10137 [2022-02-16 14:05:57,290 INFO L226 Difference]: Without dead ends: 10121 [2022-02-16 14:05:57,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4389 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3557, Invalid=10249, Unknown=0, NotChecked=0, Total=13806 [2022-02-16 14:05:57,291 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 310 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:57,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 145 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:05:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10121 states. [2022-02-16 14:05:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10121 to 8489. [2022-02-16 14:05:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8489 states, 8488 states have (on average 1.5756361922714421) internal successors, (13374), 8488 states have internal predecessors, (13374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8489 states to 8489 states and 13374 transitions. [2022-02-16 14:05:57,419 INFO L78 Accepts]: Start accepts. Automaton has 8489 states and 13374 transitions. Word has length 40 [2022-02-16 14:05:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:57,419 INFO L470 AbstractCegarLoop]: Abstraction has 8489 states and 13374 transitions. [2022-02-16 14:05:57,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 8489 states and 13374 transitions. [2022-02-16 14:05:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:05:57,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:57,424 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:57,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-16 14:05:57,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-16 14:05:57,625 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1303708149, now seen corresponding path program 76 times [2022-02-16 14:05:57,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:57,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596945340] [2022-02-16 14:05:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:57,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:57,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:57,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596945340] [2022-02-16 14:05:57,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596945340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:57,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904278230] [2022-02-16 14:05:57,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:05:57,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:57,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:57,747 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:05:57,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-16 14:05:57,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:05:57,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:05:57,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:58,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:58,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904278230] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:58,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:58,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 41 [2022-02-16 14:05:58,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46784043] [2022-02-16 14:05:58,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:58,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-16 14:05:58,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-16 14:05:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1378, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 14:05:58,495 INFO L87 Difference]: Start difference. First operand 8489 states and 13374 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:01,257 INFO L93 Difference]: Finished difference Result 10257 states and 15817 transitions. [2022-02-16 14:06:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-16 14:06:01,258 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:01,270 INFO L225 Difference]: With dead ends: 10257 [2022-02-16 14:06:01,271 INFO L226 Difference]: Without dead ends: 10257 [2022-02-16 14:06:01,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8987 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7059, Invalid=18381, Unknown=0, NotChecked=0, Total=25440 [2022-02-16 14:06:01,273 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 303 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:01,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 208 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:06:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10257 states. [2022-02-16 14:06:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10257 to 7480. [2022-02-16 14:06:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 7479 states have (on average 1.5610375718678968) internal successors, (11675), 7479 states have internal predecessors, (11675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 11675 transitions. [2022-02-16 14:06:01,388 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 11675 transitions. Word has length 40 [2022-02-16 14:06:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:01,389 INFO L470 AbstractCegarLoop]: Abstraction has 7480 states and 11675 transitions. [2022-02-16 14:06:01,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 11675 transitions. [2022-02-16 14:06:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:01,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:01,394 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:01,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-16 14:06:01,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-16 14:06:01,612 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:01,612 INFO L85 PathProgramCache]: Analyzing trace with hash -666621683, now seen corresponding path program 77 times [2022-02-16 14:06:01,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:01,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153723550] [2022-02-16 14:06:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:01,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:01,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:01,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153723550] [2022-02-16 14:06:01,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153723550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:01,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307498197] [2022-02-16 14:06:01,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:01,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:01,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:01,756 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:01,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-16 14:06:01,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-16 14:06:01,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:02,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:02,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307498197] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:02,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:02,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-02-16 14:06:02,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332204891] [2022-02-16 14:06:02,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:02,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-16 14:06:02,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-16 14:06:02,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:06:02,387 INFO L87 Difference]: Start difference. First operand 7480 states and 11675 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:04,734 INFO L93 Difference]: Finished difference Result 9831 states and 14914 transitions. [2022-02-16 14:06:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-16 14:06:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:04,747 INFO L225 Difference]: With dead ends: 9831 [2022-02-16 14:06:04,747 INFO L226 Difference]: Without dead ends: 9831 [2022-02-16 14:06:04,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6421 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4886, Invalid=14854, Unknown=0, NotChecked=0, Total=19740 [2022-02-16 14:06:04,749 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 333 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:04,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 166 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:06:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9831 states. [2022-02-16 14:06:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9831 to 6747. [2022-02-16 14:06:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6747 states, 6746 states have (on average 1.5582567447376223) internal successors, (10512), 6746 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6747 states to 6747 states and 10512 transitions. [2022-02-16 14:06:04,888 INFO L78 Accepts]: Start accepts. Automaton has 6747 states and 10512 transitions. Word has length 40 [2022-02-16 14:06:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:04,888 INFO L470 AbstractCegarLoop]: Abstraction has 6747 states and 10512 transitions. [2022-02-16 14:06:04,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6747 states and 10512 transitions. [2022-02-16 14:06:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:04,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:04,893 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:04,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-16 14:06:05,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:05,093 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash -851205747, now seen corresponding path program 78 times [2022-02-16 14:06:05,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:05,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542774462] [2022-02-16 14:06:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:05,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:05,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:05,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542774462] [2022-02-16 14:06:05,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542774462] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:05,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981770767] [2022-02-16 14:06:05,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:05,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:05,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:05,252 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:05,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-16 14:06:05,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-16 14:06:05,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:05,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:05,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:05,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981770767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:05,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:05,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-02-16 14:06:05,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841807081] [2022-02-16 14:06:05,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:05,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-16 14:06:05,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-16 14:06:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:06:05,861 INFO L87 Difference]: Start difference. First operand 6747 states and 10512 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:06,967 INFO L93 Difference]: Finished difference Result 8173 states and 12447 transitions. [2022-02-16 14:06:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 14:06:06,967 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:06,978 INFO L225 Difference]: With dead ends: 8173 [2022-02-16 14:06:06,978 INFO L226 Difference]: Without dead ends: 8145 [2022-02-16 14:06:06,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1708, Invalid=6124, Unknown=0, NotChecked=0, Total=7832 [2022-02-16 14:06:06,979 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:06,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 280 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:06,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2022-02-16 14:06:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 6437. [2022-02-16 14:06:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6437 states, 6436 states have (on average 1.550341827221877) internal successors, (9978), 6436 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6437 states to 6437 states and 9978 transitions. [2022-02-16 14:06:07,070 INFO L78 Accepts]: Start accepts. Automaton has 6437 states and 9978 transitions. Word has length 40 [2022-02-16 14:06:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:07,070 INFO L470 AbstractCegarLoop]: Abstraction has 6437 states and 9978 transitions. [2022-02-16 14:06:07,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6437 states and 9978 transitions. [2022-02-16 14:06:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:07,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:07,076 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:07,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:07,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:07,300 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:07,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1050552009, now seen corresponding path program 79 times [2022-02-16 14:06:07,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:07,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024629285] [2022-02-16 14:06:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:07,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:07,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:07,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024629285] [2022-02-16 14:06:07,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024629285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:07,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930349221] [2022-02-16 14:06:07,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:07,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:07,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:07,437 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:07,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-16 14:06:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:07,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:08,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930349221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:08,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:08,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 40 [2022-02-16 14:06:08,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054984808] [2022-02-16 14:06:08,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-16 14:06:08,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-16 14:06:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:06:08,057 INFO L87 Difference]: Start difference. First operand 6437 states and 9978 transitions. Second operand has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:10,588 INFO L93 Difference]: Finished difference Result 9428 states and 14208 transitions. [2022-02-16 14:06:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-16 14:06:10,588 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:10,600 INFO L225 Difference]: With dead ends: 9428 [2022-02-16 14:06:10,600 INFO L226 Difference]: Without dead ends: 9428 [2022-02-16 14:06:10,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8065 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5740, Invalid=16610, Unknown=0, NotChecked=0, Total=22350 [2022-02-16 14:06:10,603 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 343 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:10,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 235 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:06:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9428 states. [2022-02-16 14:06:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9428 to 5814. [2022-02-16 14:06:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5814 states, 5813 states have (on average 1.5501462239807329) internal successors, (9011), 5813 states have internal predecessors, (9011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5814 states to 5814 states and 9011 transitions. [2022-02-16 14:06:10,692 INFO L78 Accepts]: Start accepts. Automaton has 5814 states and 9011 transitions. Word has length 40 [2022-02-16 14:06:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:10,692 INFO L470 AbstractCegarLoop]: Abstraction has 5814 states and 9011 transitions. [2022-02-16 14:06:10,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5814 states and 9011 transitions. [2022-02-16 14:06:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:10,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:10,696 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:10,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-02-16 14:06:10,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-02-16 14:06:10,897 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 102874953, now seen corresponding path program 80 times [2022-02-16 14:06:10,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:10,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411305732] [2022-02-16 14:06:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:10,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:11,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:11,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411305732] [2022-02-16 14:06:11,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411305732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:11,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804947902] [2022-02-16 14:06:11,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:11,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:11,043 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:11,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-16 14:06:11,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:11,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:11,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:11,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:11,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804947902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:11,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:11,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-02-16 14:06:11,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930448665] [2022-02-16 14:06:11,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:11,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-16 14:06:11,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-16 14:06:11,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:06:11,639 INFO L87 Difference]: Start difference. First operand 5814 states and 9011 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:12,640 INFO L93 Difference]: Finished difference Result 7113 states and 10825 transitions. [2022-02-16 14:06:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-16 14:06:12,641 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:12,650 INFO L225 Difference]: With dead ends: 7113 [2022-02-16 14:06:12,650 INFO L226 Difference]: Without dead ends: 7089 [2022-02-16 14:06:12,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1640, Invalid=5842, Unknown=0, NotChecked=0, Total=7482 [2022-02-16 14:06:12,651 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 286 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:12,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 201 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2022-02-16 14:06:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 5772. [2022-02-16 14:06:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5772 states, 5771 states have (on average 1.5447929301680818) internal successors, (8915), 5771 states have internal predecessors, (8915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5772 states to 5772 states and 8915 transitions. [2022-02-16 14:06:12,725 INFO L78 Accepts]: Start accepts. Automaton has 5772 states and 8915 transitions. Word has length 40 [2022-02-16 14:06:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:12,725 INFO L470 AbstractCegarLoop]: Abstraction has 5772 states and 8915 transitions. [2022-02-16 14:06:12,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5772 states and 8915 transitions. [2022-02-16 14:06:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:12,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:12,730 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:12,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-16 14:06:12,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:12,931 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:12,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1986763899, now seen corresponding path program 81 times [2022-02-16 14:06:12,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:12,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189021468] [2022-02-16 14:06:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:12,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:13,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:13,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189021468] [2022-02-16 14:06:13,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189021468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:13,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531813325] [2022-02-16 14:06:13,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:13,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:13,082 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:13,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-16 14:06:13,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-16 14:06:13,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:13,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:13,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531813325] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:13,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:13,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-02-16 14:06:13,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591555212] [2022-02-16 14:06:13,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:13,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-16 14:06:13,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-16 14:06:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:06:13,721 INFO L87 Difference]: Start difference. First operand 5772 states and 8915 transitions. Second operand has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:16,619 INFO L93 Difference]: Finished difference Result 9041 states and 13563 transitions. [2022-02-16 14:06:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-16 14:06:16,619 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:16,630 INFO L225 Difference]: With dead ends: 9041 [2022-02-16 14:06:16,630 INFO L226 Difference]: Without dead ends: 9041 [2022-02-16 14:06:16,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10729 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7276, Invalid=19456, Unknown=0, NotChecked=0, Total=26732 [2022-02-16 14:06:16,634 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 430 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:16,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 203 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:06:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9041 states. [2022-02-16 14:06:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9041 to 5171. [2022-02-16 14:06:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5170 states have (on average 1.5427466150870406) internal successors, (7976), 5170 states have internal predecessors, (7976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 7976 transitions. [2022-02-16 14:06:16,715 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 7976 transitions. Word has length 40 [2022-02-16 14:06:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:16,715 INFO L470 AbstractCegarLoop]: Abstraction has 5171 states and 7976 transitions. [2022-02-16 14:06:16,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 7976 transitions. [2022-02-16 14:06:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:16,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:16,719 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:16,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-16 14:06:16,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:16,919 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash 908336133, now seen corresponding path program 82 times [2022-02-16 14:06:16,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:16,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112246659] [2022-02-16 14:06:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:16,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:17,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:17,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112246659] [2022-02-16 14:06:17,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112246659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:17,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450981388] [2022-02-16 14:06:17,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:17,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:17,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:17,056 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:17,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-16 14:06:17,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:17,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:17,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:17,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450981388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:17,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:17,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-02-16 14:06:17,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615053322] [2022-02-16 14:06:17,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:17,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-16 14:06:17,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-16 14:06:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:06:17,724 INFO L87 Difference]: Start difference. First operand 5171 states and 7976 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:18,692 INFO L93 Difference]: Finished difference Result 6125 states and 9326 transitions. [2022-02-16 14:06:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 14:06:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:18,708 INFO L225 Difference]: With dead ends: 6125 [2022-02-16 14:06:18,708 INFO L226 Difference]: Without dead ends: 6106 [2022-02-16 14:06:18,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1590, Invalid=5550, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:06:18,710 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 210 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:18,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 261 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2022-02-16 14:06:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 5219. [2022-02-16 14:06:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5219 states, 5218 states have (on average 1.5410118819471061) internal successors, (8041), 5218 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5219 states to 5219 states and 8041 transitions. [2022-02-16 14:06:18,773 INFO L78 Accepts]: Start accepts. Automaton has 5219 states and 8041 transitions. Word has length 40 [2022-02-16 14:06:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:18,773 INFO L470 AbstractCegarLoop]: Abstraction has 5219 states and 8041 transitions. [2022-02-16 14:06:18,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 5219 states and 8041 transitions. [2022-02-16 14:06:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:18,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:18,778 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:18,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-16 14:06:18,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-02-16 14:06:18,978 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1630183233, now seen corresponding path program 83 times [2022-02-16 14:06:18,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:18,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309853191] [2022-02-16 14:06:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:18,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:19,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:19,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309853191] [2022-02-16 14:06:19,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309853191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:19,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273574852] [2022-02-16 14:06:19,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:19,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:19,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:19,109 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:19,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-16 14:06:19,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-16 14:06:19,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:19,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:19,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273574852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:19,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:19,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 40 [2022-02-16 14:06:19,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896529720] [2022-02-16 14:06:19,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:19,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-16 14:06:19,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-16 14:06:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:06:19,768 INFO L87 Difference]: Start difference. First operand 5219 states and 8041 transitions. Second operand has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:23,092 INFO L93 Difference]: Finished difference Result 8804 states and 13178 transitions. [2022-02-16 14:06:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-16 14:06:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:23,103 INFO L225 Difference]: With dead ends: 8804 [2022-02-16 14:06:23,104 INFO L226 Difference]: Without dead ends: 8804 [2022-02-16 14:06:23,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14692 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9498, Invalid=23808, Unknown=0, NotChecked=0, Total=33306 [2022-02-16 14:06:23,107 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 514 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:23,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 213 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:06:23,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8804 states. [2022-02-16 14:06:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8804 to 4700. [2022-02-16 14:06:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4700 states, 4699 states have (on average 1.536497127048308) internal successors, (7220), 4699 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4700 states to 4700 states and 7220 transitions. [2022-02-16 14:06:23,183 INFO L78 Accepts]: Start accepts. Automaton has 4700 states and 7220 transitions. Word has length 40 [2022-02-16 14:06:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:23,183 INFO L470 AbstractCegarLoop]: Abstraction has 4700 states and 7220 transitions. [2022-02-16 14:06:23,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4700 states and 7220 transitions. [2022-02-16 14:06:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:23,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:23,188 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:23,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-16 14:06:23,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:23,388 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:23,388 INFO L85 PathProgramCache]: Analyzing trace with hash 122582977, now seen corresponding path program 84 times [2022-02-16 14:06:23,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:23,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563533676] [2022-02-16 14:06:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:23,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:23,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:23,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563533676] [2022-02-16 14:06:23,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563533676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:23,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65339404] [2022-02-16 14:06:23,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:23,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:23,512 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:23,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-16 14:06:23,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-16 14:06:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:23,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:23,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:24,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65339404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:24,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:24,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-02-16 14:06:24,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702395964] [2022-02-16 14:06:24,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:24,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-16 14:06:24,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-16 14:06:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:06:24,165 INFO L87 Difference]: Start difference. First operand 4700 states and 7220 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:25,111 INFO L93 Difference]: Finished difference Result 5358 states and 8150 transitions. [2022-02-16 14:06:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:06:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:25,117 INFO L225 Difference]: With dead ends: 5358 [2022-02-16 14:06:25,117 INFO L226 Difference]: Without dead ends: 5344 [2022-02-16 14:06:25,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1557, Invalid=5249, Unknown=0, NotChecked=0, Total=6806 [2022-02-16 14:06:25,118 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 174 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:25,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 285 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2022-02-16 14:06:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 4701. [2022-02-16 14:06:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 4700 states have (on average 1.5351063829787235) internal successors, (7215), 4700 states have internal predecessors, (7215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 7215 transitions. [2022-02-16 14:06:25,171 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 7215 transitions. Word has length 40 [2022-02-16 14:06:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:25,171 INFO L470 AbstractCegarLoop]: Abstraction has 4701 states and 7215 transitions. [2022-02-16 14:06:25,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 7215 transitions. [2022-02-16 14:06:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:25,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:25,175 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:25,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-16 14:06:25,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:25,378 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 458529277, now seen corresponding path program 85 times [2022-02-16 14:06:25,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:25,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473668267] [2022-02-16 14:06:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:25,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:25,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:25,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473668267] [2022-02-16 14:06:25,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473668267] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:25,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189923150] [2022-02-16 14:06:25,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:25,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:25,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:25,499 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:25,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-16 14:06:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:25,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:26,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189923150] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:26,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:26,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 40 [2022-02-16 14:06:26,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537219430] [2022-02-16 14:06:26,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:26,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-16 14:06:26,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-16 14:06:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:06:26,180 INFO L87 Difference]: Start difference. First operand 4701 states and 7215 transitions. Second operand has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:29,933 INFO L93 Difference]: Finished difference Result 9502 states and 14226 transitions. [2022-02-16 14:06:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-02-16 14:06:29,933 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:29,945 INFO L225 Difference]: With dead ends: 9502 [2022-02-16 14:06:29,945 INFO L226 Difference]: Without dead ends: 9502 [2022-02-16 14:06:29,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18772 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=11657, Invalid=28543, Unknown=0, NotChecked=0, Total=40200 [2022-02-16 14:06:29,949 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 609 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:29,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 225 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:06:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9502 states. [2022-02-16 14:06:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9502 to 6092. [2022-02-16 14:06:30,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6092 states, 6091 states have (on average 1.5353800689541948) internal successors, (9352), 6091 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6092 states to 6092 states and 9352 transitions. [2022-02-16 14:06:30,039 INFO L78 Accepts]: Start accepts. Automaton has 6092 states and 9352 transitions. Word has length 40 [2022-02-16 14:06:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:30,040 INFO L470 AbstractCegarLoop]: Abstraction has 6092 states and 9352 transitions. [2022-02-16 14:06:30,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6092 states and 9352 transitions. [2022-02-16 14:06:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:30,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:30,044 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:30,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-16 14:06:30,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-16 14:06:30,244 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:30,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1368691325, now seen corresponding path program 86 times [2022-02-16 14:06:30,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:30,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938253035] [2022-02-16 14:06:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:30,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:30,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:30,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938253035] [2022-02-16 14:06:30,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938253035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:30,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740451844] [2022-02-16 14:06:30,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:30,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:30,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:30,352 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:30,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-16 14:06:30,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:30,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:30,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:30,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:31,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740451844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:31,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:31,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-02-16 14:06:31,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27855301] [2022-02-16 14:06:31,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:31,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-16 14:06:31,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:31,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-16 14:06:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:06:31,019 INFO L87 Difference]: Start difference. First operand 6092 states and 9352 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:32,003 INFO L93 Difference]: Finished difference Result 6479 states and 9885 transitions. [2022-02-16 14:06:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 14:06:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:32,011 INFO L225 Difference]: With dead ends: 6479 [2022-02-16 14:06:32,012 INFO L226 Difference]: Without dead ends: 6470 [2022-02-16 14:06:32,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1569, Invalid=5073, Unknown=0, NotChecked=0, Total=6642 [2022-02-16 14:06:32,013 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 181 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:32,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 315 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6470 states. [2022-02-16 14:06:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6470 to 6174. [2022-02-16 14:06:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6174 states, 6173 states have (on average 1.5342621091851611) internal successors, (9471), 6173 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6174 states to 6174 states and 9471 transitions. [2022-02-16 14:06:32,085 INFO L78 Accepts]: Start accepts. Automaton has 6174 states and 9471 transitions. Word has length 40 [2022-02-16 14:06:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:32,086 INFO L470 AbstractCegarLoop]: Abstraction has 6174 states and 9471 transitions. [2022-02-16 14:06:32,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6174 states and 9471 transitions. [2022-02-16 14:06:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:06:32,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:32,090 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:32,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:32,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:32,290 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:32,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2012615609, now seen corresponding path program 87 times [2022-02-16 14:06:32,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:32,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090062087] [2022-02-16 14:06:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:32,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:32,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:32,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090062087] [2022-02-16 14:06:32,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090062087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:32,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395508643] [2022-02-16 14:06:32,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:32,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:32,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:32,418 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:32,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-16 14:06:32,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-16 14:06:32,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:32,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:33,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395508643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:33,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:33,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 40 [2022-02-16 14:06:33,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639556413] [2022-02-16 14:06:33,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:33,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-16 14:06:33,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:33,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-16 14:06:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:06:33,137 INFO L87 Difference]: Start difference. First operand 6174 states and 9471 transitions. Second operand has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:37,033 INFO L93 Difference]: Finished difference Result 12783 states and 19378 transitions. [2022-02-16 14:06:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-02-16 14:06:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:06:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:37,050 INFO L225 Difference]: With dead ends: 12783 [2022-02-16 14:06:37,050 INFO L226 Difference]: Without dead ends: 12783 [2022-02-16 14:06:37,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21482 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=12971, Invalid=32611, Unknown=0, NotChecked=0, Total=45582 [2022-02-16 14:06:37,056 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 459 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:37,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 189 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:06:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12783 states. [2022-02-16 14:06:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12783 to 10523. [2022-02-16 14:06:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10523 states, 10522 states have (on average 1.5469492491921688) internal successors, (16277), 10522 states have internal predecessors, (16277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10523 states to 10523 states and 16277 transitions. [2022-02-16 14:06:37,236 INFO L78 Accepts]: Start accepts. Automaton has 10523 states and 16277 transitions. Word has length 40 [2022-02-16 14:06:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:37,236 INFO L470 AbstractCegarLoop]: Abstraction has 10523 states and 16277 transitions. [2022-02-16 14:06:37,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10523 states and 16277 transitions. [2022-02-16 14:06:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-16 14:06:37,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:37,242 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:37,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-16 14:06:37,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:37,442 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:37,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1519356973, now seen corresponding path program 88 times [2022-02-16 14:06:37,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:37,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053204147] [2022-02-16 14:06:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:37,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:37,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:37,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053204147] [2022-02-16 14:06:37,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053204147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:37,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454598893] [2022-02-16 14:06:37,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:37,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:37,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:37,502 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:06:37,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-16 14:06:37,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:37,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:37,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:06:37,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:37,799 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-02-16 14:06:37,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 151 treesize of output 153 [2022-02-16 14:09:54,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:09:54,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 439 treesize of output 289 [2022-02-16 14:09:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:54,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:55,205 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-02-16 14:09:55,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 172 treesize of output 180 [2022-02-16 14:09:55,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:09:55,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 296 [2022-02-16 14:09:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:55,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454598893] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:55,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:55,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 29 [2022-02-16 14:09:55,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081727242] [2022-02-16 14:09:55,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:55,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:09:55,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:09:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:09:55,621 INFO L87 Difference]: Start difference. First operand 10523 states and 16277 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:55,894 INFO L93 Difference]: Finished difference Result 13647 states and 20995 transitions. [2022-02-16 14:09:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:09:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-16 14:09:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:55,915 INFO L225 Difference]: With dead ends: 13647 [2022-02-16 14:09:55,916 INFO L226 Difference]: Without dead ends: 13643 [2022-02-16 14:09:55,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:09:55,916 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 173 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:55,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1514 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 531 Invalid, 0 Unknown, 409 Unchecked, 0.2s Time] [2022-02-16 14:09:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13643 states. [2022-02-16 14:09:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13643 to 12359. [2022-02-16 14:09:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12359 states, 12358 states have (on average 1.5640880401359443) internal successors, (19329), 12358 states have internal predecessors, (19329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12359 states to 12359 states and 19329 transitions. [2022-02-16 14:09:56,110 INFO L78 Accepts]: Start accepts. Automaton has 12359 states and 19329 transitions. Word has length 42 [2022-02-16 14:09:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:56,110 INFO L470 AbstractCegarLoop]: Abstraction has 12359 states and 19329 transitions. [2022-02-16 14:09:56,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12359 states and 19329 transitions. [2022-02-16 14:09:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-16 14:09:56,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:56,117 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:56,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-16 14:09:56,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:56,329 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:09:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:56,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1615891721, now seen corresponding path program 89 times [2022-02-16 14:09:56,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:56,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607629012] [2022-02-16 14:09:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:56,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:09:56,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:56,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607629012] [2022-02-16 14:09:56,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607629012] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:56,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903612128] [2022-02-16 14:09:56,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:09:56,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:56,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:56,404 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:56,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-16 14:09:56,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-02-16 14:09:56,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-16 14:09:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:57,219 INFO L353 Elim1Store]: treesize reduction 751, result has 24.2 percent of original size [2022-02-16 14:09:57,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 187 treesize of output 314 [2022-02-16 14:09:57,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:09:57,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 409 treesize of output 286 [2022-02-16 14:09:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:09:57,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:57,971 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-02-16 14:09:57,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 196 treesize of output 190 [2022-02-16 14:09:58,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:09:58,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 460 treesize of output 296 [2022-02-16 14:09:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:09:58,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903612128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:58,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:58,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 35 [2022-02-16 14:09:58,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732301767] [2022-02-16 14:09:58,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:58,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:09:58,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:09:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:09:58,470 INFO L87 Difference]: Start difference. First operand 12359 states and 19329 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:58,996 INFO L93 Difference]: Finished difference Result 14458 states and 22557 transitions. [2022-02-16 14:09:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:09:58,996 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-16 14:09:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:59,023 INFO L225 Difference]: With dead ends: 14458 [2022-02-16 14:09:59,023 INFO L226 Difference]: Without dead ends: 14450 [2022-02-16 14:09:59,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:09:59,023 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 227 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:59,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1474 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:09:59,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14450 states. [2022-02-16 14:09:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14450 to 13887. [2022-02-16 14:09:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13887 states, 13886 states have (on average 1.575543713092323) internal successors, (21878), 13886 states have internal predecessors, (21878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13887 states to 13887 states and 21878 transitions. [2022-02-16 14:09:59,262 INFO L78 Accepts]: Start accepts. Automaton has 13887 states and 21878 transitions. Word has length 42 [2022-02-16 14:09:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:59,262 INFO L470 AbstractCegarLoop]: Abstraction has 13887 states and 21878 transitions. [2022-02-16 14:09:59,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 13887 states and 21878 transitions. [2022-02-16 14:09:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-16 14:09:59,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:59,270 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:59,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-02-16 14:09:59,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-02-16 14:09:59,491 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:09:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1399367177, now seen corresponding path program 90 times [2022-02-16 14:09:59,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:59,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103253828] [2022-02-16 14:09:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:59,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:09:59,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:59,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103253828] [2022-02-16 14:09:59,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103253828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:59,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066197134] [2022-02-16 14:09:59,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:09:59,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:59,555 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:59,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-16 14:09:59,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-02-16 14:09:59,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-16 14:09:59,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:00,299 INFO L353 Elim1Store]: treesize reduction 664, result has 22.7 percent of original size [2022-02-16 14:10:00,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 19 new quantified variables, introduced 66 case distinctions, treesize of input 264 treesize of output 277 [2022-02-16 14:10:00,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:00,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 359 treesize of output 286 [2022-02-16 14:10:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:00,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:01,470 INFO L353 Elim1Store]: treesize reduction 124, result has 44.9 percent of original size [2022-02-16 14:10:01,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 212 treesize of output 218 [2022-02-16 14:10:01,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:01,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 486 treesize of output 296 [2022-02-16 14:10:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:01,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066197134] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:01,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:01,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-02-16 14:10:01,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424035146] [2022-02-16 14:10:01,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:01,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:10:01,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:10:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:10:01,961 INFO L87 Difference]: Start difference. First operand 13887 states and 21878 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:02,376 INFO L93 Difference]: Finished difference Result 14927 states and 23436 transitions. [2022-02-16 14:10:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:10:02,377 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-16 14:10:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:02,404 INFO L225 Difference]: With dead ends: 14927 [2022-02-16 14:10:02,404 INFO L226 Difference]: Without dead ends: 14921 [2022-02-16 14:10:02,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:10:02,405 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 158 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:02,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1157 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:10:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14921 states. [2022-02-16 14:10:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14921 to 14608. [2022-02-16 14:10:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14608 states, 14607 states have (on average 1.5778736222359142) internal successors, (23048), 14607 states have internal predecessors, (23048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14608 states to 14608 states and 23048 transitions. [2022-02-16 14:10:02,655 INFO L78 Accepts]: Start accepts. Automaton has 14608 states and 23048 transitions. Word has length 42 [2022-02-16 14:10:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:02,655 INFO L470 AbstractCegarLoop]: Abstraction has 14608 states and 23048 transitions. [2022-02-16 14:10:02,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 14608 states and 23048 transitions. [2022-02-16 14:10:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-16 14:10:02,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:02,663 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:02,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-16 14:10:02,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:02,864 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:10:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:02,865 INFO L85 PathProgramCache]: Analyzing trace with hash 522289399, now seen corresponding path program 91 times [2022-02-16 14:10:02,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:02,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138276531] [2022-02-16 14:10:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:02,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:10:02,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:02,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138276531] [2022-02-16 14:10:02,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138276531] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:02,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128186573] [2022-02-16 14:10:02,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:10:02,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:02,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:02,924 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:02,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-16 14:10:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:02,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:10:02,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:03,421 INFO L353 Elim1Store]: treesize reduction 375, result has 30.7 percent of original size [2022-02-16 14:10:03,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 45 case distinctions, treesize of input 207 treesize of output 226 [2022-02-16 14:10:05,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:05,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 321 treesize of output 286 [2022-02-16 14:10:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:05,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:05,839 INFO L353 Elim1Store]: treesize reduction 184, result has 36.3 percent of original size [2022-02-16 14:10:05,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 220 treesize of output 242 [2022-02-16 14:10:05,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:05,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-02-16 14:10:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:06,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128186573] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:06,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:06,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 33 [2022-02-16 14:10:06,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470344413] [2022-02-16 14:10:06,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:06,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:10:06,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:10:06,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:10:06,465 INFO L87 Difference]: Start difference. First operand 14608 states and 23048 transitions. Second operand has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:06,932 INFO L93 Difference]: Finished difference Result 15563 states and 24457 transitions. [2022-02-16 14:10:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:10:06,932 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-16 14:10:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:06,955 INFO L225 Difference]: With dead ends: 15563 [2022-02-16 14:10:06,955 INFO L226 Difference]: Without dead ends: 15553 [2022-02-16 14:10:06,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:10:06,956 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 207 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:06,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1554 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1058 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2022-02-16 14:10:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15553 states. [2022-02-16 14:10:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15553 to 15146. [2022-02-16 14:10:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15146 states, 15145 states have (on average 1.5803235391218224) internal successors, (23934), 15145 states have internal predecessors, (23934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15146 states to 15146 states and 23934 transitions. [2022-02-16 14:10:07,180 INFO L78 Accepts]: Start accepts. Automaton has 15146 states and 23934 transitions. Word has length 42 [2022-02-16 14:10:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:07,180 INFO L470 AbstractCegarLoop]: Abstraction has 15146 states and 23934 transitions. [2022-02-16 14:10:07,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 15146 states and 23934 transitions. [2022-02-16 14:10:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-16 14:10:07,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:07,188 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:07,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-16 14:10:07,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:07,389 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:10:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash 398321655, now seen corresponding path program 92 times [2022-02-16 14:10:07,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:07,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829740395] [2022-02-16 14:10:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:07,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:10:07,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:07,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829740395] [2022-02-16 14:10:07,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829740395] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:07,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319793677] [2022-02-16 14:10:07,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:10:07,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:07,446 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:07,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-16 14:10:07,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:10:07,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:07,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:10:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:07,882 INFO L353 Elim1Store]: treesize reduction 228, result has 40.8 percent of original size [2022-02-16 14:10:07,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 205 treesize of output 213 [2022-02-16 14:10:19,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:19,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 311 treesize of output 286 [2022-02-16 14:10:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:19,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:20,474 INFO L353 Elim1Store]: treesize reduction 252, result has 30.2 percent of original size [2022-02-16 14:10:20,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 220 treesize of output 262 [2022-02-16 14:10:20,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:20,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-02-16 14:10:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:20,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319793677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:20,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:20,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 32 [2022-02-16 14:10:20,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144691659] [2022-02-16 14:10:20,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:20,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 14:10:20,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 14:10:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:10:20,982 INFO L87 Difference]: Start difference. First operand 15146 states and 23934 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:21,459 INFO L93 Difference]: Finished difference Result 15893 states and 25025 transitions. [2022-02-16 14:10:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:10:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-16 14:10:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:21,483 INFO L225 Difference]: With dead ends: 15893 [2022-02-16 14:10:21,483 INFO L226 Difference]: Without dead ends: 15883 [2022-02-16 14:10:21,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:10:21,484 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 202 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:21,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1603 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1026 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-02-16 14:10:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2022-02-16 14:10:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15525. [2022-02-16 14:10:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15525 states, 15524 states have (on average 1.58206647771193) internal successors, (24560), 15524 states have internal predecessors, (24560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15525 states to 15525 states and 24560 transitions. [2022-02-16 14:10:21,742 INFO L78 Accepts]: Start accepts. Automaton has 15525 states and 24560 transitions. Word has length 42 [2022-02-16 14:10:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:21,742 INFO L470 AbstractCegarLoop]: Abstraction has 15525 states and 24560 transitions. [2022-02-16 14:10:21,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 15525 states and 24560 transitions. [2022-02-16 14:10:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-16 14:10:21,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:21,750 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:21,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-16 14:10:21,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:21,950 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:10:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1524403959, now seen corresponding path program 93 times [2022-02-16 14:10:21,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:21,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231458604] [2022-02-16 14:10:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:21,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:10:22,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:22,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231458604] [2022-02-16 14:10:22,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231458604] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:22,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452978348] [2022-02-16 14:10:22,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:10:22,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:22,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:22,013 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:22,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-16 14:10:22,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-16 14:10:22,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:22,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-16 14:10:22,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:22,670 INFO L353 Elim1Store]: treesize reduction 205, result has 39.2 percent of original size [2022-02-16 14:10:22,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 264 treesize of output 220 [2022-02-16 14:10:22,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:22,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 305 treesize of output 286 [2022-02-16 14:10:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:23,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:23,987 INFO L353 Elim1Store]: treesize reduction 328, result has 25.6 percent of original size [2022-02-16 14:10:23,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 212 treesize of output 278 [2022-02-16 14:10:24,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:24,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 296 [2022-02-16 14:10:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:24,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452978348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:24,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:24,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-02-16 14:10:24,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120182965] [2022-02-16 14:10:24,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:24,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:10:24,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:10:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:10:24,653 INFO L87 Difference]: Start difference. First operand 15525 states and 24560 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:25,240 INFO L93 Difference]: Finished difference Result 16064 states and 25329 transitions. [2022-02-16 14:10:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:10:25,240 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-16 14:10:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:25,262 INFO L225 Difference]: With dead ends: 16064 [2022-02-16 14:10:25,262 INFO L226 Difference]: Without dead ends: 16058 [2022-02-16 14:10:25,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:10:25,262 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 238 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:25,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1650 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:10:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16058 states. [2022-02-16 14:10:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16058 to 15775. [2022-02-16 14:10:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.5832382401420058) internal successors, (24974), 15774 states have internal predecessors, (24974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 24974 transitions. [2022-02-16 14:10:25,486 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 24974 transitions. Word has length 42 [2022-02-16 14:10:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:25,486 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 24974 transitions. [2022-02-16 14:10:25,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 24974 transitions. [2022-02-16 14:10:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-16 14:10:25,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:25,494 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:25,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:25,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:25,695 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:10:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:25,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1357739511, now seen corresponding path program 94 times [2022-02-16 14:10:25,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:25,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678808644] [2022-02-16 14:10:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:25,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:10:25,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:25,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678808644] [2022-02-16 14:10:25,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678808644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:25,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117614632] [2022-02-16 14:10:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:10:25,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:25,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:25,767 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:25,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-16 14:10:25,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:10:25,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:25,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:10:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:26,083 INFO L353 Elim1Store]: treesize reduction 72, result has 60.2 percent of original size [2022-02-16 14:10:26,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 177 treesize of output 163 [2022-02-16 14:12:08,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:12:08,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 315 treesize of output 286 [2022-02-16 14:12:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:12:09,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:12:09,850 INFO L353 Elim1Store]: treesize reduction 412, result has 22.1 percent of original size [2022-02-16 14:12:09,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 196 treesize of output 290 [2022-02-16 14:12:09,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:12:09,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 494 treesize of output 296 [2022-02-16 14:12:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:12:10,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117614632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:12:10,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:12:10,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 30 [2022-02-16 14:12:10,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532327365] [2022-02-16 14:12:10,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:12:10,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 14:12:10,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:12:10,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 14:12:10,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:12:10,444 INFO L87 Difference]: Start difference. First operand 15775 states and 24974 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:10,893 INFO L93 Difference]: Finished difference Result 16279 states and 25660 transitions. [2022-02-16 14:12:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:12:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-16 14:12:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:10,919 INFO L225 Difference]: With dead ends: 16279 [2022-02-16 14:12:10,919 INFO L226 Difference]: Without dead ends: 16269 [2022-02-16 14:12:10,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:12:10,920 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 228 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:10,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1786 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 918 Invalid, 0 Unknown, 425 Unchecked, 0.4s Time] [2022-02-16 14:12:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16269 states. [2022-02-16 14:12:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16269 to 15555. [2022-02-16 14:12:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15555 states, 15554 states have (on average 1.585894303716086) internal successors, (24667), 15554 states have internal predecessors, (24667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15555 states to 15555 states and 24667 transitions. [2022-02-16 14:12:11,167 INFO L78 Accepts]: Start accepts. Automaton has 15555 states and 24667 transitions. Word has length 42 [2022-02-16 14:12:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:12:11,167 INFO L470 AbstractCegarLoop]: Abstraction has 15555 states and 24667 transitions. [2022-02-16 14:12:11,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 15555 states and 24667 transitions. [2022-02-16 14:12:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-16 14:12:11,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:12:11,176 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:12:11,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-16 14:12:11,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-16 14:12:11,377 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:12:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:12:11,377 INFO L85 PathProgramCache]: Analyzing trace with hash 106994935, now seen corresponding path program 95 times [2022-02-16 14:12:11,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:12:11,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176949876] [2022-02-16 14:12:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:12:11,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:12:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:12:11,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:12:11,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176949876] [2022-02-16 14:12:11,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176949876] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:12:11,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589347043] [2022-02-16 14:12:11,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:12:11,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:12:11,451 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:12:11,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-16 14:12:11,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-16 14:12:11,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:12:11,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:12:11,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:12:11,782 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-02-16 14:12:11,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 151 treesize of output 153 Received shutdown request... [2022-02-16 14:15:05,569 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-16 14:15:05,571 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-16 14:15:05,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-16 14:15:05,597 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:15:05,597 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:15:05,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-02-16 14:15:05,772 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. [2022-02-16 14:15:05,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-16 14:15:05,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-16 14:15:05,774 INFO L732 BasicCegarLoop]: Path program histogram: [95, 1, 1, 1] [2022-02-16 14:15:05,776 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 14:15:05,776 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 14:15:05,777 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:15:05 BasicIcfg [2022-02-16 14:15:05,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 14:15:05,778 INFO L158 Benchmark]: Toolchain (without parser) took 723926.90ms. Allocated memory was 184.5MB in the beginning and 914.4MB in the end (delta: 729.8MB). Free memory was 145.0MB in the beginning and 590.8MB in the end (delta: -445.7MB). Peak memory consumption was 639.5MB. Max. memory is 8.0GB. [2022-02-16 14:15:05,778 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 184.5MB. Free memory is still 146.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 14:15:05,778 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.76ms. Allocated memory is still 184.5MB. Free memory was 145.0MB in the beginning and 143.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-16 14:15:05,778 INFO L158 Benchmark]: Boogie Preprocessor took 18.26ms. Allocated memory is still 184.5MB. Free memory was 143.4MB in the beginning and 142.5MB in the end (delta: 945.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 14:15:05,778 INFO L158 Benchmark]: RCFGBuilder took 246.31ms. Allocated memory is still 184.5MB. Free memory was 142.4MB in the beginning and 133.5MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-16 14:15:05,778 INFO L158 Benchmark]: TraceAbstraction took 723631.40ms. Allocated memory was 184.5MB in the beginning and 914.4MB in the end (delta: 729.8MB). Free memory was 133.0MB in the beginning and 590.8MB in the end (delta: -457.8MB). Peak memory consumption was 627.0MB. Max. memory is 8.0GB. [2022-02-16 14:15:05,778 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 0.15ms. Allocated memory is still 184.5MB. Free memory is still 146.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.76ms. Allocated memory is still 184.5MB. Free memory was 145.0MB in the beginning and 143.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.26ms. Allocated memory is still 184.5MB. Free memory was 143.4MB in the beginning and 142.5MB in the end (delta: 945.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 246.31ms. Allocated memory is still 184.5MB. Free memory was 142.4MB in the beginning and 133.5MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 723631.40ms. Allocated memory was 184.5MB in the beginning and 914.4MB in the end (delta: 729.8MB). Free memory was 133.0MB in the beginning and 590.8MB in the end (delta: -457.8MB). Peak memory consumption was 627.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 723.5s, OverallIterations: 98, TraceHistogramMax: 7, PathProgramHistogramMax: 95, EmptinessCheckTime: 0.3s, AutomataDifference: 84.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, PartialOrderReductionTime: 0.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19996 SdHoareTripleChecker+Valid, 22.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19996 mSDsluCounter, 37654 SdHoareTripleChecker+Invalid, 19.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2432 IncrementalHoareTripleChecker+Unchecked, 46209 mSDsCounter, 5941 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49673 IncrementalHoareTripleChecker+Invalid, 58046 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5941 mSolverCounterUnsat, 3270 mSDtfsCounter, 49673 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10671 GetRequests, 4669 SyntacticMatches, 55 SemanticMatches, 5947 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222678 ImplicationChecksByTransitivity, 83.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15775occurred in iteration=96, InterpolantAutomatonStates: 4429, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.1s AutomataMinimizationTime, 97 MinimizatonAttempts, 69878 StatesRemovedByMinimization, 97 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 435.7s InterpolantComputationTime, 6164 NumberOfCodeBlocks, 6164 NumberOfCodeBlocksAsserted, 451 NumberOfCheckSat, 8937 ConstructedInterpolants, 94 QuantifiedInterpolants, 135769 SizeOfPredicates, 559 NumberOfNonLiveVariables, 8729 ConjunctsInSsa, 1914 ConjunctsInUnsatCore, 285 InterpolantComputations, 4 PerfectInterpolantSequences, 4151/13830 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown