/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:58:03,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:58:03,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:58:03,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:58:03,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:58:03,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:58:03,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:58:03,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:58:03,806 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:58:03,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:58:03,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:58:03,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:58:03,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:58:03,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:58:03,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:58:03,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:58:03,808 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:58:03,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:58:03,809 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:58:03,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:58:03,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:58:03,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:58:03,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:58:03,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:58:03,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:58:03,810 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:58:03,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:58:03,810 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:58:03,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:58:03,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:58:03,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:58:03,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:58:03,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:58:03,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:58:03,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:58:03,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:58:03,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:58:03,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:58:03,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:58:03,813 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:58:03,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:58:03,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:58:04,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:58:04,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:58:04,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:58:04,039 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:58:04,042 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:58:04,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl [2022-03-03 19:58:04,044 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl' [2022-03-03 19:58:04,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:58:04,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:58:04,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:58:04,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:58:04,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:58:04,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,094 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:58:04,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:58:04,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:58:04,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:58:04,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:58:04,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:58:04,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:58:04,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:58:04,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:58:04,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/1) ... [2022-03-03 19:58:04,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:58:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:04,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:58:04,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:58:04,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:58:04,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:58:04,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:58:04,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:58:04,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:58:04,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:58:04,179 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:58:04,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:58:04,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:58:04,180 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:58:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:58:04,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:58:04,181 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:58:04,227 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:58:04,229 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:58:04,308 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:58:04,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:58:04,321 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:58:04,323 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:58:04 BoogieIcfgContainer [2022-03-03 19:58:04,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:58:04,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:58:04,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:58:04,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:58:04,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:58:04" (1/2) ... [2022-03-03 19:58:04,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a9cd8 and model type max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:58:04, skipping insertion in model container [2022-03-03 19:58:04,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:58:04" (2/2) ... [2022-03-03 19:58:04,330 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array.wvr.bpl [2022-03-03 19:58:04,334 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:58:04,334 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:58:04,335 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:58:04,335 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:58:04,367 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:58:04,428 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:58:04,434 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:58:04,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:58:04,464 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-03 19:58:04,525 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:58:04,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:04,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:04,536 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-03-03 19:58:04,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:04,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115657110] [2022-03-03 19:58:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:04,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:04,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:04,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115657110] [2022-03-03 19:58:04,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115657110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:58:04,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:58:04,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:58:04,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129538097] [2022-03-03 19:58:04,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:58:04,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:58:04,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:58:04,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:58:04,756 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:04,804 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-03 19:58:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:58:04,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:58:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:04,818 INFO L225 Difference]: With dead ends: 217 [2022-03-03 19:58:04,818 INFO L226 Difference]: Without dead ends: 202 [2022-03-03 19:58:04,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:58:04,823 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:04,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:58:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-03 19:58:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-03 19:58:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-03 19:58:04,901 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-03 19:58:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:04,902 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-03 19:58:04,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-03 19:58:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:58:04,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:04,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:04,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:58:04,905 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-03-03 19:58:04,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:04,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248102703] [2022-03-03 19:58:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:04,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:04,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:04,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248102703] [2022-03-03 19:58:04,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248102703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:58:04,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:58:04,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:58:04,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508551073] [2022-03-03 19:58:04,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:58:04,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:58:04,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:58:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:58:04,979 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:05,029 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-03 19:58:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:58:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:58:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:05,031 INFO L225 Difference]: With dead ends: 158 [2022-03-03 19:58:05,031 INFO L226 Difference]: Without dead ends: 158 [2022-03-03 19:58:05,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:58:05,033 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:05,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:58:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-03 19:58:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-03 19:58:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-03 19:58:05,048 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-03 19:58:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:05,048 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-03 19:58:05,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-03 19:58:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:58:05,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:05,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:05,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:58:05,051 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-03-03 19:58:05,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:05,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194655694] [2022-03-03 19:58:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:05,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:05,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194655694] [2022-03-03 19:58:05,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194655694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:58:05,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:58:05,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:58:05,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49428020] [2022-03-03 19:58:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:58:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:58:05,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:58:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:58:05,139 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:05,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:05,214 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-03 19:58:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:58:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:58:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:05,217 INFO L225 Difference]: With dead ends: 183 [2022-03-03 19:58:05,218 INFO L226 Difference]: Without dead ends: 183 [2022-03-03 19:58:05,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:58:05,219 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:05,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:58:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-03 19:58:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-03 19:58:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-03 19:58:05,237 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-03 19:58:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:05,237 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-03 19:58:05,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-03 19:58:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:58:05,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:05,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:05,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:58:05,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:05,241 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-03-03 19:58:05,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:05,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190341568] [2022-03-03 19:58:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:05,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:05,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:05,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190341568] [2022-03-03 19:58:05,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190341568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:05,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430211264] [2022-03-03 19:58:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:05,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:05,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:05,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:58:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:05,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:58:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:06,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:06,175 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-03-03 19:58:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:06,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:06,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:06,460 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 47 treesize of output 43 [2022-03-03 19:58:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:06,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430211264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:06,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:06,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:58:06,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341493622] [2022-03-03 19:58:06,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:06,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:58:06,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:06,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:58:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:58:06,674 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:07,027 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-03 19:58:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:58:07,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:58:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:07,031 INFO L225 Difference]: With dead ends: 366 [2022-03-03 19:58:07,031 INFO L226 Difference]: Without dead ends: 351 [2022-03-03 19:58:07,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:58:07,032 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 197 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:07,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 61 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-03 19:58:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-03 19:58:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-03 19:58:07,057 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-03 19:58:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:07,057 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-03 19:58:07,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-03 19:58:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:58:07,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:07,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:07,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-03 19:58:07,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:07,284 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-03-03 19:58:07,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:07,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951998162] [2022-03-03 19:58:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:07,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:07,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:07,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951998162] [2022-03-03 19:58:07,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951998162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:07,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737925123] [2022-03-03 19:58:07,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:07,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:07,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:07,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:07,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:58:07,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:58:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:07,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:07,760 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 45 treesize of output 41 [2022-03-03 19:58:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:08,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:08,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:08,339 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 47 treesize of output 43 [2022-03-03 19:58:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:08,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737925123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:08,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:08,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-03-03 19:58:08,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673012079] [2022-03-03 19:58:08,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:08,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:58:08,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:58:08,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:58:08,522 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) 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) [2022-03-03 19:58:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:09,686 INFO L93 Difference]: Finished difference Result 508 states and 1467 transitions. [2022-03-03 19:58:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:58:09,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) 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 22 [2022-03-03 19:58:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:09,690 INFO L225 Difference]: With dead ends: 508 [2022-03-03 19:58:09,691 INFO L226 Difference]: Without dead ends: 493 [2022-03-03 19:58:09,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:58:09,692 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 296 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:09,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 129 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:58:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-03-03 19:58:09,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 229. [2022-03-03 19:58:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-03 19:58:09,705 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-03 19:58:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:09,705 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-03 19:58:09,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) 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) [2022-03-03 19:58:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-03 19:58:09,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:58:09,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:09,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:09,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:09,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:09,930 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-03-03 19:58:09,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:09,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277128642] [2022-03-03 19:58:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:10,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:10,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277128642] [2022-03-03 19:58:10,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277128642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:10,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185631437] [2022-03-03 19:58:10,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:10,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:10,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:10,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:10,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:58:10,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:58:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:10,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:58:10,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:10,294 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 43 treesize of output 31 [2022-03-03 19:58:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:10,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:10,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:10,443 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 47 treesize of output 43 [2022-03-03 19:58:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:10,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185631437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:10,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:10,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:58:10,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095714468] [2022-03-03 19:58:10,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:10,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:58:10,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:10,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:58:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:58:10,593 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:10,992 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-03-03 19:58:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:58:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:58:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:10,995 INFO L225 Difference]: With dead ends: 418 [2022-03-03 19:58:10,995 INFO L226 Difference]: Without dead ends: 403 [2022-03-03 19:58:10,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:58:10,996 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:10,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 115 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-03 19:58:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-03-03 19:58:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-03 19:58:11,005 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-03 19:58:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:11,005 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-03 19:58:11,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-03 19:58:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:58:11,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:11,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:11,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:11,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:11,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:11,220 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-03-03 19:58:11,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:11,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943264189] [2022-03-03 19:58:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:11,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:11,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943264189] [2022-03-03 19:58:11,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943264189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:11,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726164457] [2022-03-03 19:58:11,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:11,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:11,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:11,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:11,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:58:11,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:11,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:11,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:58:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:11,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:11,654 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 45 treesize of output 41 [2022-03-03 19:58:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:11,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:12,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:12,076 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 47 treesize of output 43 [2022-03-03 19:58:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:12,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726164457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:12,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:12,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:58:12,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537755461] [2022-03-03 19:58:12,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:12,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:58:12,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:58:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:58:12,229 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:12,531 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-03-03 19:58:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:58:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:58:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:12,533 INFO L225 Difference]: With dead ends: 381 [2022-03-03 19:58:12,533 INFO L226 Difference]: Without dead ends: 366 [2022-03-03 19:58:12,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:58:12,534 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:12,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 127 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 303 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-03-03 19:58:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-03 19:58:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-03-03 19:58:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-03-03 19:58:12,543 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-03-03 19:58:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:12,544 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-03-03 19:58:12,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-03-03 19:58:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:58:12,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:12,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:12,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:12,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:12,763 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-03-03 19:58:12,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:12,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493641309] [2022-03-03 19:58:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:12,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:12,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493641309] [2022-03-03 19:58:12,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493641309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:12,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291355617] [2022-03-03 19:58:12,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:12,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:12,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:58:12,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:58:12,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:58:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:13,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:13,173 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 45 treesize of output 41 [2022-03-03 19:58:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:13,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:13,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:13,845 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 47 treesize of output 43 [2022-03-03 19:58:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:14,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291355617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:14,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:14,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-03-03 19:58:14,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144140104] [2022-03-03 19:58:14,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:14,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:58:14,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:58:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:58:14,006 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2022-03-03 19:58:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:18,796 INFO L93 Difference]: Finished difference Result 1120 states and 3300 transitions. [2022-03-03 19:58:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:58:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 22 [2022-03-03 19:58:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:18,803 INFO L225 Difference]: With dead ends: 1120 [2022-03-03 19:58:18,803 INFO L226 Difference]: Without dead ends: 1090 [2022-03-03 19:58:18,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1386, Invalid=5420, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 19:58:18,806 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 453 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:18,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 337 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1002 Invalid, 0 Unknown, 288 Unchecked, 0.7s Time] [2022-03-03 19:58:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-03 19:58:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 261. [2022-03-03 19:58:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.019230769230769) internal successors, (785), 260 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 785 transitions. [2022-03-03 19:58:18,820 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 785 transitions. Word has length 22 [2022-03-03 19:58:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:18,821 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 785 transitions. [2022-03-03 19:58:18,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2022-03-03 19:58:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 785 transitions. [2022-03-03 19:58:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:58:18,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:18,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:18,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:19,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:19,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:19,043 INFO L85 PathProgramCache]: Analyzing trace with hash 151290546, now seen corresponding path program 6 times [2022-03-03 19:58:19,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:19,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354212499] [2022-03-03 19:58:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:19,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:19,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:19,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354212499] [2022-03-03 19:58:19,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354212499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:19,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341598579] [2022-03-03 19:58:19,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:19,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:19,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:19,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:19,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:58:19,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:58:19,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:19,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:58:19,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:19,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:19,380 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 45 treesize of output 41 [2022-03-03 19:58:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:19,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:19,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:19,762 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 47 treesize of output 43 [2022-03-03 19:58:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:19,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341598579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:19,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:19,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-03-03 19:58:19,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755064867] [2022-03-03 19:58:19,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:19,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:58:19,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:58:19,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:58:19,919 INFO L87 Difference]: Start difference. First operand 261 states and 785 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:20,860 INFO L93 Difference]: Finished difference Result 585 states and 1722 transitions. [2022-03-03 19:58:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:58:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:58:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:20,864 INFO L225 Difference]: With dead ends: 585 [2022-03-03 19:58:20,864 INFO L226 Difference]: Without dead ends: 570 [2022-03-03 19:58:20,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:58:20,867 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 170 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:20,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 132 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-03 19:58:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 258. [2022-03-03 19:58:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-03-03 19:58:20,877 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-03-03 19:58:20,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:20,877 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-03-03 19:58:20,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-03-03 19:58:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:20,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:20,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:20,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-03 19:58:21,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:21,096 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-03-03 19:58:21,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:21,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232168718] [2022-03-03 19:58:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:21,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:21,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:21,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232168718] [2022-03-03 19:58:21,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232168718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:21,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370264924] [2022-03-03 19:58:21,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:21,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:21,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:21,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:21,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:58:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:21,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:21,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370264924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:21,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:21,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:58:21,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980291328] [2022-03-03 19:58:21,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:21,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:58:21,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:21,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:58:21,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:58:21,382 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:22,175 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-03-03 19:58:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:58:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:22,180 INFO L225 Difference]: With dead ends: 1123 [2022-03-03 19:58:22,180 INFO L226 Difference]: Without dead ends: 1123 [2022-03-03 19:58:22,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:58:22,182 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 302 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:22,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 187 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-03 19:58:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-03-03 19:58:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-03-03 19:58:22,198 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-03-03 19:58:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:22,199 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-03-03 19:58:22,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-03-03 19:58:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:22,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:22,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:22,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:22,419 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-03-03 19:58:22,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:22,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250273772] [2022-03-03 19:58:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:22,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:22,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250273772] [2022-03-03 19:58:22,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250273772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:22,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598189046] [2022-03-03 19:58:22,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:22,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:22,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:22,475 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:22,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:58:22,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:22,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:22,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:22,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:22,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:22,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598189046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:22,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:22,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:58:22,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773712805] [2022-03-03 19:58:22,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:22,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:58:22,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:58:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:58:22,701 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:24,589 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-03-03 19:58:24,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 19:58:24,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 [2022-03-03 19:58:24,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:24,618 INFO L225 Difference]: With dead ends: 1814 [2022-03-03 19:58:24,618 INFO L226 Difference]: Without dead ends: 1814 [2022-03-03 19:58:24,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:58:24,621 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 435 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:24,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 342 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:58:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-03-03 19:58:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-03-03 19:58:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-03 19:58:24,639 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-03 19:58:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:24,639 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-03 19:58:24,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-03 19:58:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:24,640 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:24,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:24,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:24,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-03 19:58:24,855 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-03-03 19:58:24,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:24,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472963845] [2022-03-03 19:58:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:24,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:24,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:24,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472963845] [2022-03-03 19:58:24,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472963845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:24,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490083173] [2022-03-03 19:58:24,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:24,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:24,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:24,903 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:24,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:58:24,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:58:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:25,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:25,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490083173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:25,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:25,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:58:25,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142157864] [2022-03-03 19:58:25,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:25,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:58:25,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:58:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:58:25,154 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:26,144 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-03 19:58:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:58:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 [2022-03-03 19:58:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:26,150 INFO L225 Difference]: With dead ends: 1470 [2022-03-03 19:58:26,150 INFO L226 Difference]: Without dead ends: 1470 [2022-03-03 19:58:26,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:58:26,151 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 426 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:26,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 233 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:58:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-03 19:58:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-03 19:58:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-03 19:58:26,167 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-03 19:58:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:26,168 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-03 19:58:26,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-03 19:58:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:26,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:26,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:26,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:26,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:26,383 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-03-03 19:58:26,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:26,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471411157] [2022-03-03 19:58:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:26,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:26,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:26,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471411157] [2022-03-03 19:58:26,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471411157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:26,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937121834] [2022-03-03 19:58:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:26,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:26,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:26,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:26,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:58:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:26,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:58:26,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:26,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937121834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:26,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:26,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:58:26,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603948162] [2022-03-03 19:58:26,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:26,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:58:26,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:58:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:58:26,575 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:26,731 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-03 19:58:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:58:26,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:26,735 INFO L225 Difference]: With dead ends: 685 [2022-03-03 19:58:26,735 INFO L226 Difference]: Without dead ends: 679 [2022-03-03 19:58:26,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:58:26,736 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:26,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 52 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:58:26,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-03 19:58:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-03 19:58:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-03 19:58:26,748 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-03 19:58:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:26,748 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-03 19:58:26,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-03 19:58:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:26,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:26,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:26,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:26,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 19:58:26,963 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-03-03 19:58:26,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:26,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97595047] [2022-03-03 19:58:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:26,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:27,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:27,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97595047] [2022-03-03 19:58:27,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97595047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:27,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405158064] [2022-03-03 19:58:27,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:27,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:27,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:27,007 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:27,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:58:27,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:27,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:27,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:27,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:27,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405158064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:27,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:27,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:58:27,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702617108] [2022-03-03 19:58:27,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:27,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:58:27,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:58:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:58:27,192 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:27,528 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-03 19:58:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:58:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 [2022-03-03 19:58:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:27,533 INFO L225 Difference]: With dead ends: 1159 [2022-03-03 19:58:27,533 INFO L226 Difference]: Without dead ends: 1111 [2022-03-03 19:58:27,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:58:27,534 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 272 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:27,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 117 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-03 19:58:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-03 19:58:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-03 19:58:27,553 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-03 19:58:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:27,554 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-03 19:58:27,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-03 19:58:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:27,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:27,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:27,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:27,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:58:27,775 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:27,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-03-03 19:58:27,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:27,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333586407] [2022-03-03 19:58:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:27,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:27,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:27,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333586407] [2022-03-03 19:58:27,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333586407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:27,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132208415] [2022-03-03 19:58:27,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:27,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:27,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:27,816 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:27,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:58:27,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:27,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:58:27,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:27,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:28,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132208415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:28,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:28,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:58:28,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027568493] [2022-03-03 19:58:28,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:28,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:58:28,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:58:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:58:28,012 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:28,218 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-03 19:58:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:58:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:28,223 INFO L225 Difference]: With dead ends: 1267 [2022-03-03 19:58:28,223 INFO L226 Difference]: Without dead ends: 1267 [2022-03-03 19:58:28,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:58:28,224 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:28,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 69 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:58:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-03 19:58:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-03 19:58:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-03 19:58:28,244 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-03 19:58:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:28,244 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-03 19:58:28,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-03 19:58:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:28,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:28,246 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:28,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:28,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 19:58:28,468 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-03-03 19:58:28,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:28,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265948130] [2022-03-03 19:58:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:28,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:28,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:28,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265948130] [2022-03-03 19:58:28,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265948130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:28,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318795396] [2022-03-03 19:58:28,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:28,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:28,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:28,533 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:28,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:58:28,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:58:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:28,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:28,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:28,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318795396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:28,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:28,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:58:28,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533321609] [2022-03-03 19:58:28,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:28,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:58:28,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:28,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:58:28,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:58:28,735 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-03 19:58:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:29,334 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-03 19:58:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:58:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-03 19:58:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:29,343 INFO L225 Difference]: With dead ends: 2268 [2022-03-03 19:58:29,343 INFO L226 Difference]: Without dead ends: 2268 [2022-03-03 19:58:29,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:58:29,344 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 237 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:29,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 194 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-03 19:58:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-03 19:58:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-03 19:58:29,375 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-03 19:58:29,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:29,375 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-03 19:58:29,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-03 19:58:29,375 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-03 19:58:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:29,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:29,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:29,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-03 19:58:29,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 19:58:29,599 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-03-03 19:58:29,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:29,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48185551] [2022-03-03 19:58:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:29,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:29,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:29,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48185551] [2022-03-03 19:58:29,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48185551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:29,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622522138] [2022-03-03 19:58:29,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:29,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:29,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:29,650 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:29,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:58:29,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:58:29,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:29,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:29,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:29,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622522138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:29,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:29,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:58:29,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247921423] [2022-03-03 19:58:29,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:29,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:58:29,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:29,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:58:29,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:58:29,830 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-03 19:58:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:30,544 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-03 19:58:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:58:30,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-03 19:58:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:30,555 INFO L225 Difference]: With dead ends: 2256 [2022-03-03 19:58:30,555 INFO L226 Difference]: Without dead ends: 2256 [2022-03-03 19:58:30,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:58:30,557 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 218 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:30,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 218 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-03 19:58:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-03 19:58:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-03 19:58:30,608 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-03 19:58:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:30,608 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-03 19:58:30,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-03 19:58:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-03 19:58:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:30,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:30,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:30,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:30,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:30,830 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-03-03 19:58:30,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:30,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823119195] [2022-03-03 19:58:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:30,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:30,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:30,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823119195] [2022-03-03 19:58:30,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823119195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:30,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65359575] [2022-03-03 19:58:30,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:30,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:30,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:30,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:30,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:58:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:30,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:31,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:31,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65359575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:31,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:31,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 19:58:31,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342840493] [2022-03-03 19:58:31,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:31,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:58:31,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:58:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:58:31,096 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:31,412 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-03 19:58:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:58:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:31,419 INFO L225 Difference]: With dead ends: 1611 [2022-03-03 19:58:31,419 INFO L226 Difference]: Without dead ends: 1611 [2022-03-03 19:58:31,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:58:31,420 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 204 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:31,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 145 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-03 19:58:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-03 19:58:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-03 19:58:31,447 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-03 19:58:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:31,447 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-03 19:58:31,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-03 19:58:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:31,450 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:31,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:31,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:31,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 19:58:31,673 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:31,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-03-03 19:58:31,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:31,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912258459] [2022-03-03 19:58:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:31,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:31,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912258459] [2022-03-03 19:58:31,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912258459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:31,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371297901] [2022-03-03 19:58:31,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:31,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:31,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:31,719 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:31,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:58:31,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:31,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:31,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371297901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:31,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:31,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:58:31,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160441628] [2022-03-03 19:58:31,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:31,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:58:31,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:58:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:58:31,898 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-03 19:58:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:32,415 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-03 19:58:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:58:32,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-03 19:58:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:32,421 INFO L225 Difference]: With dead ends: 2408 [2022-03-03 19:58:32,422 INFO L226 Difference]: Without dead ends: 2404 [2022-03-03 19:58:32,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:58:32,423 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 256 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:32,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 153 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-03 19:58:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-03 19:58:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-03 19:58:32,458 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-03 19:58:32,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:32,458 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-03 19:58:32,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-03 19:58:32,458 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-03 19:58:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:32,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:32,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:32,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:32,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:32,671 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-03-03 19:58:32,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:32,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245921455] [2022-03-03 19:58:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:32,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:32,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:32,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245921455] [2022-03-03 19:58:32,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245921455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:32,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61993571] [2022-03-03 19:58:32,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:32,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:32,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:32,722 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:32,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:58:32,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:58:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:32,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:32,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61993571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:32,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:32,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:58:32,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276594913] [2022-03-03 19:58:32,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:32,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:58:32,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:58:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:58:32,946 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:33,939 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-03 19:58:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:58:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:33,950 INFO L225 Difference]: With dead ends: 3509 [2022-03-03 19:58:33,951 INFO L226 Difference]: Without dead ends: 3509 [2022-03-03 19:58:33,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:58:33,953 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 450 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:33,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 291 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:58:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-03 19:58:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-03 19:58:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-03 19:58:34,003 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-03 19:58:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:34,003 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-03 19:58:34,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-03 19:58:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:34,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:34,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:34,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:34,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:34,231 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-03-03 19:58:34,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:34,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950972368] [2022-03-03 19:58:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:34,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:34,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950972368] [2022-03-03 19:58:34,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950972368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:34,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909880207] [2022-03-03 19:58:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:34,282 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:34,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:58:34,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:34,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:34,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:34,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:34,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:34,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909880207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:34,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:34,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:58:34,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855341426] [2022-03-03 19:58:34,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:34,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:58:34,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:34,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:58:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:58:34,475 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:35,679 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-03 19:58:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:58:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:35,688 INFO L225 Difference]: With dead ends: 3211 [2022-03-03 19:58:35,688 INFO L226 Difference]: Without dead ends: 3207 [2022-03-03 19:58:35,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:58:35,691 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 452 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:35,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 272 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:58:35,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-03 19:58:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-03 19:58:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 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) [2022-03-03 19:58:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-03 19:58:35,735 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-03 19:58:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:35,735 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-03 19:58:35,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-03 19:58:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:35,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:35,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:35,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:35,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:35,963 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-03-03 19:58:35,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:35,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149270682] [2022-03-03 19:58:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:35,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:35,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:35,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149270682] [2022-03-03 19:58:35,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149270682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:35,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373994845] [2022-03-03 19:58:35,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:35,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:35,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:35,998 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:36,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:58:36,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:58:36,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:36,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:58:36,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:36,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:36,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373994845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:36,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:36,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 19:58:36,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069329474] [2022-03-03 19:58:36,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:36,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:58:36,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:58:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:58:36,135 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-03-03 19:58:36,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:36,263 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-03 19:58:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:58:36,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 24 [2022-03-03 19:58:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:36,267 INFO L225 Difference]: With dead ends: 1333 [2022-03-03 19:58:36,267 INFO L226 Difference]: Without dead ends: 1333 [2022-03-03 19:58:36,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:58:36,268 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:36,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 65 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:58:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-03 19:58:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-03 19:58:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-03 19:58:36,292 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-03 19:58:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:36,292 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-03 19:58:36,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-03-03 19:58:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-03 19:58:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:36,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:36,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:36,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:36,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:36,515 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-03-03 19:58:36,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:36,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007660800] [2022-03-03 19:58:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:36,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:36,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:36,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007660800] [2022-03-03 19:58:36,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007660800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:36,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235127244] [2022-03-03 19:58:36,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:36,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:36,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:36,560 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:36,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:58:36,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:58:36,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:36,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:36,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:36,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235127244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:36,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:36,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:58:36,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010612640] [2022-03-03 19:58:36,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:36,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:58:36,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:58:36,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:58:36,702 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-03 19:58:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:37,046 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-03 19:58:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:58:37,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-03-03 19:58:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:37,054 INFO L225 Difference]: With dead ends: 2129 [2022-03-03 19:58:37,054 INFO L226 Difference]: Without dead ends: 2129 [2022-03-03 19:58:37,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:58:37,056 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 171 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:37,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 127 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-03 19:58:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-03 19:58:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-03 19:58:37,099 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-03 19:58:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:37,099 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-03 19:58:37,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-03 19:58:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-03 19:58:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:37,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:37,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:37,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:37,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-03 19:58:37,310 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-03-03 19:58:37,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:37,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151876541] [2022-03-03 19:58:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:37,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:37,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:37,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151876541] [2022-03-03 19:58:37,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151876541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:37,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81323199] [2022-03-03 19:58:37,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:37,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:37,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:37,348 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:37,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:58:37,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:58:37,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:37,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:37,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81323199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:37,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:37,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:58:37,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485368989] [2022-03-03 19:58:37,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:37,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:58:37,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:58:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:58:37,496 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-03 19:58:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:37,848 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-03 19:58:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:58:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-03-03 19:58:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:37,854 INFO L225 Difference]: With dead ends: 2262 [2022-03-03 19:58:37,855 INFO L226 Difference]: Without dead ends: 2262 [2022-03-03 19:58:37,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:58:37,856 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 183 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:37,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 122 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-03 19:58:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-03 19:58:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-03 19:58:37,890 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-03 19:58:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:37,891 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-03 19:58:37,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-03 19:58:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-03 19:58:37,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:37,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:37,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:37,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:38,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:58:38,107 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:38,108 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-03-03 19:58:38,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:38,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867573494] [2022-03-03 19:58:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:38,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867573494] [2022-03-03 19:58:38,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867573494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842331544] [2022-03-03 19:58:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:38,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:38,153 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:38,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:58:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:38,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:38,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:38,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:38,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842331544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:38,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:38,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 19:58:38,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487831784] [2022-03-03 19:58:38,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:38,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:58:38,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:38,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:58:38,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:58:38,320 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-03-03 19:58:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:38,588 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-03 19:58:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:58:38,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 [2022-03-03 19:58:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:38,591 INFO L225 Difference]: With dead ends: 1474 [2022-03-03 19:58:38,591 INFO L226 Difference]: Without dead ends: 1464 [2022-03-03 19:58:38,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:58:38,592 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 142 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:38,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 138 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-03 19:58:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-03 19:58:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-03 19:58:38,623 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-03 19:58:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:38,623 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-03 19:58:38,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-03-03 19:58:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-03 19:58:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:38,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:38,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:38,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:38,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:38,839 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:38,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-03-03 19:58:38,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:38,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485712934] [2022-03-03 19:58:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:38,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:38,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485712934] [2022-03-03 19:58:38,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485712934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:38,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171098655] [2022-03-03 19:58:38,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:38,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:38,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:38,880 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:38,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:58:38,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:38,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:38,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:38,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:38,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:39,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171098655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:39,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:39,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:58:39,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768830899] [2022-03-03 19:58:39,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:39,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:58:39,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:58:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:58:39,038 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-03 19:58:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:39,311 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-03 19:58:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:58:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-03-03 19:58:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:39,315 INFO L225 Difference]: With dead ends: 2318 [2022-03-03 19:58:39,315 INFO L226 Difference]: Without dead ends: 2314 [2022-03-03 19:58:39,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:58:39,316 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 184 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:39,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 114 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:58:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-03 19:58:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-03 19:58:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-03 19:58:39,342 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-03 19:58:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:39,342 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-03 19:58:39,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-03 19:58:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-03 19:58:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:39,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:39,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:39,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:39,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:39,567 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-03-03 19:58:39,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:39,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49028064] [2022-03-03 19:58:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:39,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:39,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:39,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49028064] [2022-03-03 19:58:39,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49028064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:39,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890686719] [2022-03-03 19:58:39,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:39,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:39,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:39,615 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:39,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:58:39,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:58:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:39,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:39,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:39,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890686719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:39,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:39,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:58:39,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725328603] [2022-03-03 19:58:39,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:39,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:58:39,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:58:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:58:39,749 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-03 19:58:40,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:40,076 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-03 19:58:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:58:40,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-03-03 19:58:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:40,082 INFO L225 Difference]: With dead ends: 2302 [2022-03-03 19:58:40,082 INFO L226 Difference]: Without dead ends: 2290 [2022-03-03 19:58:40,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:58:40,083 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:40,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 148 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-03 19:58:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-03 19:58:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-03 19:58:40,117 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-03 19:58:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:40,117 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-03 19:58:40,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-03 19:58:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-03 19:58:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:40,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:40,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:40,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:58:40,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 19:58:40,345 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-03-03 19:58:40,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:40,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587530689] [2022-03-03 19:58:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:40,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:40,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:40,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587530689] [2022-03-03 19:58:40,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587530689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:40,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025528991] [2022-03-03 19:58:40,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:40,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:40,393 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:40,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:58:40,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:40,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:40,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:40,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:40,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025528991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:40,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:40,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:58:40,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9988120] [2022-03-03 19:58:40,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:40,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:58:40,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:58:40,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:58:40,604 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:41,469 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-03 19:58:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:58:41,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 [2022-03-03 19:58:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:41,479 INFO L225 Difference]: With dead ends: 4760 [2022-03-03 19:58:41,480 INFO L226 Difference]: Without dead ends: 4760 [2022-03-03 19:58:41,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:58:41,481 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 470 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:41,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 222 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:58:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-03 19:58:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-03 19:58:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-03 19:58:41,530 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-03 19:58:41,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:41,530 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-03 19:58:41,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-03 19:58:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:41,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:41,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:41,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:41,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:58:41,741 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:41,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-03-03 19:58:41,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:41,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752759815] [2022-03-03 19:58:41,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:41,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:41,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:41,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752759815] [2022-03-03 19:58:41,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752759815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:41,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194679413] [2022-03-03 19:58:41,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:41,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:41,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:41,782 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:41,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:58:41,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:58:41,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:41,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:41,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:42,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194679413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:42,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:42,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:58:42,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588034122] [2022-03-03 19:58:42,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:42,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:58:42,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:58:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:58:42,002 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:42,708 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-03 19:58:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:58:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 [2022-03-03 19:58:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:42,716 INFO L225 Difference]: With dead ends: 4260 [2022-03-03 19:58:42,716 INFO L226 Difference]: Without dead ends: 4260 [2022-03-03 19:58:42,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:58:42,717 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 359 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:42,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 205 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-03 19:58:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-03 19:58:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-03 19:58:42,776 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-03 19:58:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-03 19:58:42,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-03 19:58:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:42,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:42,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:42,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:42,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:58:42,995 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-03-03 19:58:42,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:42,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923677823] [2022-03-03 19:58:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:42,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:43,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:43,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923677823] [2022-03-03 19:58:43,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923677823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:43,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766568838] [2022-03-03 19:58:43,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:43,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:43,038 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:43,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:58:43,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:58:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:43,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:43,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766568838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:43,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:43,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 19:58:43,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100710036] [2022-03-03 19:58:43,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:43,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:58:43,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:58:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:58:43,216 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:43,884 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-03 19:58:43,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:58:43,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-03-03 19:58:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:43,893 INFO L225 Difference]: With dead ends: 4602 [2022-03-03 19:58:43,893 INFO L226 Difference]: Without dead ends: 4602 [2022-03-03 19:58:43,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:58:43,894 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 306 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:43,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 202 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-03 19:58:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-03 19:58:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-03 19:58:43,955 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-03 19:58:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:43,955 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-03 19:58:43,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-03 19:58:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:43,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:43,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:43,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:44,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:44,181 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-03-03 19:58:44,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:44,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475695355] [2022-03-03 19:58:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:44,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:44,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:44,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475695355] [2022-03-03 19:58:44,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475695355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:44,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796431015] [2022-03-03 19:58:44,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:44,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:44,223 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:44,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:58:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:44,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:44,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:44,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796431015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:44,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:44,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 19:58:44,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943787145] [2022-03-03 19:58:44,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:44,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:58:44,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:58:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:58:44,395 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:44,960 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-03 19:58:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:58:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-03-03 19:58:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:44,969 INFO L225 Difference]: With dead ends: 4348 [2022-03-03 19:58:44,969 INFO L226 Difference]: Without dead ends: 4344 [2022-03-03 19:58:44,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:58:44,970 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 402 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:44,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 166 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-03 19:58:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-03 19:58:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 19:58:45,023 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 19:58:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:45,023 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 19:58:45,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:45,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 19:58:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:45,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:45,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:45,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:45,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:45,244 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:45,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-03-03 19:58:45,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:45,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935190064] [2022-03-03 19:58:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:45,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:45,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:45,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935190064] [2022-03-03 19:58:45,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935190064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:45,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145700367] [2022-03-03 19:58:45,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:45,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:45,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:45,298 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:58:45,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:45,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:45,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:45,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145700367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:45,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:45,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:58:45,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117739542] [2022-03-03 19:58:45,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:45,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:58:45,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:58:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:58:45,520 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:46,158 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-03 19:58:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:58:46,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:46,165 INFO L225 Difference]: With dead ends: 4035 [2022-03-03 19:58:46,165 INFO L226 Difference]: Without dead ends: 4035 [2022-03-03 19:58:46,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:58:46,166 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 437 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:46,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 239 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-03 19:58:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-03 19:58:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-03 19:58:46,206 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-03 19:58:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:46,206 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-03 19:58:46,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-03 19:58:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:46,208 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:46,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:46,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-03 19:58:46,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:46,409 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:46,409 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-03-03 19:58:46,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:46,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209484973] [2022-03-03 19:58:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:46,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:46,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:46,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209484973] [2022-03-03 19:58:46,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209484973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:46,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461618146] [2022-03-03 19:58:46,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:46,469 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:46,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:58:46,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:58:46,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:46,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:46,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:46,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461618146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:46,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:46,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:58:46,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478849788] [2022-03-03 19:58:46,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:46,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:58:46,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:58:46,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:58:46,655 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:47,408 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-03 19:58:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:58:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:47,420 INFO L225 Difference]: With dead ends: 3794 [2022-03-03 19:58:47,420 INFO L226 Difference]: Without dead ends: 3790 [2022-03-03 19:58:47,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:58:47,421 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 433 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:47,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 168 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-03 19:58:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-03 19:58:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 19:58:47,457 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 19:58:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:47,457 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 19:58:47,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 19:58:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:47,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:47,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:47,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 19:58:47,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-03 19:58:47,660 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-03-03 19:58:47,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:47,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807002190] [2022-03-03 19:58:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:47,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:47,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807002190] [2022-03-03 19:58:47,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807002190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:47,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926299835] [2022-03-03 19:58:47,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:47,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:47,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:47,701 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:47,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:58:47,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:47,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:47,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:47,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:47,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926299835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:47,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:47,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:58:47,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008763891] [2022-03-03 19:58:47,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:47,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:58:47,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:47,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:58:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:58:47,857 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 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) [2022-03-03 19:58:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:48,489 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-03 19:58:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:58:48,490 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 24 [2022-03-03 19:58:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:48,497 INFO L225 Difference]: With dead ends: 3978 [2022-03-03 19:58:48,497 INFO L226 Difference]: Without dead ends: 3978 [2022-03-03 19:58:48,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:58:48,498 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 285 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:48,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 162 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-03 19:58:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-03 19:58:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-03 19:58:48,533 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-03 19:58:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:48,533 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-03 19:58:48,533 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) [2022-03-03 19:58:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-03 19:58:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:48,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:48,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:48,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 19:58:48,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:48,737 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-03-03 19:58:48,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:48,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690935207] [2022-03-03 19:58:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:48,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:48,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690935207] [2022-03-03 19:58:48,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690935207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:48,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652267705] [2022-03-03 19:58:48,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:48,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:48,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:48,792 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:48,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:58:48,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:58:48,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:48,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:48,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:48,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652267705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:48,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:48,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:58:48,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340343140] [2022-03-03 19:58:48,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:48,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:58:48,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:58:48,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:58:48,934 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 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) [2022-03-03 19:58:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:49,448 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-03 19:58:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:58:49,449 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 24 [2022-03-03 19:58:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:49,456 INFO L225 Difference]: With dead ends: 3706 [2022-03-03 19:58:49,456 INFO L226 Difference]: Without dead ends: 3702 [2022-03-03 19:58:49,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:58:49,456 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:49,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 149 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-03 19:58:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-03 19:58:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-03 19:58:49,496 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-03 19:58:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:49,496 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-03 19:58:49,496 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) [2022-03-03 19:58:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-03 19:58:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:49,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:49,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:49,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:49,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:49,723 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-03-03 19:58:49,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:49,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103570577] [2022-03-03 19:58:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:49,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:49,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103570577] [2022-03-03 19:58:49,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103570577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:49,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569171352] [2022-03-03 19:58:49,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:49,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:49,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:49,764 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:49,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:58:49,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:58:49,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:49,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:49,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:49,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569171352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:49,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:49,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:58:49,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309770911] [2022-03-03 19:58:49,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:49,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:58:49,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:58:49,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:58:49,910 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 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) [2022-03-03 19:58:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:50,497 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-03 19:58:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:58:50,497 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 24 [2022-03-03 19:58:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:50,504 INFO L225 Difference]: With dead ends: 4114 [2022-03-03 19:58:50,504 INFO L226 Difference]: Without dead ends: 4102 [2022-03-03 19:58:50,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:58:50,505 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:50,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 195 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:50,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-03 19:58:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-03 19:58:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-03 19:58:50,546 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-03 19:58:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:50,547 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-03 19:58:50,547 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) [2022-03-03 19:58:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-03 19:58:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:50,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:50,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:50,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:50,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-03 19:58:50,774 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-03-03 19:58:50,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:50,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937516779] [2022-03-03 19:58:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:50,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:50,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937516779] [2022-03-03 19:58:50,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937516779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:50,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230829407] [2022-03-03 19:58:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:50,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:50,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:50,830 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:50,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:58:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:50,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:50,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:51,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230829407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:51,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:51,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:58:51,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332363273] [2022-03-03 19:58:51,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:51,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:58:51,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:51,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:58:51,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:58:51,055 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:51,690 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-03 19:58:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:58:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:51,697 INFO L225 Difference]: With dead ends: 3694 [2022-03-03 19:58:51,697 INFO L226 Difference]: Without dead ends: 3694 [2022-03-03 19:58:51,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:58:51,698 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 321 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:51,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 297 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-03 19:58:51,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-03 19:58:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-03 19:58:51,739 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-03 19:58:51,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:51,739 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-03 19:58:51,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:51,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-03 19:58:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:51,743 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:51,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:51,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-03 19:58:51,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:58:51,953 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-03-03 19:58:51,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:51,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054028319] [2022-03-03 19:58:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:52,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:52,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054028319] [2022-03-03 19:58:52,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054028319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:52,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549955067] [2022-03-03 19:58:52,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:52,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:52,006 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:52,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:58:52,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:52,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:52,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:52,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:52,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549955067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:52,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:52,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:58:52,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873012505] [2022-03-03 19:58:52,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:52,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:58:52,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:52,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:58:52,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:58:52,209 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:53,040 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-03 19:58:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:58:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:58:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:53,047 INFO L225 Difference]: With dead ends: 3420 [2022-03-03 19:58:53,047 INFO L226 Difference]: Without dead ends: 3416 [2022-03-03 19:58:53,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:58:53,048 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 358 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:53,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 222 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-03 19:58:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-03 19:58:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-03 19:58:53,086 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-03 19:58:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-03 19:58:53,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-03 19:58:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:58:53,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:53,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:53,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 19:58:53,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:58:53,290 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-03-03 19:58:53,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:53,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490486279] [2022-03-03 19:58:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:53,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:53,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:53,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490486279] [2022-03-03 19:58:53,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490486279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:53,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874566300] [2022-03-03 19:58:53,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:53,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:53,339 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:53,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:58:53,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:58:53,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:58:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:53,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:53,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874566300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:53,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:53,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:58:53,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818645639] [2022-03-03 19:58:53,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:53,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:58:53,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:53,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:58:53,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:58:53,531 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) 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) [2022-03-03 19:58:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:54,174 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-03 19:58:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:58:54,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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 24 [2022-03-03 19:58:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:54,179 INFO L225 Difference]: With dead ends: 3256 [2022-03-03 19:58:54,179 INFO L226 Difference]: Without dead ends: 3244 [2022-03-03 19:58:54,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:58:54,180 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:54,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 211 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-03 19:58:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-03 19:58:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-03 19:58:54,213 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-03 19:58:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:54,214 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-03 19:58:54,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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) [2022-03-03 19:58:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-03 19:58:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:58:54,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:54,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:54,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 19:58:54,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:58:54,417 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:54,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-03-03 19:58:54,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:54,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209367575] [2022-03-03 19:58:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:54,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:54,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209367575] [2022-03-03 19:58:54,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209367575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:54,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662065043] [2022-03-03 19:58:54,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:54,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:54,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:54,717 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:54,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:58:54,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:58:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:55,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:55,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 19:58:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:55,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:56,045 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:58:56,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 19:58:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:57,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662065043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:57,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:57,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 19:58:57,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965353390] [2022-03-03 19:58:57,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:57,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:58:57,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:58:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:58:57,294 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:02,015 INFO L93 Difference]: Finished difference Result 3630 states and 11850 transitions. [2022-03-03 19:59:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:59:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 19:59:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:02,022 INFO L225 Difference]: With dead ends: 3630 [2022-03-03 19:59:02,023 INFO L226 Difference]: Without dead ends: 3585 [2022-03-03 19:59:02,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:59:02,023 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 337 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:02,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 355 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1912 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:59:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2022-03-03 19:59:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 1767. [2022-03-03 19:59:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 3.5781426953567386) internal successors, (6319), 1766 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6319 transitions. [2022-03-03 19:59:02,061 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6319 transitions. Word has length 26 [2022-03-03 19:59:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:02,061 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 6319 transitions. [2022-03-03 19:59:02,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6319 transitions. [2022-03-03 19:59:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:59:02,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:02,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:59:02,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-03 19:59:02,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:59:02,266 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-03-03 19:59:02,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:02,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759307691] [2022-03-03 19:59:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:02,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:02,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:02,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759307691] [2022-03-03 19:59:02,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759307691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:02,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377577910] [2022-03-03 19:59:02,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:59:02,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:02,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:02,694 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:02,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:59:02,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:59:02,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:59:02,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:59:02,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:03,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:03,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:03,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 19:59:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:03,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:59:03,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:03,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:03,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 19:59:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:05,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377577910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:59:05,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:59:05,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:59:05,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367425727] [2022-03-03 19:59:05,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:59:05,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:59:05,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:59:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:59:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:59:05,279 INFO L87 Difference]: Start difference. First operand 1767 states and 6319 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:09,977 INFO L93 Difference]: Finished difference Result 4229 states and 13510 transitions. [2022-03-03 19:59:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:59:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) 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 26 [2022-03-03 19:59:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:09,985 INFO L225 Difference]: With dead ends: 4229 [2022-03-03 19:59:09,986 INFO L226 Difference]: Without dead ends: 4199 [2022-03-03 19:59:09,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:59:09,987 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 526 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:09,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 419 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1469 Invalid, 0 Unknown, 189 Unchecked, 0.9s Time] [2022-03-03 19:59:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2022-03-03 19:59:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 1886. [2022-03-03 19:59:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.5782493368700266) internal successors, (6745), 1885 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6745 transitions. [2022-03-03 19:59:10,047 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6745 transitions. Word has length 26 [2022-03-03 19:59:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:10,047 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 6745 transitions. [2022-03-03 19:59:10,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6745 transitions. [2022-03-03 19:59:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:59:10,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:10,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:59:10,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-03 19:59:10,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-03 19:59:10,252 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-03-03 19:59:10,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:10,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349961161] [2022-03-03 19:59:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:10,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:10,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:10,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349961161] [2022-03-03 19:59:10,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349961161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:10,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548647186] [2022-03-03 19:59:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:59:10,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:10,749 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:10,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:59:10,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:59:10,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:59:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:59:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:11,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:11,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:11,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:11,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 19:59:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:11,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:59:12,033 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:59:12,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 19:59:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:12,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548647186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:59:12,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:59:12,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 19:59:12,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064059031] [2022-03-03 19:59:12,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:59:12,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:59:12,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:59:12,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:59:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:59:12,745 INFO L87 Difference]: Start difference. First operand 1886 states and 6745 transitions. Second operand has 25 states, 25 states have (on average 2.76) 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) [2022-03-03 19:59:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:17,465 INFO L93 Difference]: Finished difference Result 3713 states and 12473 transitions. [2022-03-03 19:59:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:59:17,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) 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 26 [2022-03-03 19:59:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:17,473 INFO L225 Difference]: With dead ends: 3713 [2022-03-03 19:59:17,473 INFO L226 Difference]: Without dead ends: 3683 [2022-03-03 19:59:17,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=944, Invalid=5062, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:59:17,474 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 368 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:17,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 303 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:59:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2022-03-03 19:59:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 1932. [2022-03-03 19:59:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.5680994303469706) internal successors, (6890), 1931 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6890 transitions. [2022-03-03 19:59:17,532 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6890 transitions. Word has length 26 [2022-03-03 19:59:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:17,532 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 6890 transitions. [2022-03-03 19:59:17,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) 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) [2022-03-03 19:59:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6890 transitions. [2022-03-03 19:59:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:59:17,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:17,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:59:17,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-03 19:59:17,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-03 19:59:17,751 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 6 times [2022-03-03 19:59:17,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:17,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763172802] [2022-03-03 19:59:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:17,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:18,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:18,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763172802] [2022-03-03 19:59:18,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763172802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:18,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406411981] [2022-03-03 19:59:18,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:59:18,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:18,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:18,148 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:18,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:59:18,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:59:18,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:59:18,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:59:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:18,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:18,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:18,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 19:59:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:19,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:59:19,670 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:59:19,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 19:59:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:21,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406411981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:59:21,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:59:21,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 19:59:21,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968114870] [2022-03-03 19:59:21,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:59:21,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:59:21,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:59:21,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:59:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:59:21,369 INFO L87 Difference]: Start difference. First operand 1932 states and 6890 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:29,885 INFO L93 Difference]: Finished difference Result 4709 states and 15013 transitions. [2022-03-03 19:59:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 19:59:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 19:59:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:29,896 INFO L225 Difference]: With dead ends: 4709 [2022-03-03 19:59:29,896 INFO L226 Difference]: Without dead ends: 4649 [2022-03-03 19:59:29,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3594 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1405, Invalid=9101, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:59:29,897 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 658 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:29,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 496 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:59:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2022-03-03 19:59:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 1975. [2022-03-03 19:59:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.563323201621074) internal successors, (7034), 1974 states have internal predecessors, (7034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 7034 transitions. [2022-03-03 19:59:29,949 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 7034 transitions. Word has length 26 [2022-03-03 19:59:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:29,949 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 7034 transitions. [2022-03-03 19:59:29,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 7034 transitions. [2022-03-03 19:59:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:59:29,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:29,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:59:29,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:59:30,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-03 19:59:30,154 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:30,155 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-03-03 19:59:30,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:30,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716321211] [2022-03-03 19:59:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:30,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:30,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:30,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716321211] [2022-03-03 19:59:30,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716321211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:30,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111644635] [2022-03-03 19:59:30,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:59:30,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:30,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:30,535 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:30,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:59:30,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:59:30,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:59:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:59:30,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:31,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:31,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:31,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:31,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 19:59:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:31,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:59:31,965 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:59:31,965 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 19:59:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:32,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111644635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:59:32,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:59:32,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 19:59:32,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58207436] [2022-03-03 19:59:32,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:59:32,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:59:32,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:59:32,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:59:32,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:59:32,545 INFO L87 Difference]: Start difference. First operand 1975 states and 7034 transitions. Second operand has 25 states, 25 states have (on average 2.76) 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) [2022-03-03 19:59:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:41,700 INFO L93 Difference]: Finished difference Result 4911 states and 16020 transitions. [2022-03-03 19:59:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 19:59:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) 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 26 [2022-03-03 19:59:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:41,710 INFO L225 Difference]: With dead ends: 4911 [2022-03-03 19:59:41,711 INFO L226 Difference]: Without dead ends: 4849 [2022-03-03 19:59:41,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5425 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2212, Invalid=12068, Unknown=0, NotChecked=0, Total=14280 [2022-03-03 19:59:41,712 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 515 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:41,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 495 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:59:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2022-03-03 19:59:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 2029. [2022-03-03 19:59:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 3.5660749506903353) internal successors, (7232), 2028 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 7232 transitions. [2022-03-03 19:59:41,784 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 7232 transitions. Word has length 26 [2022-03-03 19:59:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:41,785 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 7232 transitions. [2022-03-03 19:59:41,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) 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) [2022-03-03 19:59:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 7232 transitions. [2022-03-03 19:59:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:59:41,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:41,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:59:41,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:59:42,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:42,014 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-03-03 19:59:42,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:42,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719377119] [2022-03-03 19:59:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:42,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:42,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:42,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719377119] [2022-03-03 19:59:42,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719377119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:42,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206214510] [2022-03-03 19:59:42,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:59:42,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:42,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:42,424 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:42,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:59:42,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:59:42,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:59:42,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:59:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:42,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:42,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:42,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:42,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-03-03 19:59:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:44,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:59:44,973 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:59:44,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 19:59:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:45,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206214510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:59:45,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:59:45,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-03 19:59:45,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728103282] [2022-03-03 19:59:45,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:59:45,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:59:45,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:59:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:59:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:59:45,566 INFO L87 Difference]: Start difference. First operand 2029 states and 7232 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:08,030 INFO L93 Difference]: Finished difference Result 5780 states and 18428 transitions. [2022-03-03 20:00:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-03 20:00:08,030 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 26 [2022-03-03 20:00:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:08,041 INFO L225 Difference]: With dead ends: 5780 [2022-03-03 20:00:08,041 INFO L226 Difference]: Without dead ends: 5732 [2022-03-03 20:00:08,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18563 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=4659, Invalid=39651, Unknown=0, NotChecked=0, Total=44310 [2022-03-03 20:00:08,044 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 775 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 4598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:08,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 967 Invalid, 4598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-03 20:00:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2022-03-03 20:00:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 2120. [2022-03-03 20:00:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.561113732892874) internal successors, (7546), 2119 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7546 transitions. [2022-03-03 20:00:08,105 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7546 transitions. Word has length 26 [2022-03-03 20:00:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:08,106 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 7546 transitions. [2022-03-03 20:00:08,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7546 transitions. [2022-03-03 20:00:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:00:08,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:08,110 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:08,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-03 20:00:08,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:08,310 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 7 times [2022-03-03 20:00:08,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:08,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323025875] [2022-03-03 20:00:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:08,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:08,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:08,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323025875] [2022-03-03 20:00:08,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323025875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:08,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659173368] [2022-03-03 20:00:08,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:00:08,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:08,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:08,709 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:08,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 20:00:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:08,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:00:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:09,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:09,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:00:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:09,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:09,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:09,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:00:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:11,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659173368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:11,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:11,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:00:11,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491129078] [2022-03-03 20:00:11,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:11,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:00:11,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:00:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:00:11,319 INFO L87 Difference]: Start difference. First operand 2120 states and 7546 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:15,232 INFO L93 Difference]: Finished difference Result 4433 states and 14344 transitions. [2022-03-03 20:00:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 20:00:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) 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 26 [2022-03-03 20:00:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:15,241 INFO L225 Difference]: With dead ends: 4433 [2022-03-03 20:00:15,241 INFO L226 Difference]: Without dead ends: 4403 [2022-03-03 20:00:15,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:00:15,242 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 528 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:15,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 365 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1243 Invalid, 0 Unknown, 109 Unchecked, 0.8s Time] [2022-03-03 20:00:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2022-03-03 20:00:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 2143. [2022-03-03 20:00:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.5597572362278243) internal successors, (7625), 2142 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7625 transitions. [2022-03-03 20:00:15,295 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7625 transitions. Word has length 26 [2022-03-03 20:00:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:15,295 INFO L470 AbstractCegarLoop]: Abstraction has 2143 states and 7625 transitions. [2022-03-03 20:00:15,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7625 transitions. [2022-03-03 20:00:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:00:15,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:15,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:15,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-03 20:00:15,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-03 20:00:15,500 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2045752042, now seen corresponding path program 8 times [2022-03-03 20:00:15,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:15,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818131994] [2022-03-03 20:00:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:15,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:15,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:15,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818131994] [2022-03-03 20:00:15,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818131994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:15,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822037169] [2022-03-03 20:00:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:00:15,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:15,912 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:15,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 20:00:15,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:00:15,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:00:15,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:16,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:16,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:16,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:00:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:16,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:17,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:17,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:17,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:17,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-03 20:00:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:18,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822037169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:18,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:18,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:00:18,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013767133] [2022-03-03 20:00:18,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:18,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:00:18,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:18,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:00:18,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:00:18,403 INFO L87 Difference]: Start difference. First operand 2143 states and 7625 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:24,436 INFO L93 Difference]: Finished difference Result 4236 states and 13996 transitions. [2022-03-03 20:00:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 20:00:24,437 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:00:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:24,445 INFO L225 Difference]: With dead ends: 4236 [2022-03-03 20:00:24,446 INFO L226 Difference]: Without dead ends: 4194 [2022-03-03 20:00:24,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=972, Invalid=4880, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 20:00:24,447 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 627 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:24,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 332 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1239 Invalid, 0 Unknown, 393 Unchecked, 0.8s Time] [2022-03-03 20:00:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2022-03-03 20:00:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2189. [2022-03-03 20:00:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.5626142595978063) internal successors, (7795), 2188 states have internal predecessors, (7795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7795 transitions. [2022-03-03 20:00:24,496 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7795 transitions. Word has length 26 [2022-03-03 20:00:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:24,496 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 7795 transitions. [2022-03-03 20:00:24,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7795 transitions. [2022-03-03 20:00:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:00:24,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:24,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:24,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 20:00:24,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 20:00:24,700 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 9 times [2022-03-03 20:00:24,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:24,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55772751] [2022-03-03 20:00:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:25,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:25,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55772751] [2022-03-03 20:00:25,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55772751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:25,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548345688] [2022-03-03 20:00:25,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:00:25,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:25,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:25,008 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:25,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 20:00:25,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:00:25,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:00:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:25,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:25,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:25,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:00:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:26,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:26,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:26,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-03-03 20:00:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:31,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548345688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:31,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:31,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:00:31,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879329758] [2022-03-03 20:00:31,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:31,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:00:31,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:00:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:00:31,634 INFO L87 Difference]: Start difference. First operand 2189 states and 7795 transitions. Second operand has 24 states, 24 states have (on average 2.5) 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) [2022-03-03 20:00:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:35,483 INFO L93 Difference]: Finished difference Result 6394 states and 21490 transitions. [2022-03-03 20:00:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 20:00:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) 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 26 [2022-03-03 20:00:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:35,497 INFO L225 Difference]: With dead ends: 6394 [2022-03-03 20:00:35,497 INFO L226 Difference]: Without dead ends: 6334 [2022-03-03 20:00:35,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=954, Invalid=4016, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 20:00:35,498 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 568 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:35,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 278 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 620 Invalid, 0 Unknown, 535 Unchecked, 0.5s Time] [2022-03-03 20:00:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2022-03-03 20:00:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 2293. [2022-03-03 20:00:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.5715532286212914) internal successors, (8186), 2292 states have internal predecessors, (8186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 8186 transitions. [2022-03-03 20:00:35,566 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 8186 transitions. Word has length 26 [2022-03-03 20:00:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:35,566 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 8186 transitions. [2022-03-03 20:00:35,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) 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) [2022-03-03 20:00:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 8186 transitions. [2022-03-03 20:00:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:00:35,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:35,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:35,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 20:00:35,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-03 20:00:35,792 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:35,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1828243580, now seen corresponding path program 10 times [2022-03-03 20:00:35,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:35,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270347542] [2022-03-03 20:00:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:35,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:36,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:36,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270347542] [2022-03-03 20:00:36,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270347542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:36,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853468807] [2022-03-03 20:00:36,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:00:36,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:36,049 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:36,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 20:00:36,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:00:36,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:36,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:00:36,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:36,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:36,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:00:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:36,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:37,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:37,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:37,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:00:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:38,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853468807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:38,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:38,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:00:38,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247937116] [2022-03-03 20:00:38,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:38,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:00:38,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:00:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:00:38,368 INFO L87 Difference]: Start difference. First operand 2293 states and 8186 transitions. Second operand has 24 states, 24 states have (on average 2.5) 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) [2022-03-03 20:00:42,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:42,816 INFO L93 Difference]: Finished difference Result 5104 states and 16501 transitions. [2022-03-03 20:00:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:00:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) 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 26 [2022-03-03 20:00:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:42,827 INFO L225 Difference]: With dead ends: 5104 [2022-03-03 20:00:42,827 INFO L226 Difference]: Without dead ends: 5059 [2022-03-03 20:00:42,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=871, Invalid=3551, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 20:00:42,827 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 578 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:42,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 341 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:00:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2022-03-03 20:00:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 2237. [2022-03-03 20:00:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.57871198568873) internal successors, (8002), 2236 states have internal predecessors, (8002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 8002 transitions. [2022-03-03 20:00:42,888 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 8002 transitions. Word has length 26 [2022-03-03 20:00:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:42,888 INFO L470 AbstractCegarLoop]: Abstraction has 2237 states and 8002 transitions. [2022-03-03 20:00:42,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) 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) [2022-03-03 20:00:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 8002 transitions. [2022-03-03 20:00:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:00:42,893 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:42,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:42,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-03 20:00:43,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:43,094 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 11 times [2022-03-03 20:00:43,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:43,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615463668] [2022-03-03 20:00:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:43,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:43,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:43,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615463668] [2022-03-03 20:00:43,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615463668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:43,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599346008] [2022-03-03 20:00:43,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:00:43,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:43,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:43,360 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:43,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 20:00:43,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:00:43,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:43,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:00:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:43,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:43,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:43,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:00:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:44,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:44,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:44,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:00:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:46,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599346008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:46,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:46,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:00:46,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371647587] [2022-03-03 20:00:46,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:46,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:00:46,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:00:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:00:46,195 INFO L87 Difference]: Start difference. First operand 2237 states and 8002 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:00,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:00,478 INFO L93 Difference]: Finished difference Result 6858 states and 21900 transitions. [2022-03-03 20:01:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-03 20:01:00,479 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-03-03 20:01:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:00,491 INFO L225 Difference]: With dead ends: 6858 [2022-03-03 20:01:00,491 INFO L226 Difference]: Without dead ends: 6769 [2022-03-03 20:01:00,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6061 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=2770, Invalid=13742, Unknown=0, NotChecked=0, Total=16512 [2022-03-03 20:01:00,493 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 877 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 2748 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:00,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 675 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2748 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 20:01:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2022-03-03 20:01:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 2312. [2022-03-03 20:01:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 3.6057983556901774) internal successors, (8333), 2311 states have internal predecessors, (8333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 8333 transitions. [2022-03-03 20:01:00,578 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 8333 transitions. Word has length 26 [2022-03-03 20:01:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:00,578 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 8333 transitions. [2022-03-03 20:01:00,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 8333 transitions. [2022-03-03 20:01:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:01:00,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:00,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:00,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 20:01:00,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 20:01:00,782 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 12 times [2022-03-03 20:01:00,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:00,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213083140] [2022-03-03 20:01:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:00,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:01,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:01,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213083140] [2022-03-03 20:01:01,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213083140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:01,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702443828] [2022-03-03 20:01:01,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:01:01,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:01,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:01,090 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:01,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 20:01:01,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:01:01,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:01:01,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:01:01,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:01,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:01:01,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:01,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:01:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:01,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:02,441 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:01:02,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:01:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:03,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702443828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:03,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:03,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:01:03,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822249382] [2022-03-03 20:01:03,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:03,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:01:03,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:03,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:01:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:01:03,440 INFO L87 Difference]: Start difference. First operand 2312 states and 8333 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:10,785 INFO L93 Difference]: Finished difference Result 4834 states and 15890 transitions. [2022-03-03 20:01:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 20:01:10,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 20:01:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:10,794 INFO L225 Difference]: With dead ends: 4834 [2022-03-03 20:01:10,795 INFO L226 Difference]: Without dead ends: 4789 [2022-03-03 20:01:10,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1242, Invalid=7314, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 20:01:10,795 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 406 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:10,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 622 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2841 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 20:01:10,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2022-03-03 20:01:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 2314. [2022-03-03 20:01:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.610030263726762) internal successors, (8350), 2313 states have internal predecessors, (8350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 8350 transitions. [2022-03-03 20:01:10,848 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 8350 transitions. Word has length 26 [2022-03-03 20:01:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:10,849 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 8350 transitions. [2022-03-03 20:01:10,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 8350 transitions. [2022-03-03 20:01:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:01:10,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:10,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:10,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-03 20:01:11,058 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 [2022-03-03 20:01:11,059 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash 555566964, now seen corresponding path program 13 times [2022-03-03 20:01:11,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:11,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646840665] [2022-03-03 20:01:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:11,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:11,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646840665] [2022-03-03 20:01:11,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646840665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:11,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416122284] [2022-03-03 20:01:11,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:01:11,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:11,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:11,354 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:11,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 20:01:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:01:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:01:11,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:11,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:11,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 83 [2022-03-03 20:01:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:12,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:12,888 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:01:12,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:01:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:14,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416122284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:14,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:14,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:01:14,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17471798] [2022-03-03 20:01:14,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:14,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:01:14,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:01:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:01:14,234 INFO L87 Difference]: Start difference. First operand 2314 states and 8350 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:20,793 INFO L93 Difference]: Finished difference Result 4771 states and 15740 transitions. [2022-03-03 20:01:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 20:01:20,793 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 20:01:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:20,802 INFO L225 Difference]: With dead ends: 4771 [2022-03-03 20:01:20,802 INFO L226 Difference]: Without dead ends: 4711 [2022-03-03 20:01:20,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2745 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1116, Invalid=7440, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 20:01:20,804 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 378 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:20,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 409 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:01:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2022-03-03 20:01:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 2352. [2022-03-03 20:01:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.5997447894512975) internal successors, (8463), 2351 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8463 transitions. [2022-03-03 20:01:20,872 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8463 transitions. Word has length 26 [2022-03-03 20:01:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:20,872 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 8463 transitions. [2022-03-03 20:01:20,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8463 transitions. [2022-03-03 20:01:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:01:20,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:20,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:20,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-03 20:01:21,078 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 [2022-03-03 20:01:21,078 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash -496512208, now seen corresponding path program 14 times [2022-03-03 20:01:21,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:21,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255373109] [2022-03-03 20:01:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:21,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:21,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255373109] [2022-03-03 20:01:21,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255373109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:21,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826133036] [2022-03-03 20:01:21,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:01:21,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:21,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:21,448 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:21,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 20:01:21,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:01:21,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:01:21,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:01:21,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:22,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:22,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:01:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:22,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:23,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:23,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:23,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-03 20:01:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:24,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826133036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:24,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:24,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:01:24,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105281811] [2022-03-03 20:01:24,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:24,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:01:24,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:01:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:01:24,294 INFO L87 Difference]: Start difference. First operand 2352 states and 8463 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:30,327 INFO L93 Difference]: Finished difference Result 4575 states and 15177 transitions. [2022-03-03 20:01:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 20:01:30,328 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 26 [2022-03-03 20:01:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:30,336 INFO L225 Difference]: With dead ends: 4575 [2022-03-03 20:01:30,337 INFO L226 Difference]: Without dead ends: 4539 [2022-03-03 20:01:30,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=979, Invalid=4721, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 20:01:30,337 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 542 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:30,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 374 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1428 Invalid, 0 Unknown, 282 Unchecked, 0.9s Time] [2022-03-03 20:01:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4539 states. [2022-03-03 20:01:30,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4539 to 2340. [2022-03-03 20:01:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 3.6041043180846515) internal successors, (8430), 2339 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 8430 transitions. [2022-03-03 20:01:30,393 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 8430 transitions. Word has length 26 [2022-03-03 20:01:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:30,393 INFO L470 AbstractCegarLoop]: Abstraction has 2340 states and 8430 transitions. [2022-03-03 20:01:30,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 8430 transitions. [2022-03-03 20:01:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:01:30,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:30,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:30,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-03 20:01:30,597 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 [2022-03-03 20:01:30,597 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:30,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1636584436, now seen corresponding path program 15 times [2022-03-03 20:01:30,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:30,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793092232] [2022-03-03 20:01:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:30,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:31,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:31,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793092232] [2022-03-03 20:01:31,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793092232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:31,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456959873] [2022-03-03 20:01:31,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:01:31,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:31,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:31,012 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:31,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 20:01:31,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:01:31,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:01:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:01:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:31,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:31,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:01:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:32,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:32,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:32,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:33,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:33,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-03 20:01:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:33,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456959873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:33,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:33,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:01:33,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150241506] [2022-03-03 20:01:33,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:33,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:01:33,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:33,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:01:33,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:01:33,824 INFO L87 Difference]: Start difference. First operand 2340 states and 8430 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:39,344 INFO L93 Difference]: Finished difference Result 4881 states and 16181 transitions. [2022-03-03 20:01:39,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 20:01:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 26 [2022-03-03 20:01:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:39,354 INFO L225 Difference]: With dead ends: 4881 [2022-03-03 20:01:39,354 INFO L226 Difference]: Without dead ends: 4865 [2022-03-03 20:01:39,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=980, Invalid=5182, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 20:01:39,355 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 613 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:39,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 346 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1473 Invalid, 0 Unknown, 189 Unchecked, 0.9s Time] [2022-03-03 20:01:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2022-03-03 20:01:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 2322. [2022-03-03 20:01:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 3.6092201637225334) internal successors, (8377), 2321 states have internal predecessors, (8377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 8377 transitions. [2022-03-03 20:01:39,417 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 8377 transitions. Word has length 26 [2022-03-03 20:01:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:39,417 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 8377 transitions. [2022-03-03 20:01:39,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 8377 transitions. [2022-03-03 20:01:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:01:39,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:39,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:39,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-03 20:01:39,622 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 [2022-03-03 20:01:39,623 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:39,623 INFO L85 PathProgramCache]: Analyzing trace with hash -871001100, now seen corresponding path program 16 times [2022-03-03 20:01:39,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:39,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552047516] [2022-03-03 20:01:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:39,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:39,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:39,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552047516] [2022-03-03 20:01:39,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552047516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:39,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066261560] [2022-03-03 20:01:39,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:01:39,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:39,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:39,964 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:39,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 20:01:39,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:01:39,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:01:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:01:39,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:01:40,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:40,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:01:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:40,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:41,438 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:01:41,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:01:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:43,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066261560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:43,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:43,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:01:43,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328234831] [2022-03-03 20:01:43,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:43,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:01:43,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:01:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:01:43,244 INFO L87 Difference]: Start difference. First operand 2322 states and 8377 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:49,011 INFO L93 Difference]: Finished difference Result 4731 states and 15686 transitions. [2022-03-03 20:01:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:01:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 20:01:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:49,021 INFO L225 Difference]: With dead ends: 4731 [2022-03-03 20:01:49,021 INFO L226 Difference]: Without dead ends: 4686 [2022-03-03 20:01:49,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=949, Invalid=5531, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 20:01:49,022 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 364 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:49,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 489 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:01:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-03-03 20:01:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 2324. [2022-03-03 20:01:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 3.610848041325872) internal successors, (8388), 2323 states have internal predecessors, (8388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 8388 transitions. [2022-03-03 20:01:49,076 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 8388 transitions. Word has length 26 [2022-03-03 20:01:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:49,076 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 8388 transitions. [2022-03-03 20:01:49,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 8388 transitions. [2022-03-03 20:01:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:01:49,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:49,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:49,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-03 20:01:49,281 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 [2022-03-03 20:01:49,281 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 17 times [2022-03-03 20:01:49,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:49,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805823386] [2022-03-03 20:01:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:49,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:49,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:49,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805823386] [2022-03-03 20:01:49,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805823386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:49,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224964622] [2022-03-03 20:01:49,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:01:49,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:49,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:49,515 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:49,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 20:01:49,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:01:49,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:01:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:01:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:50,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:01:50,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:50,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:01:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:50,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:50,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:50,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:01:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:52,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224964622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:52,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:52,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:01:52,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521232953] [2022-03-03 20:01:52,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:52,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:01:52,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:01:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:01:52,222 INFO L87 Difference]: Start difference. First operand 2324 states and 8388 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:04,448 INFO L93 Difference]: Finished difference Result 6055 states and 18996 transitions. [2022-03-03 20:02:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-03 20:02:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 26 [2022-03-03 20:02:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:04,459 INFO L225 Difference]: With dead ends: 6055 [2022-03-03 20:02:04,459 INFO L226 Difference]: Without dead ends: 5869 [2022-03-03 20:02:04,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5847 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2167, Invalid=14089, Unknown=0, NotChecked=0, Total=16256 [2022-03-03 20:02:04,461 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 652 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:04,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 553 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 20:02:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5869 states. [2022-03-03 20:02:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 2499. [2022-03-03 20:02:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 3.610888710968775) internal successors, (9020), 2498 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 9020 transitions. [2022-03-03 20:02:04,521 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 9020 transitions. Word has length 26 [2022-03-03 20:02:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:04,522 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 9020 transitions. [2022-03-03 20:02:04,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 9020 transitions. [2022-03-03 20:02:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:02:04,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:04,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:04,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-03 20:02:04,726 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 [2022-03-03 20:02:04,727 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 18 times [2022-03-03 20:02:04,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:04,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137014355] [2022-03-03 20:02:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:04,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:04,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:04,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137014355] [2022-03-03 20:02:04,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137014355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:04,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105295721] [2022-03-03 20:02:04,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:02:04,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:04,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:04,947 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:04,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 20:02:05,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:02:05,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:02:05,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:05,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:05,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:02:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:05,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:06,322 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:02:06,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:02:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:08,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105295721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:08,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:08,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:02:08,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142223889] [2022-03-03 20:02:08,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:08,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:02:08,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:02:08,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:02:08,107 INFO L87 Difference]: Start difference. First operand 2499 states and 9020 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:16,322 INFO L93 Difference]: Finished difference Result 5599 states and 18252 transitions. [2022-03-03 20:02:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 20:02:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 20:02:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:16,333 INFO L225 Difference]: With dead ends: 5599 [2022-03-03 20:02:16,333 INFO L226 Difference]: Without dead ends: 5493 [2022-03-03 20:02:16,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2767 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1258, Invalid=7114, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 20:02:16,333 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 451 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:16,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 447 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:02:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2022-03-03 20:02:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 2534. [2022-03-03 20:02:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 3.603237268061587) internal successors, (9127), 2533 states have internal predecessors, (9127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 9127 transitions. [2022-03-03 20:02:16,397 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 9127 transitions. Word has length 26 [2022-03-03 20:02:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:16,397 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 9127 transitions. [2022-03-03 20:02:16,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 9127 transitions. [2022-03-03 20:02:16,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:02:16,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:16,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:16,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 20:02:16,602 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 [2022-03-03 20:02:16,602 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:16,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:16,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 19 times [2022-03-03 20:02:16,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:16,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845209288] [2022-03-03 20:02:16,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:16,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:16,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:16,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845209288] [2022-03-03 20:02:16,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845209288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:16,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809532753] [2022-03-03 20:02:16,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:02:16,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:16,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:16,876 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:16,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 20:02:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:02:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:17,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:17,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:17,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:02:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:17,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:18,186 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:02:18,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 157 [2022-03-03 20:02:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:20,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809532753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:20,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:20,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 20:02:20,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663380256] [2022-03-03 20:02:20,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:20,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 20:02:20,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 20:02:20,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:02:20,654 INFO L87 Difference]: Start difference. First operand 2534 states and 9127 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:22,437 INFO L93 Difference]: Finished difference Result 3814 states and 12781 transitions. [2022-03-03 20:02:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:02:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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 26 [2022-03-03 20:02:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:22,445 INFO L225 Difference]: With dead ends: 3814 [2022-03-03 20:02:22,445 INFO L226 Difference]: Without dead ends: 3777 [2022-03-03 20:02:22,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=240, Invalid=1320, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:02:22,446 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:22,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 283 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1135 Invalid, 0 Unknown, 69 Unchecked, 0.6s Time] [2022-03-03 20:02:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2022-03-03 20:02:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 2550. [2022-03-03 20:02:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.6002353864260495) internal successors, (9177), 2549 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 9177 transitions. [2022-03-03 20:02:22,496 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 9177 transitions. Word has length 26 [2022-03-03 20:02:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:22,496 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 9177 transitions. [2022-03-03 20:02:22,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 9177 transitions. [2022-03-03 20:02:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:02:22,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:22,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:22,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 20:02:22,700 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 [2022-03-03 20:02:22,701 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1269624816, now seen corresponding path program 20 times [2022-03-03 20:02:22,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:22,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470471972] [2022-03-03 20:02:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:22,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:22,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:22,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470471972] [2022-03-03 20:02:22,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470471972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:22,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425925638] [2022-03-03 20:02:22,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:02:22,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:22,924 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:22,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 20:02:22,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:02:22,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:22,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:02:22,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:23,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:23,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:23,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:02:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:23,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:24,372 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:02:24,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 157 [2022-03-03 20:02:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:26,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425925638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:26,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:26,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:02:26,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951349871] [2022-03-03 20:02:26,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:26,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:02:26,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:26,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:02:26,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:02:26,681 INFO L87 Difference]: Start difference. First operand 2550 states and 9177 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:33,110 INFO L93 Difference]: Finished difference Result 5343 states and 17520 transitions. [2022-03-03 20:02:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 20:02:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 20:02:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:33,125 INFO L225 Difference]: With dead ends: 5343 [2022-03-03 20:02:33,126 INFO L226 Difference]: Without dead ends: 5210 [2022-03-03 20:02:33,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1009, Invalid=5963, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 20:02:33,126 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 399 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:33,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 462 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:02:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2022-03-03 20:02:33,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 2575. [2022-03-03 20:02:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2574 states have (on average 3.604118104118104) internal successors, (9277), 2574 states have internal predecessors, (9277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 9277 transitions. [2022-03-03 20:02:33,186 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 9277 transitions. Word has length 26 [2022-03-03 20:02:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:33,186 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 9277 transitions. [2022-03-03 20:02:33,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 9277 transitions. [2022-03-03 20:02:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:02:33,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:33,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:33,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-03 20:02:33,391 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 [2022-03-03 20:02:33,391 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 21 times [2022-03-03 20:02:33,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:33,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051963658] [2022-03-03 20:02:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:33,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:33,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:33,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051963658] [2022-03-03 20:02:33,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051963658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:33,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178528015] [2022-03-03 20:02:33,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:02:33,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:33,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:33,759 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:33,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 20:02:33,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:02:33,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:33,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:02:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:34,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:34,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:34,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:02:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:34,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:35,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:35,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:35,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:02:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:38,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178528015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:38,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:38,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:02:38,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365772160] [2022-03-03 20:02:38,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:38,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:02:38,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:02:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:02:38,098 INFO L87 Difference]: Start difference. First operand 2575 states and 9277 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:40,755 INFO L93 Difference]: Finished difference Result 4588 states and 15324 transitions. [2022-03-03 20:02:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:02:40,756 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) 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 26 [2022-03-03 20:02:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:40,765 INFO L225 Difference]: With dead ends: 4588 [2022-03-03 20:02:40,765 INFO L226 Difference]: Without dead ends: 4540 [2022-03-03 20:02:40,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=660, Invalid=3000, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:02:40,765 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 368 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:40,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 374 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 889 Invalid, 0 Unknown, 480 Unchecked, 0.5s Time] [2022-03-03 20:02:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2022-03-03 20:02:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 2645. [2022-03-03 20:02:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.6021180030257187) internal successors, (9524), 2644 states have internal predecessors, (9524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 9524 transitions. [2022-03-03 20:02:40,819 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 9524 transitions. Word has length 26 [2022-03-03 20:02:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:40,819 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 9524 transitions. [2022-03-03 20:02:40,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 9524 transitions. [2022-03-03 20:02:40,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:02:40,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:40,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:40,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-03 20:02:41,024 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 [2022-03-03 20:02:41,024 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:41,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash -697050812, now seen corresponding path program 22 times [2022-03-03 20:02:41,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:41,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207111317] [2022-03-03 20:02:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:41,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:41,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:41,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207111317] [2022-03-03 20:02:41,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207111317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:41,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53170357] [2022-03-03 20:02:41,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:02:41,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:41,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:41,309 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:41,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 20:02:41,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:02:41,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:41,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:02:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:41,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:41,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:41,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:02:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:42,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:43,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:43,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 173 [2022-03-03 20:02:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:47,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53170357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:47,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:47,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:02:47,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674622588] [2022-03-03 20:02:47,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:47,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:02:47,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:02:47,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:02:47,328 INFO L87 Difference]: Start difference. First operand 2645 states and 9524 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-03 20:02:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:54,385 INFO L93 Difference]: Finished difference Result 6742 states and 22347 transitions. [2022-03-03 20:02:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 20:02:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-03-03 20:02:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:54,400 INFO L225 Difference]: With dead ends: 6742 [2022-03-03 20:02:54,400 INFO L226 Difference]: Without dead ends: 6698 [2022-03-03 20:02:54,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 20:02:54,401 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 354 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:54,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 487 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1259 Invalid, 0 Unknown, 319 Unchecked, 0.9s Time] [2022-03-03 20:02:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6698 states. [2022-03-03 20:02:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6698 to 2821. [2022-03-03 20:02:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 3.6141843971631205) internal successors, (10192), 2820 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 10192 transitions. [2022-03-03 20:02:54,504 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 10192 transitions. Word has length 26 [2022-03-03 20:02:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:54,504 INFO L470 AbstractCegarLoop]: Abstraction has 2821 states and 10192 transitions. [2022-03-03 20:02:54,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-03 20:02:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 10192 transitions. [2022-03-03 20:02:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:02:54,508 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:54,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:54,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-03 20:02:54,709 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 [2022-03-03 20:02:54,709 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:54,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 23 times [2022-03-03 20:02:54,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:54,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037548041] [2022-03-03 20:02:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:54,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:54,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:54,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037548041] [2022-03-03 20:02:54,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037548041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:54,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544770942] [2022-03-03 20:02:54,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:02:54,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:54,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:55,000 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:55,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 20:02:55,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:02:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:55,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 20:02:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:55,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:55,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:02:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:56,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:56,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:56,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 161 [2022-03-03 20:03:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:01,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544770942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:01,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:01,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:03:01,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182401063] [2022-03-03 20:03:01,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:01,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:03:01,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:01,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:03:01,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:03:01,365 INFO L87 Difference]: Start difference. First operand 2821 states and 10192 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:11,645 INFO L93 Difference]: Finished difference Result 5726 states and 19035 transitions. [2022-03-03 20:03:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-03 20:03:11,646 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-03-03 20:03:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:11,656 INFO L225 Difference]: With dead ends: 5726 [2022-03-03 20:03:11,656 INFO L226 Difference]: Without dead ends: 5612 [2022-03-03 20:03:11,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2117, Invalid=12403, Unknown=0, NotChecked=0, Total=14520 [2022-03-03 20:03:11,657 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 602 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:11,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 367 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1099 Invalid, 0 Unknown, 318 Unchecked, 0.9s Time] [2022-03-03 20:03:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5612 states. [2022-03-03 20:03:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5612 to 3007. [2022-03-03 20:03:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 3.614105123087159) internal successors, (10864), 3006 states have internal predecessors, (10864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 10864 transitions. [2022-03-03 20:03:11,719 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 10864 transitions. Word has length 26 [2022-03-03 20:03:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:11,719 INFO L470 AbstractCegarLoop]: Abstraction has 3007 states and 10864 transitions. [2022-03-03 20:03:11,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 10864 transitions. [2022-03-03 20:03:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:11,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:11,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:11,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:11,924 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 [2022-03-03 20:03:11,925 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2130990306, now seen corresponding path program 37 times [2022-03-03 20:03:11,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:11,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482474106] [2022-03-03 20:03:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:11,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:12,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:12,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482474106] [2022-03-03 20:03:12,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482474106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:12,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354710106] [2022-03-03 20:03:12,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:12,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:12,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:12,294 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:03:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 20:03:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:12,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:03:12,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:12,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:12,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:03:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:13,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:13,689 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:03:13,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:03:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:14,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354710106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:14,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:14,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:03:14,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959237159] [2022-03-03 20:03:14,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:14,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:03:14,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:03:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:03:14,277 INFO L87 Difference]: Start difference. First operand 3007 states and 10864 transitions. Second operand has 25 states, 25 states have (on average 2.76) 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) [2022-03-03 20:03:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:16,931 INFO L93 Difference]: Finished difference Result 4711 states and 16140 transitions. [2022-03-03 20:03:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:03:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) 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 26 [2022-03-03 20:03:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:16,942 INFO L225 Difference]: With dead ends: 4711 [2022-03-03 20:03:16,942 INFO L226 Difference]: Without dead ends: 4681 [2022-03-03 20:03:16,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=630, Invalid=3530, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 20:03:16,943 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 235 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:16,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 317 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:03:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4681 states. [2022-03-03 20:03:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4681 to 3029. [2022-03-03 20:03:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.60997357992074) internal successors, (10931), 3028 states have internal predecessors, (10931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 10931 transitions. [2022-03-03 20:03:17,004 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 10931 transitions. Word has length 26 [2022-03-03 20:03:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:17,004 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 10931 transitions. [2022-03-03 20:03:17,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) 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) [2022-03-03 20:03:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 10931 transitions. [2022-03-03 20:03:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:17,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:17,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:17,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-03 20:03:17,210 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 [2022-03-03 20:03:17,210 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:17,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:17,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1013224948, now seen corresponding path program 38 times [2022-03-03 20:03:17,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:17,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180685756] [2022-03-03 20:03:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:17,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:17,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:17,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180685756] [2022-03-03 20:03:17,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180685756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:17,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800852849] [2022-03-03 20:03:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:17,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:17,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:17,534 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:03:17,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 20:03:17,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:17,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:17,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:03:17,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:18,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:18,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-03-03 20:03:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:19,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:19,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:19,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:19,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:19,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:19,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 143 [2022-03-03 20:03:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:20,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800852849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:20,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:20,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:03:20,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640665927] [2022-03-03 20:03:20,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:20,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:03:20,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:03:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:03:20,106 INFO L87 Difference]: Start difference. First operand 3029 states and 10931 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:25,445 INFO L93 Difference]: Finished difference Result 4878 states and 16602 transitions. [2022-03-03 20:03:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:03:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 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 26 [2022-03-03 20:03:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:25,455 INFO L225 Difference]: With dead ends: 4878 [2022-03-03 20:03:25,455 INFO L226 Difference]: Without dead ends: 4748 [2022-03-03 20:03:25,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=982, Invalid=4718, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 20:03:25,456 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 356 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:25,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 335 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:03:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2022-03-03 20:03:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3093. [2022-03-03 20:03:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.595407503234153) internal successors, (11117), 3092 states have internal predecessors, (11117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 11117 transitions. [2022-03-03 20:03:25,530 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 11117 transitions. Word has length 26 [2022-03-03 20:03:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:25,531 INFO L470 AbstractCegarLoop]: Abstraction has 3093 states and 11117 transitions. [2022-03-03 20:03:25,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 11117 transitions. [2022-03-03 20:03:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:25,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:25,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:25,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:25,751 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 [2022-03-03 20:03:25,751 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 39 times [2022-03-03 20:03:25,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:25,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147506363] [2022-03-03 20:03:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:26,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:26,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147506363] [2022-03-03 20:03:26,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147506363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:26,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550085578] [2022-03-03 20:03:26,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:26,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:26,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:26,108 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:03:26,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 20:03:26,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:03:26,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:26,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:03:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:26,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:26,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:26,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 111 [2022-03-03 20:03:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:28,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:29,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:29,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:29,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:29,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 93 [2022-03-03 20:03:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:29,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550085578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:29,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:29,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-03-03 20:03:29,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135392542] [2022-03-03 20:03:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:29,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:03:29,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:03:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:03:29,880 INFO L87 Difference]: Start difference. First operand 3093 states and 11117 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:35,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:35,497 INFO L93 Difference]: Finished difference Result 5734 states and 19356 transitions. [2022-03-03 20:03:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 20:03:35,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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 26 [2022-03-03 20:03:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:35,508 INFO L225 Difference]: With dead ends: 5734 [2022-03-03 20:03:35,509 INFO L226 Difference]: Without dead ends: 5689 [2022-03-03 20:03:35,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1204, Invalid=6278, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 20:03:35,509 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 414 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 848 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:35,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 544 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1476 Invalid, 0 Unknown, 848 Unchecked, 0.8s Time] [2022-03-03 20:03:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2022-03-03 20:03:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 3168. [2022-03-03 20:03:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3168 states, 3167 states have (on average 3.5841490369434794) internal successors, (11351), 3167 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3168 states to 3168 states and 11351 transitions. [2022-03-03 20:03:35,586 INFO L78 Accepts]: Start accepts. Automaton has 3168 states and 11351 transitions. Word has length 26 [2022-03-03 20:03:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:35,586 INFO L470 AbstractCegarLoop]: Abstraction has 3168 states and 11351 transitions. [2022-03-03 20:03:35,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3168 states and 11351 transitions. [2022-03-03 20:03:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:35,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:35,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:35,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-03 20:03:35,792 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 [2022-03-03 20:03:35,792 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1528867272, now seen corresponding path program 40 times [2022-03-03 20:03:35,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:35,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157734971] [2022-03-03 20:03:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:35,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:36,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:36,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157734971] [2022-03-03 20:03:36,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157734971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:36,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058114281] [2022-03-03 20:03:36,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:36,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:36,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:36,152 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:03:36,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 20:03:36,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:36,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:03:36,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:36,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:36,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:36,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:36,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-03-03 20:03:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:36,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:37,403 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:03:37,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 153 [2022-03-03 20:03:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:37,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058114281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:37,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:37,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-03 20:03:37,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968462738] [2022-03-03 20:03:37,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:37,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:03:37,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:03:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:03:37,905 INFO L87 Difference]: Start difference. First operand 3168 states and 11351 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:41,694 INFO L93 Difference]: Finished difference Result 5039 states and 17072 transitions. [2022-03-03 20:03:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 20:03:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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 26 [2022-03-03 20:03:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:41,704 INFO L225 Difference]: With dead ends: 5039 [2022-03-03 20:03:41,705 INFO L226 Difference]: Without dead ends: 5009 [2022-03-03 20:03:41,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=899, Invalid=5107, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 20:03:41,705 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 251 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:41,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 432 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1506 Invalid, 0 Unknown, 156 Unchecked, 0.8s Time] [2022-03-03 20:03:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2022-03-03 20:03:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 3194. [2022-03-03 20:03:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3193 states have (on average 3.5797056060131536) internal successors, (11430), 3193 states have internal predecessors, (11430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 11430 transitions. [2022-03-03 20:03:41,775 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 11430 transitions. Word has length 26 [2022-03-03 20:03:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:41,775 INFO L470 AbstractCegarLoop]: Abstraction has 3194 states and 11430 transitions. [2022-03-03 20:03:41,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 11430 transitions. [2022-03-03 20:03:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:41,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:41,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:41,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-03 20:03:41,981 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 [2022-03-03 20:03:41,982 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 24 times [2022-03-03 20:03:41,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:41,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783286415] [2022-03-03 20:03:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:42,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:42,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783286415] [2022-03-03 20:03:42,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783286415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:42,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812831844] [2022-03-03 20:03:42,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:42,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:42,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:42,320 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:03:42,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 20:03:42,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:03:42,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:42,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:03:42,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:43,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:43,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:03:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:43,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:44,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:44,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:44,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:44,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-03-03 20:03:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:45,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812831844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:45,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:45,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:03:45,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893614585] [2022-03-03 20:03:45,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:45,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:03:45,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:03:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:03:45,224 INFO L87 Difference]: Start difference. First operand 3194 states and 11430 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:00,361 INFO L93 Difference]: Finished difference Result 7537 states and 24984 transitions. [2022-03-03 20:04:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-03 20:04:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:00,378 INFO L225 Difference]: With dead ends: 7537 [2022-03-03 20:04:00,378 INFO L226 Difference]: Without dead ends: 7492 [2022-03-03 20:04:00,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8971 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=3480, Invalid=18276, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 20:04:00,379 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 756 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 973 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:00,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 824 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1881 Invalid, 0 Unknown, 973 Unchecked, 1.2s Time] [2022-03-03 20:04:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2022-03-03 20:04:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 3272. [2022-03-03 20:04:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3271 states have (on average 3.5912564964842555) internal successors, (11747), 3271 states have internal predecessors, (11747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 11747 transitions. [2022-03-03 20:04:00,516 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 11747 transitions. Word has length 26 [2022-03-03 20:04:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:00,516 INFO L470 AbstractCegarLoop]: Abstraction has 3272 states and 11747 transitions. [2022-03-03 20:04:00,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 11747 transitions. [2022-03-03 20:04:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:00,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:00,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:00,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:00,736 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 [2022-03-03 20:04:00,736 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2027633530, now seen corresponding path program 25 times [2022-03-03 20:04:00,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:00,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814510935] [2022-03-03 20:04:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:00,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:01,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:01,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814510935] [2022-03-03 20:04:01,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814510935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:01,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152367089] [2022-03-03 20:04:01,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:04:01,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:01,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:01,029 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:01,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 20:04:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:04:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:01,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:01,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:01,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:04:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:01,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:02,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:02,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:02,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:04:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:04,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152367089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:04,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:04,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:04:04,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580708770] [2022-03-03 20:04:04,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:04,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:04,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:04,222 INFO L87 Difference]: Start difference. First operand 3272 states and 11747 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:08,748 INFO L93 Difference]: Finished difference Result 6753 states and 21979 transitions. [2022-03-03 20:04:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:04:08,749 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:08,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:08,763 INFO L225 Difference]: With dead ends: 6753 [2022-03-03 20:04:08,763 INFO L226 Difference]: Without dead ends: 6723 [2022-03-03 20:04:08,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1265, Invalid=4285, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:04:08,764 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 575 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:08,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 378 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1296 Invalid, 0 Unknown, 144 Unchecked, 0.8s Time] [2022-03-03 20:04:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6723 states. [2022-03-03 20:04:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6723 to 3341. [2022-03-03 20:04:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.5994011976047906) internal successors, (12022), 3340 states have internal predecessors, (12022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 12022 transitions. [2022-03-03 20:04:08,863 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 12022 transitions. Word has length 26 [2022-03-03 20:04:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:08,863 INFO L470 AbstractCegarLoop]: Abstraction has 3341 states and 12022 transitions. [2022-03-03 20:04:08,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 12022 transitions. [2022-03-03 20:04:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:08,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:08,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:08,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 20:04:09,069 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 [2022-03-03 20:04:09,069 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1623096648, now seen corresponding path program 26 times [2022-03-03 20:04:09,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:09,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364809538] [2022-03-03 20:04:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:09,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:09,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:09,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364809538] [2022-03-03 20:04:09,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364809538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:09,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941881717] [2022-03-03 20:04:09,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:04:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:09,384 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:09,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 20:04:09,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:04:09,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:09,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:04:09,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:10,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:10,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:10,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:04:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:11,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:11,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:11,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:11,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:11,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 145 [2022-03-03 20:04:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:12,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941881717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:12,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:12,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:04:12,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125949149] [2022-03-03 20:04:12,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:12,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:04:12,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:04:12,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:04:12,649 INFO L87 Difference]: Start difference. First operand 3341 states and 12022 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:25,483 INFO L93 Difference]: Finished difference Result 8123 states and 27089 transitions. [2022-03-03 20:04:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-03 20:04:25,484 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:25,527 INFO L225 Difference]: With dead ends: 8123 [2022-03-03 20:04:25,527 INFO L226 Difference]: Without dead ends: 8055 [2022-03-03 20:04:25,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9366 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=3585, Invalid=19367, Unknown=0, NotChecked=0, Total=22952 [2022-03-03 20:04:25,528 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 780 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1331 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:25,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 824 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1852 Invalid, 0 Unknown, 1331 Unchecked, 1.2s Time] [2022-03-03 20:04:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2022-03-03 20:04:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 3345. [2022-03-03 20:04:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 3344 states have (on average 3.598385167464115) internal successors, (12033), 3344 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 12033 transitions. [2022-03-03 20:04:25,626 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 12033 transitions. Word has length 26 [2022-03-03 20:04:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:25,627 INFO L470 AbstractCegarLoop]: Abstraction has 3345 states and 12033 transitions. [2022-03-03 20:04:25,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 12033 transitions. [2022-03-03 20:04:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:25,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:25,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:25,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:25,856 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 [2022-03-03 20:04:25,857 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:25,857 INFO L85 PathProgramCache]: Analyzing trace with hash -437763154, now seen corresponding path program 27 times [2022-03-03 20:04:25,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:25,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417237455] [2022-03-03 20:04:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:26,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:26,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417237455] [2022-03-03 20:04:26,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417237455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:26,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160130768] [2022-03-03 20:04:26,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:04:26,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:26,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:26,158 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:26,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 20:04:26,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:04:26,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:26,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:04:26,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:28,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:04:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:28,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:29,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:29,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-03-03 20:04:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:33,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160130768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:33,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:33,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:04:33,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687728950] [2022-03-03 20:04:33,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:33,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:33,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:33,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:33,076 INFO L87 Difference]: Start difference. First operand 3345 states and 12033 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:37,088 INFO L93 Difference]: Finished difference Result 6473 states and 21339 transitions. [2022-03-03 20:04:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:04:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:37,102 INFO L225 Difference]: With dead ends: 6473 [2022-03-03 20:04:37,103 INFO L226 Difference]: Without dead ends: 6443 [2022-03-03 20:04:37,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1253, Invalid=4297, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:04:37,103 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 476 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:37,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 311 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 938 Invalid, 0 Unknown, 431 Unchecked, 0.6s Time] [2022-03-03 20:04:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6443 states. [2022-03-03 20:04:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6443 to 3353. [2022-03-03 20:04:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 3.600238663484487) internal successors, (12068), 3352 states have internal predecessors, (12068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 12068 transitions. [2022-03-03 20:04:37,183 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 12068 transitions. Word has length 26 [2022-03-03 20:04:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:37,183 INFO L470 AbstractCegarLoop]: Abstraction has 3353 states and 12068 transitions. [2022-03-03 20:04:37,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 12068 transitions. [2022-03-03 20:04:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:37,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:37,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:37,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-03 20:04:37,389 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 [2022-03-03 20:04:37,389 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash 238453832, now seen corresponding path program 28 times [2022-03-03 20:04:37,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:37,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650280694] [2022-03-03 20:04:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:37,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:37,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:37,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650280694] [2022-03-03 20:04:37,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650280694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:37,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884088020] [2022-03-03 20:04:37,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:04:37,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:37,668 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:37,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 20:04:37,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:04:37,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:37,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:04:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:38,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:38,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:38,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:04:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:38,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:39,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:39,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:39,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:04:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:41,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884088020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:41,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:41,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:04:41,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380383140] [2022-03-03 20:04:41,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:41,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:04:41,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:04:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:04:41,132 INFO L87 Difference]: Start difference. First operand 3353 states and 12068 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-03 20:04:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:47,219 INFO L93 Difference]: Finished difference Result 7160 states and 23432 transitions. [2022-03-03 20:04:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 20:04:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-03-03 20:04:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:47,233 INFO L225 Difference]: With dead ends: 7160 [2022-03-03 20:04:47,234 INFO L226 Difference]: Without dead ends: 7122 [2022-03-03 20:04:47,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1460, Invalid=5020, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 20:04:47,234 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 574 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:47,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 448 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1416 Invalid, 0 Unknown, 286 Unchecked, 0.9s Time] [2022-03-03 20:04:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-03-03 20:04:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 3346. [2022-03-03 20:04:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3346 states, 3345 states have (on average 3.5961136023916294) internal successors, (12029), 3345 states have internal predecessors, (12029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 12029 transitions. [2022-03-03 20:04:47,315 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 12029 transitions. Word has length 26 [2022-03-03 20:04:47,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:47,315 INFO L470 AbstractCegarLoop]: Abstraction has 3346 states and 12029 transitions. [2022-03-03 20:04:47,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-03 20:04:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 12029 transitions. [2022-03-03 20:04:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:47,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:47,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:47,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-03 20:04:47,521 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 [2022-03-03 20:04:47,521 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1198785412, now seen corresponding path program 29 times [2022-03-03 20:04:47,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:47,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869164201] [2022-03-03 20:04:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:47,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:47,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:47,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869164201] [2022-03-03 20:04:47,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869164201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:47,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344474188] [2022-03-03 20:04:47,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:47,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:47,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:47,868 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:47,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 20:04:47,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:47,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:04:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:48,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:48,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:48,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:04:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:48,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:49,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:49,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:49,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:04:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:50,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344474188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:50,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:50,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:04:50,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864647522] [2022-03-03 20:04:50,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:50,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:04:50,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:50,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:04:50,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:04:50,891 INFO L87 Difference]: Start difference. First operand 3346 states and 12029 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:59,669 INFO L93 Difference]: Finished difference Result 7996 states and 25854 transitions. [2022-03-03 20:04:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-03 20:04:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:59,686 INFO L225 Difference]: With dead ends: 7996 [2022-03-03 20:04:59,686 INFO L226 Difference]: Without dead ends: 7947 [2022-03-03 20:04:59,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4169 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1812, Invalid=8900, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 20:04:59,687 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 651 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:59,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 373 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 956 Invalid, 0 Unknown, 755 Unchecked, 0.7s Time] [2022-03-03 20:04:59,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-03-03 20:04:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 3417. [2022-03-03 20:04:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.5992388758782203) internal successors, (12295), 3416 states have internal predecessors, (12295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 12295 transitions. [2022-03-03 20:04:59,777 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 12295 transitions. Word has length 26 [2022-03-03 20:04:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:59,777 INFO L470 AbstractCegarLoop]: Abstraction has 3417 states and 12295 transitions. [2022-03-03 20:04:59,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 12295 transitions. [2022-03-03 20:04:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:59,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:59,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:59,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 20:04:59,983 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 [2022-03-03 20:04:59,983 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash -418747368, now seen corresponding path program 30 times [2022-03-03 20:04:59,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:59,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462438101] [2022-03-03 20:04:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:59,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:00,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:00,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462438101] [2022-03-03 20:05:00,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462438101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:00,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182152149] [2022-03-03 20:05:00,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:05:00,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:00,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:00,296 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:00,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 20:05:00,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:05:00,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:05:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:00,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:00,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:05:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:01,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:01,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:01,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:01,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:01,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-03-03 20:05:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:02,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182152149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:02,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:02,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:05:02,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507943021] [2022-03-03 20:05:02,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:02,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:05:02,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:05:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:05:02,564 INFO L87 Difference]: Start difference. First operand 3417 states and 12295 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:11,332 INFO L93 Difference]: Finished difference Result 7276 states and 24405 transitions. [2022-03-03 20:05:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 20:05:11,332 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:05:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:11,347 INFO L225 Difference]: With dead ends: 7276 [2022-03-03 20:05:11,348 INFO L226 Difference]: Without dead ends: 7232 [2022-03-03 20:05:11,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1805, Invalid=8295, Unknown=0, NotChecked=0, Total=10100 [2022-03-03 20:05:11,348 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 687 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 712 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:11,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 513 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1381 Invalid, 0 Unknown, 712 Unchecked, 0.9s Time] [2022-03-03 20:05:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2022-03-03 20:05:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 3418. [2022-03-03 20:05:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3417 states have (on average 3.5958443078724027) internal successors, (12287), 3417 states have internal predecessors, (12287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 12287 transitions. [2022-03-03 20:05:11,440 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 12287 transitions. Word has length 26 [2022-03-03 20:05:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:11,440 INFO L470 AbstractCegarLoop]: Abstraction has 3418 states and 12287 transitions. [2022-03-03 20:05:11,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 12287 transitions. [2022-03-03 20:05:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:11,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:11,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:11,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-03 20:05:11,646 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 [2022-03-03 20:05:11,647 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 31 times [2022-03-03 20:05:11,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:11,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579224205] [2022-03-03 20:05:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:11,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:12,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:12,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579224205] [2022-03-03 20:05:12,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579224205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:12,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627702946] [2022-03-03 20:05:12,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:05:12,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:12,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:12,012 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:12,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 20:05:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:12,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:05:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:12,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:12,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:12,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:05:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:12,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:13,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:13,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:13,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 169 [2022-03-03 20:05:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:15,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627702946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:15,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:15,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:05:15,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342594322] [2022-03-03 20:05:15,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:15,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:05:15,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:15,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:05:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:05:15,066 INFO L87 Difference]: Start difference. First operand 3418 states and 12287 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-03 20:05:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:19,406 INFO L93 Difference]: Finished difference Result 6505 states and 21480 transitions. [2022-03-03 20:05:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 20:05:19,406 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-03-03 20:05:19,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:19,419 INFO L225 Difference]: With dead ends: 6505 [2022-03-03 20:05:19,419 INFO L226 Difference]: Without dead ends: 6391 [2022-03-03 20:05:19,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=963, Invalid=4007, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 20:05:19,420 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 520 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 443 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:19,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 370 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 989 Invalid, 0 Unknown, 443 Unchecked, 0.7s Time] [2022-03-03 20:05:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2022-03-03 20:05:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 3427. [2022-03-03 20:05:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 3.5986573263280794) internal successors, (12329), 3426 states have internal predecessors, (12329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 12329 transitions. [2022-03-03 20:05:19,492 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 12329 transitions. Word has length 26 [2022-03-03 20:05:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:19,492 INFO L470 AbstractCegarLoop]: Abstraction has 3427 states and 12329 transitions. [2022-03-03 20:05:19,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-03 20:05:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 12329 transitions. [2022-03-03 20:05:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:19,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:19,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:19,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-03 20:05:19,698 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 [2022-03-03 20:05:19,699 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1873169776, now seen corresponding path program 41 times [2022-03-03 20:05:19,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:19,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520695378] [2022-03-03 20:05:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:19,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:20,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:20,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520695378] [2022-03-03 20:05:20,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520695378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:20,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894697259] [2022-03-03 20:05:20,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:05:20,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:20,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:20,030 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:20,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 20:05:20,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:05:20,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:05:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:20,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:20,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:20,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:20,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:05:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:20,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:21,406 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:05:21,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-03-03 20:05:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:21,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894697259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:21,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:21,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:05:21,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636464407] [2022-03-03 20:05:21,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:21,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:05:21,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:05:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:05:21,968 INFO L87 Difference]: Start difference. First operand 3427 states and 12329 transitions. Second operand has 25 states, 25 states have (on average 2.76) 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) [2022-03-03 20:05:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:26,894 INFO L93 Difference]: Finished difference Result 5505 states and 18677 transitions. [2022-03-03 20:05:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 20:05:26,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) 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 26 [2022-03-03 20:05:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:26,905 INFO L225 Difference]: With dead ends: 5505 [2022-03-03 20:05:26,905 INFO L226 Difference]: Without dead ends: 5396 [2022-03-03 20:05:26,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=956, Invalid=5206, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 20:05:26,906 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 301 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:26,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 471 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:05:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5396 states. [2022-03-03 20:05:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5396 to 3452. [2022-03-03 20:05:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.5957693422196466) internal successors, (12409), 3451 states have internal predecessors, (12409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 12409 transitions. [2022-03-03 20:05:26,978 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 12409 transitions. Word has length 26 [2022-03-03 20:05:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:26,978 INFO L470 AbstractCegarLoop]: Abstraction has 3452 states and 12409 transitions. [2022-03-03 20:05:26,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) 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) [2022-03-03 20:05:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 12409 transitions. [2022-03-03 20:05:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:26,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:26,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:27,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-03 20:05:27,184 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 [2022-03-03 20:05:27,184 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:27,185 INFO L85 PathProgramCache]: Analyzing trace with hash 471026418, now seen corresponding path program 42 times [2022-03-03 20:05:27,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:27,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193935447] [2022-03-03 20:05:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:27,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:27,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:27,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193935447] [2022-03-03 20:05:27,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193935447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:27,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664140247] [2022-03-03 20:05:27,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:05:27,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:27,484 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:27,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 20:05:27,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:05:27,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:05:27,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:27,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:27,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:27,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2022-03-03 20:05:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:28,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:28,956 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:05:28,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:05:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:29,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664140247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:29,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:29,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:05:29,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400545600] [2022-03-03 20:05:29,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:29,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:05:29,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:05:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:05:29,538 INFO L87 Difference]: Start difference. First operand 3452 states and 12409 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:38,974 INFO L93 Difference]: Finished difference Result 7542 states and 25144 transitions. [2022-03-03 20:05:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-03 20:05:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:05:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:38,990 INFO L225 Difference]: With dead ends: 7542 [2022-03-03 20:05:38,991 INFO L226 Difference]: Without dead ends: 7498 [2022-03-03 20:05:38,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6230 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3037, Invalid=12965, Unknown=0, NotChecked=0, Total=16002 [2022-03-03 20:05:38,992 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 599 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:38,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 517 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:05:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2022-03-03 20:05:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 3469. [2022-03-03 20:05:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 3.5980392156862746) internal successors, (12478), 3468 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 12478 transitions. [2022-03-03 20:05:39,096 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 12478 transitions. Word has length 26 [2022-03-03 20:05:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:39,097 INFO L470 AbstractCegarLoop]: Abstraction has 3469 states and 12478 transitions. [2022-03-03 20:05:39,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 12478 transitions. [2022-03-03 20:05:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:39,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:39,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:39,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-03 20:05:39,302 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 [2022-03-03 20:05:39,303 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1954161356, now seen corresponding path program 43 times [2022-03-03 20:05:39,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:39,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057783682] [2022-03-03 20:05:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:39,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:39,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:39,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057783682] [2022-03-03 20:05:39,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057783682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:39,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682469196] [2022-03-03 20:05:39,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:05:39,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:39,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:39,611 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:39,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 20:05:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:39,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:05:39,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:40,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:40,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:40,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:40,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 75 [2022-03-03 20:05:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:40,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:40,668 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:05:40,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:05:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:41,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682469196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:41,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:41,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:05:41,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807364384] [2022-03-03 20:05:41,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:41,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:05:41,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:05:41,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:05:41,185 INFO L87 Difference]: Start difference. First operand 3469 states and 12478 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:51,742 INFO L93 Difference]: Finished difference Result 7093 states and 23466 transitions. [2022-03-03 20:05:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-03 20:05:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:05:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:51,756 INFO L225 Difference]: With dead ends: 7093 [2022-03-03 20:05:51,756 INFO L226 Difference]: Without dead ends: 7063 [2022-03-03 20:05:51,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8850 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3254, Invalid=17626, Unknown=0, NotChecked=0, Total=20880 [2022-03-03 20:05:51,757 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 468 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:51,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 690 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2010 Invalid, 0 Unknown, 201 Unchecked, 1.2s Time] [2022-03-03 20:05:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7063 states. [2022-03-03 20:05:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7063 to 3468. [2022-03-03 20:05:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 3.5976348428035765) internal successors, (12473), 3467 states have internal predecessors, (12473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12473 transitions. [2022-03-03 20:05:51,839 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12473 transitions. Word has length 26 [2022-03-03 20:05:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:51,839 INFO L470 AbstractCegarLoop]: Abstraction has 3468 states and 12473 transitions. [2022-03-03 20:05:51,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12473 transitions. [2022-03-03 20:05:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:51,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:51,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:51,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 20:05:52,045 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 [2022-03-03 20:05:52,046 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:52,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:52,046 INFO L85 PathProgramCache]: Analyzing trace with hash -688173796, now seen corresponding path program 32 times [2022-03-03 20:05:52,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:52,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541361518] [2022-03-03 20:05:52,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:52,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:52,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:52,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541361518] [2022-03-03 20:05:52,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541361518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:52,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374433597] [2022-03-03 20:05:52,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:05:52,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:52,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:52,413 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:52,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 20:05:52,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:05:52,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:05:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:56,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:56,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:05:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:56,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:57,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:57,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:57,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:57,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 145 [2022-03-03 20:05:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:58,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374433597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:58,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:58,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-03-03 20:05:58,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769053874] [2022-03-03 20:05:58,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:58,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 20:05:58,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 20:05:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-03 20:05:58,137 INFO L87 Difference]: Start difference. First operand 3468 states and 12473 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) 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) [2022-03-03 20:06:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:04,526 INFO L93 Difference]: Finished difference Result 6642 states and 22406 transitions. [2022-03-03 20:06:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 20:06:04,526 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) 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 26 [2022-03-03 20:06:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:04,539 INFO L225 Difference]: With dead ends: 6642 [2022-03-03 20:06:04,540 INFO L226 Difference]: Without dead ends: 6628 [2022-03-03 20:06:04,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1157, Invalid=7215, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 20:06:04,540 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 409 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:04,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 409 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 949 Invalid, 0 Unknown, 411 Unchecked, 0.6s Time] [2022-03-03 20:06:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2022-03-03 20:06:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 3624. [2022-03-03 20:06:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 3.592602815346398) internal successors, (13016), 3623 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 13016 transitions. [2022-03-03 20:06:04,642 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 13016 transitions. Word has length 26 [2022-03-03 20:06:04,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:04,642 INFO L470 AbstractCegarLoop]: Abstraction has 3624 states and 13016 transitions. [2022-03-03 20:06:04,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) 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) [2022-03-03 20:06:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 13016 transitions. [2022-03-03 20:06:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:04,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:04,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:04,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 20:06:04,847 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 [2022-03-03 20:06:04,848 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1034669180, now seen corresponding path program 33 times [2022-03-03 20:06:04,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:04,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761335665] [2022-03-03 20:06:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:04,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:05,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:05,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761335665] [2022-03-03 20:06:05,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761335665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:05,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239402652] [2022-03-03 20:06:05,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:06:05,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:05,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:05,272 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:05,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 20:06:05,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:06:05,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:05,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:06:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:06,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:06,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:06,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:06:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:06,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:07,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:07,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-03-03 20:06:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:12,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239402652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:12,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:12,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-03 20:06:12,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075398161] [2022-03-03 20:06:12,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:12,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:06:12,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:12,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:06:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:06:12,784 INFO L87 Difference]: Start difference. First operand 3624 states and 13016 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:19,222 INFO L93 Difference]: Finished difference Result 7436 states and 24638 transitions. [2022-03-03 20:06:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 20:06:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) 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 26 [2022-03-03 20:06:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:19,237 INFO L225 Difference]: With dead ends: 7436 [2022-03-03 20:06:19,237 INFO L226 Difference]: Without dead ends: 7394 [2022-03-03 20:06:19,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1359, Invalid=7013, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 20:06:19,237 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 394 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:19,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 443 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1268 Invalid, 0 Unknown, 347 Unchecked, 0.8s Time] [2022-03-03 20:06:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7394 states. [2022-03-03 20:06:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7394 to 3587. [2022-03-03 20:06:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 3.593418851087563) internal successors, (12886), 3586 states have internal predecessors, (12886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 12886 transitions. [2022-03-03 20:06:19,314 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 12886 transitions. Word has length 26 [2022-03-03 20:06:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:19,315 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 12886 transitions. [2022-03-03 20:06:19,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 12886 transitions. [2022-03-03 20:06:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:19,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:19,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:19,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-03 20:06:19,520 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 [2022-03-03 20:06:19,521 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash 44324108, now seen corresponding path program 34 times [2022-03-03 20:06:19,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:19,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382021785] [2022-03-03 20:06:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:19,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:19,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:19,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382021785] [2022-03-03 20:06:19,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382021785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:19,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978820876] [2022-03-03 20:06:19,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:06:19,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:19,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:19,809 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:19,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 20:06:19,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:06:19,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:06:19,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:21,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:21,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:21,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:06:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:21,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:22,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:22,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-03-03 20:06:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:25,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978820876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:25,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:25,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:06:25,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316513014] [2022-03-03 20:06:25,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:25,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:06:25,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:06:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:06:25,823 INFO L87 Difference]: Start difference. First operand 3587 states and 12886 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:28,726 INFO L93 Difference]: Finished difference Result 5901 states and 19840 transitions. [2022-03-03 20:06:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:06:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) 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 26 [2022-03-03 20:06:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:28,736 INFO L225 Difference]: With dead ends: 5901 [2022-03-03 20:06:28,737 INFO L226 Difference]: Without dead ends: 5853 [2022-03-03 20:06:28,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=744, Invalid=3288, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 20:06:28,737 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 339 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:28,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 274 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 750 Invalid, 0 Unknown, 187 Unchecked, 0.5s Time] [2022-03-03 20:06:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2022-03-03 20:06:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 3548. [2022-03-03 20:06:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3547 states have (on average 3.5934592613476175) internal successors, (12746), 3547 states have internal predecessors, (12746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 12746 transitions. [2022-03-03 20:06:28,798 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 12746 transitions. Word has length 26 [2022-03-03 20:06:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:28,798 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 12746 transitions. [2022-03-03 20:06:28,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 12746 transitions. [2022-03-03 20:06:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:28,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:28,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:28,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-03 20:06:29,003 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 [2022-03-03 20:06:29,004 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash -34983442, now seen corresponding path program 44 times [2022-03-03 20:06:29,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:29,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407352495] [2022-03-03 20:06:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:29,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:29,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:29,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407352495] [2022-03-03 20:06:29,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407352495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:29,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225780187] [2022-03-03 20:06:29,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:06:29,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:29,272 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:29,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 20:06:29,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:06:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:06:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:29,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:29,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:29,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:29,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 75 [2022-03-03 20:06:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:30,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:30,436 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:06:30,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:06:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:31,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225780187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:31,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:31,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:06:31,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419665811] [2022-03-03 20:06:31,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:31,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:06:31,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:06:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:06:31,073 INFO L87 Difference]: Start difference. First operand 3548 states and 12746 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:41,990 INFO L93 Difference]: Finished difference Result 7777 states and 25472 transitions. [2022-03-03 20:06:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-03 20:06:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 26 [2022-03-03 20:06:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:42,006 INFO L225 Difference]: With dead ends: 7777 [2022-03-03 20:06:42,006 INFO L226 Difference]: Without dead ends: 7747 [2022-03-03 20:06:42,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9172 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3180, Invalid=20076, Unknown=0, NotChecked=0, Total=23256 [2022-03-03 20:06:42,008 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 613 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2661 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:42,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 715 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2661 Invalid, 0 Unknown, 104 Unchecked, 1.5s Time] [2022-03-03 20:06:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7747 states. [2022-03-03 20:06:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7747 to 3548. [2022-03-03 20:06:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3547 states have (on average 3.595150831688751) internal successors, (12752), 3547 states have internal predecessors, (12752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 12752 transitions. [2022-03-03 20:06:42,103 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 12752 transitions. Word has length 26 [2022-03-03 20:06:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:42,103 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 12752 transitions. [2022-03-03 20:06:42,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 12752 transitions. [2022-03-03 20:06:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:42,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:42,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:42,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-03 20:06:42,309 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 [2022-03-03 20:06:42,310 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:42,310 INFO L85 PathProgramCache]: Analyzing trace with hash -984788936, now seen corresponding path program 35 times [2022-03-03 20:06:42,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:42,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101579718] [2022-03-03 20:06:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:42,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:42,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101579718] [2022-03-03 20:06:42,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101579718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:42,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549800398] [2022-03-03 20:06:42,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:06:42,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:42,544 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:42,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 20:06:42,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:06:42,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:42,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:06:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:43,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:43,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:43,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:06:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:43,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:43,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:43,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:43,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:06:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:45,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549800398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:45,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:45,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:06:45,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123476445] [2022-03-03 20:06:45,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:45,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:06:45,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:45,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:06:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:06:45,142 INFO L87 Difference]: Start difference. First operand 3548 states and 12752 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:53,968 INFO L93 Difference]: Finished difference Result 6318 states and 20736 transitions. [2022-03-03 20:06:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-03 20:06:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 26 [2022-03-03 20:06:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:53,981 INFO L225 Difference]: With dead ends: 6318 [2022-03-03 20:06:53,981 INFO L226 Difference]: Without dead ends: 6224 [2022-03-03 20:06:53,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5170 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2018, Invalid=12988, Unknown=0, NotChecked=0, Total=15006 [2022-03-03 20:06:53,982 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 444 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:53,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 566 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:06:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6224 states. [2022-03-03 20:06:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6224 to 3629. [2022-03-03 20:06:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 3.59013230429989) internal successors, (13025), 3628 states have internal predecessors, (13025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 13025 transitions. [2022-03-03 20:06:54,075 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 13025 transitions. Word has length 26 [2022-03-03 20:06:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:54,075 INFO L470 AbstractCegarLoop]: Abstraction has 3629 states and 13025 transitions. [2022-03-03 20:06:54,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 13025 transitions. [2022-03-03 20:06:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:54,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:54,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:54,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-03 20:06:54,281 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 [2022-03-03 20:06:54,282 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:54,282 INFO L85 PathProgramCache]: Analyzing trace with hash -655629364, now seen corresponding path program 36 times [2022-03-03 20:06:54,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:54,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634819531] [2022-03-03 20:06:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:54,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:54,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:54,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634819531] [2022-03-03 20:06:54,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634819531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:54,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699328917] [2022-03-03 20:06:54,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:06:54,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:54,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:54,524 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:54,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 20:06:54,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:06:54,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:54,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:06:54,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:55,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:55,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:06:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:55,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:56,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:56,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:56,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:56,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-03 20:06:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:57,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699328917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:57,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:57,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:06:57,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342268972] [2022-03-03 20:06:57,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:57,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:06:57,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:06:57,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:06:57,055 INFO L87 Difference]: Start difference. First operand 3629 states and 13025 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:04,502 INFO L93 Difference]: Finished difference Result 6688 states and 22516 transitions. [2022-03-03 20:07:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:07:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 26 [2022-03-03 20:07:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:04,517 INFO L225 Difference]: With dead ends: 6688 [2022-03-03 20:07:04,517 INFO L226 Difference]: Without dead ends: 6652 [2022-03-03 20:07:04,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1146, Invalid=5496, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 20:07:04,517 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 560 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:04,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 465 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 20:07:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2022-03-03 20:07:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 3635. [2022-03-03 20:07:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3634 states have (on average 3.592184920198129) internal successors, (13054), 3634 states have internal predecessors, (13054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 13054 transitions. [2022-03-03 20:07:04,604 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 13054 transitions. Word has length 26 [2022-03-03 20:07:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:04,604 INFO L470 AbstractCegarLoop]: Abstraction has 3635 states and 13054 transitions. [2022-03-03 20:07:04,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 13054 transitions. [2022-03-03 20:07:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:04,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:04,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:04,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-03 20:07:04,810 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 [2022-03-03 20:07:04,810 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1914635640, now seen corresponding path program 37 times [2022-03-03 20:07:04,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:04,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111622071] [2022-03-03 20:07:04,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:04,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:05,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:05,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111622071] [2022-03-03 20:07:05,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111622071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:05,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367961410] [2022-03-03 20:07:05,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:07:05,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:05,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:05,068 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:05,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 20:07:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:07:05,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:05,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:05,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:05,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:07:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:05,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:06,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:06,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:06,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 171 [2022-03-03 20:07:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:07,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367961410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:07,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:07,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 20:07:07,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863171012] [2022-03-03 20:07:07,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:07,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 20:07:07,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:07,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 20:07:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:07:07,559 INFO L87 Difference]: Start difference. First operand 3635 states and 13054 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:10,723 INFO L93 Difference]: Finished difference Result 6217 states and 21011 transitions. [2022-03-03 20:07:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:07:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 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 26 [2022-03-03 20:07:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:10,736 INFO L225 Difference]: With dead ends: 6217 [2022-03-03 20:07:10,736 INFO L226 Difference]: Without dead ends: 6166 [2022-03-03 20:07:10,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=651, Invalid=2655, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:07:10,737 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 326 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:10,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 311 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:07:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6166 states. [2022-03-03 20:07:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6166 to 3661. [2022-03-03 20:07:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3661 states, 3660 states have (on average 3.596448087431694) internal successors, (13163), 3660 states have internal predecessors, (13163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 13163 transitions. [2022-03-03 20:07:10,817 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 13163 transitions. Word has length 26 [2022-03-03 20:07:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:10,817 INFO L470 AbstractCegarLoop]: Abstraction has 3661 states and 13163 transitions. [2022-03-03 20:07:10,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:10,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 13163 transitions. [2022-03-03 20:07:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:10,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:10,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:10,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-03 20:07:11,023 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 [2022-03-03 20:07:11,023 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:11,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1883610296, now seen corresponding path program 38 times [2022-03-03 20:07:11,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:11,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652198325] [2022-03-03 20:07:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:11,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:11,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652198325] [2022-03-03 20:07:11,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652198325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:11,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355849209] [2022-03-03 20:07:11,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:07:11,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:11,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:11,296 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:11,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 20:07:11,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:07:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:07:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:11,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:11,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:11,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:07:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:12,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:12,664 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:07:12,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:07:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:14,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355849209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:14,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:14,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:07:14,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722884231] [2022-03-03 20:07:14,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:14,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:07:14,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:07:14,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:07:14,718 INFO L87 Difference]: Start difference. First operand 3661 states and 13163 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:19,044 INFO L93 Difference]: Finished difference Result 6517 states and 21971 transitions. [2022-03-03 20:07:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:07:19,044 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 20:07:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:19,057 INFO L225 Difference]: With dead ends: 6517 [2022-03-03 20:07:19,057 INFO L226 Difference]: Without dead ends: 6472 [2022-03-03 20:07:19,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=953, Invalid=5527, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 20:07:19,058 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 328 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:19,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 511 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:07:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2022-03-03 20:07:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 3665. [2022-03-03 20:07:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 3.595796943231441) internal successors, (13175), 3664 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 13175 transitions. [2022-03-03 20:07:19,139 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 13175 transitions. Word has length 26 [2022-03-03 20:07:19,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:19,139 INFO L470 AbstractCegarLoop]: Abstraction has 3665 states and 13175 transitions. [2022-03-03 20:07:19,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 13175 transitions. [2022-03-03 20:07:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:19,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:19,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:19,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-03 20:07:19,346 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 [2022-03-03 20:07:19,346 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 39 times [2022-03-03 20:07:19,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:19,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771163274] [2022-03-03 20:07:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:19,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:19,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:19,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771163274] [2022-03-03 20:07:19,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771163274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:19,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424466100] [2022-03-03 20:07:19,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:07:19,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:19,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:19,532 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:19,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 20:07:19,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:07:19,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:19,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:07:19,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:20,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:20,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:20,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:07:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:20,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:20,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:20,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:20,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:07:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:21,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424466100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:21,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:21,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:07:21,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770694886] [2022-03-03 20:07:21,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:21,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:07:21,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:07:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:07:21,863 INFO L87 Difference]: Start difference. First operand 3665 states and 13175 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:24,484 INFO L93 Difference]: Finished difference Result 5436 states and 18393 transitions. [2022-03-03 20:07:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 20:07:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:24,495 INFO L225 Difference]: With dead ends: 5436 [2022-03-03 20:07:24,495 INFO L226 Difference]: Without dead ends: 5370 [2022-03-03 20:07:24,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 20:07:24,495 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 302 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:24,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 283 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:07:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5370 states. [2022-03-03 20:07:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5370 to 3706. [2022-03-03 20:07:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 3705 states have (on average 3.5894736842105264) internal successors, (13299), 3705 states have internal predecessors, (13299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 13299 transitions. [2022-03-03 20:07:24,562 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 13299 transitions. Word has length 26 [2022-03-03 20:07:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:24,563 INFO L470 AbstractCegarLoop]: Abstraction has 3706 states and 13299 transitions. [2022-03-03 20:07:24,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 13299 transitions. [2022-03-03 20:07:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:24,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:24,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:24,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:24,769 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 [2022-03-03 20:07:24,769 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:24,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2113781654, now seen corresponding path program 40 times [2022-03-03 20:07:24,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:24,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850431533] [2022-03-03 20:07:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:24,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:25,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:25,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850431533] [2022-03-03 20:07:25,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850431533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:25,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517822445] [2022-03-03 20:07:25,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:07:25,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:25,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:25,018 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:25,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 20:07:25,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:07:25,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:07:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:25,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:25,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:07:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:25,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:26,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:26,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:26,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 181 [2022-03-03 20:07:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:28,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517822445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:28,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:28,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:07:28,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334768645] [2022-03-03 20:07:28,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:28,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:07:28,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:28,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:07:28,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:07:28,281 INFO L87 Difference]: Start difference. First operand 3706 states and 13299 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-03 20:07:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:30,763 INFO L93 Difference]: Finished difference Result 5520 states and 18701 transitions. [2022-03-03 20:07:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:07:30,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 26 [2022-03-03 20:07:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:30,775 INFO L225 Difference]: With dead ends: 5520 [2022-03-03 20:07:30,776 INFO L226 Difference]: Without dead ends: 5490 [2022-03-03 20:07:30,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=488, Invalid=2164, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:07:30,776 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:30,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 342 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 814 Invalid, 0 Unknown, 413 Unchecked, 0.5s Time] [2022-03-03 20:07:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2022-03-03 20:07:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 3677. [2022-03-03 20:07:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 3.5943960826985855) internal successors, (13213), 3676 states have internal predecessors, (13213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 13213 transitions. [2022-03-03 20:07:30,869 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 13213 transitions. Word has length 26 [2022-03-03 20:07:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:30,870 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 13213 transitions. [2022-03-03 20:07:30,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-03 20:07:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 13213 transitions. [2022-03-03 20:07:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:30,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:30,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:30,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-03 20:07:31,076 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 [2022-03-03 20:07:31,076 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1437564668, now seen corresponding path program 41 times [2022-03-03 20:07:31,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:31,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981359225] [2022-03-03 20:07:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:31,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:31,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981359225] [2022-03-03 20:07:31,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981359225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:31,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211189761] [2022-03-03 20:07:31,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:07:31,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:31,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:31,337 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:31,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 20:07:31,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:07:31,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:31,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 20:07:31,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:31,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:31,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:07:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:32,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:33,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:33,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 173 [2022-03-03 20:07:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:38,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211189761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:38,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:38,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:07:38,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816762351] [2022-03-03 20:07:38,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:38,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:07:38,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:38,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:07:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:07:38,819 INFO L87 Difference]: Start difference. First operand 3677 states and 13213 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:52,615 INFO L93 Difference]: Finished difference Result 6537 states and 21976 transitions. [2022-03-03 20:07:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-03 20:07:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-03-03 20:07:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:52,628 INFO L225 Difference]: With dead ends: 6537 [2022-03-03 20:07:52,628 INFO L226 Difference]: Without dead ends: 6494 [2022-03-03 20:07:52,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4626 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2272, Invalid=10384, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 20:07:52,629 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 443 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:52,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 358 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1149 Invalid, 0 Unknown, 223 Unchecked, 0.9s Time] [2022-03-03 20:07:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6494 states. [2022-03-03 20:07:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6494 to 3703. [2022-03-03 20:07:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 3.592382495948136) internal successors, (13299), 3702 states have internal predecessors, (13299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 13299 transitions. [2022-03-03 20:07:52,746 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 13299 transitions. Word has length 26 [2022-03-03 20:07:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:52,746 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 13299 transitions. [2022-03-03 20:07:52,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 13299 transitions. [2022-03-03 20:07:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:52,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:52,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:52,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-03 20:07:52,965 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 [2022-03-03 20:07:52,965 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash -99997454, now seen corresponding path program 42 times [2022-03-03 20:07:52,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:52,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91447838] [2022-03-03 20:07:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:52,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:53,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:53,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91447838] [2022-03-03 20:07:53,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91447838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:53,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039243729] [2022-03-03 20:07:53,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:07:53,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:53,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:53,249 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:53,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 20:07:53,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:07:53,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:53,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:07:53,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:53,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:53,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:53,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:07:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:54,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:54,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:54,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:54,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 165 [2022-03-03 20:07:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:56,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039243729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:56,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:56,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:07:56,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793507385] [2022-03-03 20:07:56,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:56,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:07:56,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:07:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:07:56,370 INFO L87 Difference]: Start difference. First operand 3703 states and 13299 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:59,245 INFO L93 Difference]: Finished difference Result 6007 states and 20389 transitions. [2022-03-03 20:07:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:07:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:59,257 INFO L225 Difference]: With dead ends: 6007 [2022-03-03 20:07:59,257 INFO L226 Difference]: Without dead ends: 5977 [2022-03-03 20:07:59,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:07:59,258 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 281 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:59,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 323 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 887 Invalid, 0 Unknown, 216 Unchecked, 0.5s Time] [2022-03-03 20:07:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2022-03-03 20:07:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 3692. [2022-03-03 20:07:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3692 states, 3691 states have (on average 3.593335139528583) internal successors, (13263), 3691 states have internal predecessors, (13263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3692 states to 3692 states and 13263 transitions. [2022-03-03 20:07:59,332 INFO L78 Accepts]: Start accepts. Automaton has 3692 states and 13263 transitions. Word has length 26 [2022-03-03 20:07:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:59,332 INFO L470 AbstractCegarLoop]: Abstraction has 3692 states and 13263 transitions. [2022-03-03 20:07:59,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3692 states and 13263 transitions. [2022-03-03 20:07:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:59,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:59,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:59,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:59,539 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 [2022-03-03 20:07:59,539 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:59,539 INFO L85 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 43 times [2022-03-03 20:07:59,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:59,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108232009] [2022-03-03 20:07:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:59,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:59,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:59,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108232009] [2022-03-03 20:07:59,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108232009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:59,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844149451] [2022-03-03 20:07:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:07:59,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:59,699 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:59,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 20:07:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:59,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:07:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:00,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:00,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:00,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:08:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:00,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:00,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:00,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:00,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:08:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:03,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844149451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:03,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:03,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:08:03,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492717231] [2022-03-03 20:08:03,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:03,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:03,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:03,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:03,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:03,334 INFO L87 Difference]: Start difference. First operand 3692 states and 13263 transitions. Second operand has 25 states, 25 states have (on average 2.44) 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) [2022-03-03 20:08:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:05,591 INFO L93 Difference]: Finished difference Result 5505 states and 18690 transitions. [2022-03-03 20:08:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 20:08:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) 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 26 [2022-03-03 20:08:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:05,602 INFO L225 Difference]: With dead ends: 5505 [2022-03-03 20:08:05,603 INFO L226 Difference]: Without dead ends: 5415 [2022-03-03 20:08:05,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:08:05,603 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 262 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:05,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 239 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:08:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5415 states. [2022-03-03 20:08:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5415 to 3713. [2022-03-03 20:08:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3713 states, 3712 states have (on average 3.5932112068965516) internal successors, (13338), 3712 states have internal predecessors, (13338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3713 states to 3713 states and 13338 transitions. [2022-03-03 20:08:05,681 INFO L78 Accepts]: Start accepts. Automaton has 3713 states and 13338 transitions. Word has length 26 [2022-03-03 20:08:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:05,681 INFO L470 AbstractCegarLoop]: Abstraction has 3713 states and 13338 transitions. [2022-03-03 20:08:05,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) 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) [2022-03-03 20:08:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states and 13338 transitions. [2022-03-03 20:08:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:05,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:05,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:05,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-03 20:08:05,888 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 [2022-03-03 20:08:05,888 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash -742785592, now seen corresponding path program 44 times [2022-03-03 20:08:05,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:05,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429937030] [2022-03-03 20:08:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:05,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:06,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:06,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429937030] [2022-03-03 20:08:06,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429937030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:06,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633143621] [2022-03-03 20:08:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:08:06,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:06,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:06,056 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:06,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 20:08:06,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:08:06,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:06,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:06,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:06,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:06,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:06,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:08:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:06,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:07,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:07,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:08:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:10,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633143621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:10,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:10,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:08:10,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549397689] [2022-03-03 20:08:10,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:10,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:10,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:10,277 INFO L87 Difference]: Start difference. First operand 3713 states and 13338 transitions. Second operand has 25 states, 25 states have (on average 2.44) 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) [2022-03-03 20:08:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:13,549 INFO L93 Difference]: Finished difference Result 6011 states and 20362 transitions. [2022-03-03 20:08:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 20:08:13,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) 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 26 [2022-03-03 20:08:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:13,561 INFO L225 Difference]: With dead ends: 6011 [2022-03-03 20:08:13,561 INFO L226 Difference]: Without dead ends: 5951 [2022-03-03 20:08:13,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:08:13,562 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 275 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:13,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 279 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:08:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-03-03 20:08:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 3732. [2022-03-03 20:08:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 3731 states have (on average 3.5917984454569822) internal successors, (13401), 3731 states have internal predecessors, (13401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 13401 transitions. [2022-03-03 20:08:13,640 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 13401 transitions. Word has length 26 [2022-03-03 20:08:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:13,640 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 13401 transitions. [2022-03-03 20:08:13,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) 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) [2022-03-03 20:08:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 13401 transitions. [2022-03-03 20:08:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:13,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:13,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:13,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-03 20:08:13,847 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 [2022-03-03 20:08:13,847 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 45 times [2022-03-03 20:08:13,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:13,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110180633] [2022-03-03 20:08:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:13,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:13,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:13,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110180633] [2022-03-03 20:08:13,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110180633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:13,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104279820] [2022-03-03 20:08:13,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:08:13,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:13,995 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:13,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 20:08:14,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:08:14,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:14,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:14,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:14,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:08:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:15,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:15,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:15,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-03-03 20:08:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:18,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104279820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:18,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:18,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:08:18,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827407548] [2022-03-03 20:08:18,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:18,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:18,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:18,488 INFO L87 Difference]: Start difference. First operand 3732 states and 13401 transitions. Second operand has 25 states, 25 states have (on average 2.56) 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) [2022-03-03 20:08:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:21,496 INFO L93 Difference]: Finished difference Result 5720 states and 19437 transitions. [2022-03-03 20:08:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 20:08:21,496 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) 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 26 [2022-03-03 20:08:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:21,507 INFO L225 Difference]: With dead ends: 5720 [2022-03-03 20:08:21,507 INFO L226 Difference]: Without dead ends: 5644 [2022-03-03 20:08:21,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=682, Invalid=2740, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 20:08:21,508 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:21,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 239 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 630 Invalid, 0 Unknown, 483 Unchecked, 0.4s Time] [2022-03-03 20:08:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2022-03-03 20:08:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 3777. [2022-03-03 20:08:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 3.590042372881356) internal successors, (13556), 3776 states have internal predecessors, (13556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 13556 transitions. [2022-03-03 20:08:21,575 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 13556 transitions. Word has length 26 [2022-03-03 20:08:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:21,576 INFO L470 AbstractCegarLoop]: Abstraction has 3777 states and 13556 transitions. [2022-03-03 20:08:21,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) 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) [2022-03-03 20:08:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 13556 transitions. [2022-03-03 20:08:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:21,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:21,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:21,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-03 20:08:21,781 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 [2022-03-03 20:08:21,782 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 46 times [2022-03-03 20:08:21,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:21,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168096779] [2022-03-03 20:08:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:21,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:22,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:22,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168096779] [2022-03-03 20:08:22,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168096779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:22,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941385998] [2022-03-03 20:08:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:08:22,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:22,027 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:22,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 20:08:22,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:08:22,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:22,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:22,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:08:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:22,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:23,206 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:08:23,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-03-03 20:08:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:26,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941385998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:26,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:26,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:08:26,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141266476] [2022-03-03 20:08:26,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:26,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:26,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:26,049 INFO L87 Difference]: Start difference. First operand 3777 states and 13556 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:27,552 INFO L93 Difference]: Finished difference Result 5882 states and 20112 transitions. [2022-03-03 20:08:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 20:08:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:27,564 INFO L225 Difference]: With dead ends: 5882 [2022-03-03 20:08:27,564 INFO L226 Difference]: Without dead ends: 5837 [2022-03-03 20:08:27,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:08:27,565 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 160 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:27,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 366 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 986 Invalid, 0 Unknown, 299 Unchecked, 0.5s Time] [2022-03-03 20:08:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2022-03-03 20:08:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 3806. [2022-03-03 20:08:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3805 states have (on average 3.588961892247043) internal successors, (13656), 3805 states have internal predecessors, (13656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 13656 transitions. [2022-03-03 20:08:27,636 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 13656 transitions. Word has length 26 [2022-03-03 20:08:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:27,636 INFO L470 AbstractCegarLoop]: Abstraction has 3806 states and 13656 transitions. [2022-03-03 20:08:27,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 13656 transitions. [2022-03-03 20:08:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:27,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:27,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:27,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-03 20:08:27,842 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 [2022-03-03 20:08:27,842 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:27,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:27,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 47 times [2022-03-03 20:08:27,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:27,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088486207] [2022-03-03 20:08:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:27,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:28,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:28,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088486207] [2022-03-03 20:08:28,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088486207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:28,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857783292] [2022-03-03 20:08:28,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:08:28,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:28,104 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:28,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 20:08:28,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:08:28,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:28,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:28,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:28,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:08:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:28,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:29,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:29,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:29,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:08:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:32,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857783292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:32,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:32,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:08:32,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196580516] [2022-03-03 20:08:32,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:32,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:32,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:32,932 INFO L87 Difference]: Start difference. First operand 3806 states and 13656 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:34,653 INFO L93 Difference]: Finished difference Result 5254 states and 18061 transitions. [2022-03-03 20:08:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:08:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) 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 26 [2022-03-03 20:08:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:34,664 INFO L225 Difference]: With dead ends: 5254 [2022-03-03 20:08:34,664 INFO L226 Difference]: Without dead ends: 5224 [2022-03-03 20:08:34,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=457, Invalid=2849, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:08:34,665 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 206 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:34,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 274 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 706 Invalid, 0 Unknown, 433 Unchecked, 0.4s Time] [2022-03-03 20:08:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2022-03-03 20:08:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 3827. [2022-03-03 20:08:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 3.5888656560376373) internal successors, (13731), 3826 states have internal predecessors, (13731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 13731 transitions. [2022-03-03 20:08:34,740 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 13731 transitions. Word has length 26 [2022-03-03 20:08:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:34,740 INFO L470 AbstractCegarLoop]: Abstraction has 3827 states and 13731 transitions. [2022-03-03 20:08:34,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 13731 transitions. [2022-03-03 20:08:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:34,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:34,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:34,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-03 20:08:34,947 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 [2022-03-03 20:08:34,947 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:34,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1082352392, now seen corresponding path program 48 times [2022-03-03 20:08:34,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:34,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012874319] [2022-03-03 20:08:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:35,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:35,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012874319] [2022-03-03 20:08:35,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012874319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:35,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090255827] [2022-03-03 20:08:35,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:08:35,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:35,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:35,243 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:35,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 20:08:35,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:08:35,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:35,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:35,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:35,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:08:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:36,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:36,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:36,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 173 [2022-03-03 20:08:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:41,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090255827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:41,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:41,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:08:41,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642248074] [2022-03-03 20:08:41,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:41,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:08:41,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:08:41,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:08:41,591 INFO L87 Difference]: Start difference. First operand 3827 states and 13731 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:43,741 INFO L93 Difference]: Finished difference Result 5627 states and 19435 transitions. [2022-03-03 20:08:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 20:08:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:43,753 INFO L225 Difference]: With dead ends: 5627 [2022-03-03 20:08:43,753 INFO L226 Difference]: Without dead ends: 5582 [2022-03-03 20:08:43,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:08:43,753 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 194 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:43,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 174 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 521 Invalid, 0 Unknown, 208 Unchecked, 0.3s Time] [2022-03-03 20:08:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5582 states. [2022-03-03 20:08:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5582 to 3845. [2022-03-03 20:08:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 3.5926118626430803) internal successors, (13810), 3844 states have internal predecessors, (13810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 13810 transitions. [2022-03-03 20:08:43,828 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 13810 transitions. Word has length 26 [2022-03-03 20:08:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:43,828 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 13810 transitions. [2022-03-03 20:08:43,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 13810 transitions. [2022-03-03 20:08:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:43,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:43,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:43,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-03 20:08:44,034 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 [2022-03-03 20:08:44,034 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:44,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash 399059498, now seen corresponding path program 49 times [2022-03-03 20:08:44,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:44,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165052915] [2022-03-03 20:08:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:44,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:44,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:44,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165052915] [2022-03-03 20:08:44,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165052915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:44,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235718364] [2022-03-03 20:08:44,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:08:44,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:44,313 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:44,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 20:08:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:44,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:44,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:44,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:44,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:08:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:45,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:45,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:45,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:45,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-03-03 20:08:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:47,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235718364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:47,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:47,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:08:47,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902940206] [2022-03-03 20:08:47,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:47,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:08:47,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:08:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:08:47,442 INFO L87 Difference]: Start difference. First operand 3845 states and 13810 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:49,741 INFO L93 Difference]: Finished difference Result 6213 states and 21193 transitions. [2022-03-03 20:08:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 20:08:49,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:49,755 INFO L225 Difference]: With dead ends: 6213 [2022-03-03 20:08:49,756 INFO L226 Difference]: Without dead ends: 6183 [2022-03-03 20:08:49,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=549, Invalid=2313, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 20:08:49,756 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 292 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:49,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 267 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 719 Invalid, 0 Unknown, 177 Unchecked, 0.4s Time] [2022-03-03 20:08:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6183 states. [2022-03-03 20:08:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6183 to 3850. [2022-03-03 20:08:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3850 states, 3849 states have (on average 3.589763574954534) internal successors, (13817), 3849 states have internal predecessors, (13817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 13817 transitions. [2022-03-03 20:08:49,864 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 13817 transitions. Word has length 26 [2022-03-03 20:08:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:49,864 INFO L470 AbstractCegarLoop]: Abstraction has 3850 states and 13817 transitions. [2022-03-03 20:08:49,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 13817 transitions. [2022-03-03 20:08:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:49,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:49,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:49,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-03 20:08:50,071 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 [2022-03-03 20:08:50,071 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 50 times [2022-03-03 20:08:50,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:50,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199648303] [2022-03-03 20:08:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:50,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:50,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:50,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199648303] [2022-03-03 20:08:50,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199648303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:50,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081439198] [2022-03-03 20:08:50,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:08:50,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:50,332 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:50,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 20:08:50,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:08:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:50,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:50,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:50,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:50,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:08:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:51,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:51,419 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:08:51,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-03-03 20:08:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:54,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081439198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:54,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:54,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:08:54,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541346033] [2022-03-03 20:08:54,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:54,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:54,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:54,927 INFO L87 Difference]: Start difference. First operand 3850 states and 13817 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:58,434 INFO L93 Difference]: Finished difference Result 6286 states and 21454 transitions. [2022-03-03 20:08:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:08:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 20:08:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:58,448 INFO L225 Difference]: With dead ends: 6286 [2022-03-03 20:08:58,448 INFO L226 Difference]: Without dead ends: 6246 [2022-03-03 20:08:58,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=615, Invalid=3167, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 20:08:58,448 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 234 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:58,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 382 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:08:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2022-03-03 20:08:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 3863. [2022-03-03 20:08:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 3.5898498187467633) internal successors, (13864), 3862 states have internal predecessors, (13864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 13864 transitions. [2022-03-03 20:08:58,530 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 13864 transitions. Word has length 26 [2022-03-03 20:08:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:58,530 INFO L470 AbstractCegarLoop]: Abstraction has 3863 states and 13864 transitions. [2022-03-03 20:08:58,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 13864 transitions. [2022-03-03 20:08:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:58,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:58,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:58,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-03 20:08:58,737 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 [2022-03-03 20:08:58,738 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:58,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1075205646, now seen corresponding path program 51 times [2022-03-03 20:08:58,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:58,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165059824] [2022-03-03 20:08:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:58,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:59,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:59,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165059824] [2022-03-03 20:08:59,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165059824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:59,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322814163] [2022-03-03 20:08:59,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:08:59,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:59,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:59,026 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:59,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 20:08:59,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:08:59,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:08:59,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:59,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:59,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:08:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:59,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:00,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:00,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:00,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:09:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:02,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322814163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:02,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:02,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:09:02,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623991961] [2022-03-03 20:09:02,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:02,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:09:02,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:09:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:09:02,717 INFO L87 Difference]: Start difference. First operand 3863 states and 13864 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-03 20:09:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:05,204 INFO L93 Difference]: Finished difference Result 6091 states and 20727 transitions. [2022-03-03 20:09:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 20:09:05,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 26 [2022-03-03 20:09:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:05,218 INFO L225 Difference]: With dead ends: 6091 [2022-03-03 20:09:05,218 INFO L226 Difference]: Without dead ends: 6061 [2022-03-03 20:09:05,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 20:09:05,219 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 233 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:05,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 405 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 965 Invalid, 0 Unknown, 409 Unchecked, 0.5s Time] [2022-03-03 20:09:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2022-03-03 20:09:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 3867. [2022-03-03 20:09:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 3.588722193481635) internal successors, (13874), 3866 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 13874 transitions. [2022-03-03 20:09:05,317 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 13874 transitions. Word has length 26 [2022-03-03 20:09:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:05,317 INFO L470 AbstractCegarLoop]: Abstraction has 3867 states and 13874 transitions. [2022-03-03 20:09:05,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-03 20:09:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 13874 transitions. [2022-03-03 20:09:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:05,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:05,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:05,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-03 20:09:05,524 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 [2022-03-03 20:09:05,524 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 52 times [2022-03-03 20:09:05,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:05,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026712386] [2022-03-03 20:09:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:05,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:05,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026712386] [2022-03-03 20:09:05,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026712386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:05,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620189489] [2022-03-03 20:09:05,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:09:05,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:05,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:05,750 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:05,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 20:09:05,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:09:05,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:05,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:09:05,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:06,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:06,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:06,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:09:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:06,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:06,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:06,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:06,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 211 treesize of output 169 [2022-03-03 20:09:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:10,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620189489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:10,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:10,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:09:10,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763358966] [2022-03-03 20:09:10,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:10,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:09:10,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:09:10,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:09:10,617 INFO L87 Difference]: Start difference. First operand 3867 states and 13874 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:12,988 INFO L93 Difference]: Finished difference Result 5840 states and 19897 transitions. [2022-03-03 20:09:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 20:09:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:09:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:13,000 INFO L225 Difference]: With dead ends: 5840 [2022-03-03 20:09:13,000 INFO L226 Difference]: Without dead ends: 5780 [2022-03-03 20:09:13,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=2619, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:09:13,001 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 252 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:13,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 308 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 819 Invalid, 0 Unknown, 410 Unchecked, 0.5s Time] [2022-03-03 20:09:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2022-03-03 20:09:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 3945. [2022-03-03 20:09:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 3.591784989858012) internal successors, (14166), 3944 states have internal predecessors, (14166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 14166 transitions. [2022-03-03 20:09:13,093 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 14166 transitions. Word has length 26 [2022-03-03 20:09:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:13,093 INFO L470 AbstractCegarLoop]: Abstraction has 3945 states and 14166 transitions. [2022-03-03 20:09:13,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 14166 transitions. [2022-03-03 20:09:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:13,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:13,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:13,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:13,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:13,300 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1790993984, now seen corresponding path program 53 times [2022-03-03 20:09:13,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:13,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989003042] [2022-03-03 20:09:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:13,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:13,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989003042] [2022-03-03 20:09:13,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989003042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:13,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591226426] [2022-03-03 20:09:13,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:09:13,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:13,564 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:13,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 20:09:13,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:09:13,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:13,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:09:13,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:14,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:14,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:09:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:14,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:14,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:14,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:14,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:14,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 199 treesize of output 149 [2022-03-03 20:09:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:15,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591226426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:15,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:15,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:09:15,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016850467] [2022-03-03 20:09:15,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:15,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:15,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:15,715 INFO L87 Difference]: Start difference. First operand 3945 states and 14166 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:18,151 INFO L93 Difference]: Finished difference Result 9950 states and 34324 transitions. [2022-03-03 20:09:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:09:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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 26 [2022-03-03 20:09:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:18,172 INFO L225 Difference]: With dead ends: 9950 [2022-03-03 20:09:18,173 INFO L226 Difference]: Without dead ends: 9920 [2022-03-03 20:09:18,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=611, Invalid=3049, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:09:18,173 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 352 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:18,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 377 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 508 Invalid, 0 Unknown, 393 Unchecked, 0.3s Time] [2022-03-03 20:09:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9920 states. [2022-03-03 20:09:18,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9920 to 3951. [2022-03-03 20:09:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 3.5916455696202534) internal successors, (14187), 3950 states have internal predecessors, (14187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 14187 transitions. [2022-03-03 20:09:18,291 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 14187 transitions. Word has length 26 [2022-03-03 20:09:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:18,291 INFO L470 AbstractCegarLoop]: Abstraction has 3951 states and 14187 transitions. [2022-03-03 20:09:18,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 14187 transitions. [2022-03-03 20:09:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:18,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:18,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:18,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-03 20:09:18,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:18,497 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 635089588, now seen corresponding path program 54 times [2022-03-03 20:09:18,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:18,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850999319] [2022-03-03 20:09:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:18,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:18,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:18,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850999319] [2022-03-03 20:09:18,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850999319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:18,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108692864] [2022-03-03 20:09:18,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:09:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:18,740 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:18,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 20:09:18,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:09:18,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:18,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:18,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:19,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:19,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:19,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:09:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:19,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:19,793 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:09:19,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-03-03 20:09:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:22,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108692864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:22,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:22,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:09:22,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503516413] [2022-03-03 20:09:22,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:22,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:22,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:22,789 INFO L87 Difference]: Start difference. First operand 3951 states and 14187 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:24,788 INFO L93 Difference]: Finished difference Result 6153 states and 21030 transitions. [2022-03-03 20:09:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:09:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) 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 26 [2022-03-03 20:09:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:24,801 INFO L225 Difference]: With dead ends: 6153 [2022-03-03 20:09:24,801 INFO L226 Difference]: Without dead ends: 6108 [2022-03-03 20:09:24,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:09:24,801 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 193 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:24,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 368 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1416 Invalid, 0 Unknown, 145 Unchecked, 0.7s Time] [2022-03-03 20:09:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2022-03-03 20:09:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 3946. [2022-03-03 20:09:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 3.5921419518377693) internal successors, (14171), 3945 states have internal predecessors, (14171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 14171 transitions. [2022-03-03 20:09:24,880 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 14171 transitions. Word has length 26 [2022-03-03 20:09:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:24,881 INFO L470 AbstractCegarLoop]: Abstraction has 3946 states and 14171 transitions. [2022-03-03 20:09:24,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 14171 transitions. [2022-03-03 20:09:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:24,887 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:24,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:24,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:25,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-03 20:09:25,088 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1738126722, now seen corresponding path program 55 times [2022-03-03 20:09:25,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:25,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578335743] [2022-03-03 20:09:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:25,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:25,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:25,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578335743] [2022-03-03 20:09:25,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578335743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:25,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679692076] [2022-03-03 20:09:25,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:09:25,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:25,375 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:25,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 20:09:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:09:25,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:25,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:25,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:25,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:09:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:26,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:26,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:26,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:26,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-03-03 20:09:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:30,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679692076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:30,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:30,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:09:30,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490301063] [2022-03-03 20:09:30,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:30,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:09:30,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:09:30,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:09:30,169 INFO L87 Difference]: Start difference. First operand 3946 states and 14171 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-03 20:09:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:32,163 INFO L93 Difference]: Finished difference Result 6356 states and 21688 transitions. [2022-03-03 20:09:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:09:32,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 26 [2022-03-03 20:09:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:32,177 INFO L225 Difference]: With dead ends: 6356 [2022-03-03 20:09:32,178 INFO L226 Difference]: Without dead ends: 6326 [2022-03-03 20:09:32,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=444, Invalid=2106, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:09:32,178 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 312 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:32,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 217 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 644 Invalid, 0 Unknown, 326 Unchecked, 0.4s Time] [2022-03-03 20:09:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6326 states. [2022-03-03 20:09:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6326 to 3933. [2022-03-03 20:09:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3933 states, 3932 states have (on average 3.592319430315361) internal successors, (14125), 3932 states have internal predecessors, (14125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3933 states to 3933 states and 14125 transitions. [2022-03-03 20:09:32,262 INFO L78 Accepts]: Start accepts. Automaton has 3933 states and 14125 transitions. Word has length 26 [2022-03-03 20:09:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:32,263 INFO L470 AbstractCegarLoop]: Abstraction has 3933 states and 14125 transitions. [2022-03-03 20:09:32,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-03 20:09:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3933 states and 14125 transitions. [2022-03-03 20:09:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:32,269 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:32,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:32,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-03 20:09:32,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:32,470 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash 137082914, now seen corresponding path program 45 times [2022-03-03 20:09:32,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:32,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354986261] [2022-03-03 20:09:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:32,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:32,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:32,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354986261] [2022-03-03 20:09:32,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354986261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:32,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379698885] [2022-03-03 20:09:32,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:09:32,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:32,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:32,788 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:32,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 20:09:32,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:09:32,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:32,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:09:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:33,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:33,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:33,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:33,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:09:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:33,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:34,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:34,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:34,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:34,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:34,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-03-03 20:09:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:34,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379698885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:34,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:34,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:09:34,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266670865] [2022-03-03 20:09:34,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:34,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:09:34,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:09:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:09:34,386 INFO L87 Difference]: Start difference. First operand 3933 states and 14125 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:37,832 INFO L93 Difference]: Finished difference Result 7701 states and 25399 transitions. [2022-03-03 20:09:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:09:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 26 [2022-03-03 20:09:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:37,848 INFO L225 Difference]: With dead ends: 7701 [2022-03-03 20:09:37,848 INFO L226 Difference]: Without dead ends: 7620 [2022-03-03 20:09:37,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=966, Invalid=4584, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:09:37,849 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 436 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:37,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 488 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:09:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2022-03-03 20:09:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 4133. [2022-03-03 20:09:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4132 states have (on average 3.599709583736689) internal successors, (14874), 4132 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 14874 transitions. [2022-03-03 20:09:37,941 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 14874 transitions. Word has length 26 [2022-03-03 20:09:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:37,941 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 14874 transitions. [2022-03-03 20:09:37,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 14874 transitions. [2022-03-03 20:09:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:37,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:37,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:37,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-03 20:09:38,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-03 20:09:38,148 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 46 times [2022-03-03 20:09:38,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:38,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663540190] [2022-03-03 20:09:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:38,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:38,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:38,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663540190] [2022-03-03 20:09:38,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663540190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:38,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294797927] [2022-03-03 20:09:38,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:09:38,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:38,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:38,334 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:38,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 20:09:38,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:09:38,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:38,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:09:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:38,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:38,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:38,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:38,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:09:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:38,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:39,261 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:09:39,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:09:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:39,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294797927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:39,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:39,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-03 20:09:39,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640545242] [2022-03-03 20:09:39,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:39,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:09:39,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:09:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:09:39,834 INFO L87 Difference]: Start difference. First operand 4133 states and 14874 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:41,143 INFO L93 Difference]: Finished difference Result 5288 states and 18134 transitions. [2022-03-03 20:09:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:09:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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 26 [2022-03-03 20:09:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:41,155 INFO L225 Difference]: With dead ends: 5288 [2022-03-03 20:09:41,155 INFO L226 Difference]: Without dead ends: 5258 [2022-03-03 20:09:41,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:09:41,155 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 223 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:41,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 342 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:09:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2022-03-03 20:09:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 4153. [2022-03-03 20:09:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 3.598265895953757) internal successors, (14940), 4152 states have internal predecessors, (14940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 14940 transitions. [2022-03-03 20:09:41,229 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 14940 transitions. Word has length 26 [2022-03-03 20:09:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:41,229 INFO L470 AbstractCegarLoop]: Abstraction has 4153 states and 14940 transitions. [2022-03-03 20:09:41,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 14940 transitions. [2022-03-03 20:09:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:41,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:41,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:41,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-03 20:09:41,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-03 20:09:41,435 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:41,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 47 times [2022-03-03 20:09:41,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:41,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529786583] [2022-03-03 20:09:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:41,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:41,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:41,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529786583] [2022-03-03 20:09:41,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529786583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:41,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182854491] [2022-03-03 20:09:41,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:09:41,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:41,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:41,645 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:41,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-03 20:09:41,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:09:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:41,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:09:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:41,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:09:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:42,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:42,368 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:09:42,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-03-03 20:09:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:42,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182854491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:42,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:42,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-03 20:09:42,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943477094] [2022-03-03 20:09:42,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:42,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:09:42,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:42,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:09:42,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:09:42,980 INFO L87 Difference]: Start difference. First operand 4153 states and 14940 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:44,905 INFO L93 Difference]: Finished difference Result 5588 states and 19569 transitions. [2022-03-03 20:09:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 20:09:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 26 [2022-03-03 20:09:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:44,916 INFO L225 Difference]: With dead ends: 5588 [2022-03-03 20:09:44,917 INFO L226 Difference]: Without dead ends: 5516 [2022-03-03 20:09:44,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:09:44,917 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 217 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:44,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 278 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:09:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2022-03-03 20:09:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4167. [2022-03-03 20:09:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 4166 states have (on average 3.594575132021123) internal successors, (14975), 4166 states have internal predecessors, (14975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 14975 transitions. [2022-03-03 20:09:45,013 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 14975 transitions. Word has length 26 [2022-03-03 20:09:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:45,013 INFO L470 AbstractCegarLoop]: Abstraction has 4167 states and 14975 transitions. [2022-03-03 20:09:45,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 14975 transitions. [2022-03-03 20:09:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:45,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:45,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:45,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-03 20:09:45,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-03 20:09:45,220 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 48 times [2022-03-03 20:09:45,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:45,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504225538] [2022-03-03 20:09:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:45,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:45,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:45,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504225538] [2022-03-03 20:09:45,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504225538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:45,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962281675] [2022-03-03 20:09:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:09:45,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:45,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:45,447 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:45,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-03 20:09:45,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:09:45,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:45,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:45,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:45,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:09:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:45,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:46,229 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:09:46,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:09:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:46,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962281675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:46,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:46,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:09:46,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178704873] [2022-03-03 20:09:46,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:46,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:09:46,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:09:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:09:46,868 INFO L87 Difference]: Start difference. First operand 4167 states and 14975 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:48,019 INFO L93 Difference]: Finished difference Result 5603 states and 19631 transitions. [2022-03-03 20:09:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:09:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:09:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:48,031 INFO L225 Difference]: With dead ends: 5603 [2022-03-03 20:09:48,031 INFO L226 Difference]: Without dead ends: 5573 [2022-03-03 20:09:48,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:09:48,032 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 189 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:48,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 224 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:09:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2022-03-03 20:09:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 4185. [2022-03-03 20:09:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 4184 states have (on average 3.5946462715105163) internal successors, (15040), 4184 states have internal predecessors, (15040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 15040 transitions. [2022-03-03 20:09:48,107 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 15040 transitions. Word has length 26 [2022-03-03 20:09:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:48,107 INFO L470 AbstractCegarLoop]: Abstraction has 4185 states and 15040 transitions. [2022-03-03 20:09:48,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 15040 transitions. [2022-03-03 20:09:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:48,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:48,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:48,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-03 20:09:48,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:48,314 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 56 times [2022-03-03 20:09:48,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:48,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894686924] [2022-03-03 20:09:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:48,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:48,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:48,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894686924] [2022-03-03 20:09:48,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894686924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:48,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885881786] [2022-03-03 20:09:48,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:09:48,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:48,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:48,563 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:48,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-03 20:09:48,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:09:48,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:48,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:09:48,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:49,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:49,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:49,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:09:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:49,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:49,816 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:09:49,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:09:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:52,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885881786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:52,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:52,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:09:52,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905122032] [2022-03-03 20:09:52,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:52,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:52,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:52,843 INFO L87 Difference]: Start difference. First operand 4185 states and 15040 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:59,353 INFO L93 Difference]: Finished difference Result 7828 states and 26050 transitions. [2022-03-03 20:09:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 20:09:59,353 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-03-03 20:09:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:59,369 INFO L225 Difference]: With dead ends: 7828 [2022-03-03 20:09:59,369 INFO L226 Difference]: Without dead ends: 7783 [2022-03-03 20:09:59,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1197, Invalid=6635, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 20:09:59,370 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 487 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:59,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 509 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:09:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7783 states. [2022-03-03 20:09:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7783 to 4259. [2022-03-03 20:09:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 3.592062000939408) internal successors, (15295), 4258 states have internal predecessors, (15295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 15295 transitions. [2022-03-03 20:09:59,460 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 15295 transitions. Word has length 26 [2022-03-03 20:09:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:59,460 INFO L470 AbstractCegarLoop]: Abstraction has 4259 states and 15295 transitions. [2022-03-03 20:09:59,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 15295 transitions. [2022-03-03 20:09:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:59,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:59,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:59,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-03 20:09:59,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:59,667 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash 849972876, now seen corresponding path program 49 times [2022-03-03 20:09:59,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:59,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883266835] [2022-03-03 20:09:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:59,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:59,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:59,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883266835] [2022-03-03 20:09:59,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883266835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:59,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187799728] [2022-03-03 20:09:59,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:09:59,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:59,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:59,812 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:59,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-03 20:09:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:09:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:00,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:00,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:00,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:00,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:00,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:10:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:00,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:00,929 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:10:00,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 153 [2022-03-03 20:10:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:01,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187799728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:01,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:01,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-03 20:10:01,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7004724] [2022-03-03 20:10:01,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:01,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:10:01,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:10:01,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:10:01,368 INFO L87 Difference]: Start difference. First operand 4259 states and 15295 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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) Received shutdown request... [2022-03-03 20:10:01,463 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 20:10:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:10:01,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:10:01,464 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:01,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:10:01,465 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 20:10:01,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:01,481 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:10:01,491 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 [2022-03-03 20:10:01,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-03 20:10:01,666 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (4259states) and FLOYD_HOARE automaton (currently 5 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 56 for 55ms.. [2022-03-03 20:10:01,667 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 20:10:01,667 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 20:10:01,667 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 20:10:01,670 INFO L732 BasicCegarLoop]: Path program histogram: [56, 49, 1, 1, 1] [2022-03-03 20:10:01,672 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:10:01,672 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:10:01,674 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:10:01 BasicIcfg [2022-03-03 20:10:01,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:10:01,675 INFO L158 Benchmark]: Toolchain (without parser) took 717602.37ms. Allocated memory was 168.8MB in the beginning and 584.1MB in the end (delta: 415.2MB). Free memory was 128.3MB in the beginning and 174.8MB in the end (delta: -46.5MB). Peak memory consumption was 368.8MB. Max. memory is 8.0GB. [2022-03-03 20:10:01,675 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.16ms. Allocated memory is still 168.8MB. Free memory is still 129.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:10:01,675 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.50ms. Allocated memory is still 168.8MB. Free memory was 128.3MB in the beginning and 126.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:10:01,676 INFO L158 Benchmark]: Boogie Preprocessor took 12.69ms. Allocated memory is still 168.8MB. Free memory was 126.7MB in the beginning and 125.8MB in the end (delta: 909.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:10:01,676 INFO L158 Benchmark]: RCFGBuilder took 213.55ms. Allocated memory is still 168.8MB. Free memory was 125.6MB in the beginning and 116.4MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 20:10:01,676 INFO L158 Benchmark]: TraceAbstraction took 717349.87ms. Allocated memory was 168.8MB in the beginning and 584.1MB in the end (delta: 415.2MB). Free memory was 115.9MB in the beginning and 174.8MB in the end (delta: -58.9MB). Peak memory consumption was 357.3MB. Max. memory is 8.0GB. [2022-03-03 20:10:01,676 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 0.16ms. Allocated memory is still 168.8MB. Free memory is still 129.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.50ms. Allocated memory is still 168.8MB. Free memory was 128.3MB in the beginning and 126.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.69ms. Allocated memory is still 168.8MB. Free memory was 126.7MB in the beginning and 125.8MB in the end (delta: 909.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 213.55ms. Allocated memory is still 168.8MB. Free memory was 125.6MB in the beginning and 116.4MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 717349.87ms. Allocated memory was 168.8MB in the beginning and 584.1MB in the end (delta: 415.2MB). Free memory was 115.9MB in the beginning and 174.8MB in the end (delta: -58.9MB). Peak memory consumption was 357.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (4259states) and FLOYD_HOARE automaton (currently 5 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 56 for 55ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4259states) and FLOYD_HOARE automaton (currently 5 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 56 for 55ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4259states) and FLOYD_HOARE automaton (currently 5 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 56 for 55ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4259states) and FLOYD_HOARE automaton (currently 5 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 56 for 55ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 717.2s, OverallIterations: 108, TraceHistogramMax: 2, PathProgramHistogramMax: 56, EmptinessCheckTime: 0.5s, AutomataDifference: 419.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38944 SdHoareTripleChecker+Valid, 70.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38944 mSDsluCounter, 34709 SdHoareTripleChecker+Invalid, 60.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14690 IncrementalHoareTripleChecker+Unchecked, 61101 mSDsCounter, 7744 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 120014 IncrementalHoareTripleChecker+Invalid, 142448 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7744 mSolverCounterUnsat, 3076 mSDtfsCounter, 120014 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11237 GetRequests, 3926 SyntacticMatches, 251 SemanticMatches, 7059 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214743 ImplicationChecksByTransitivity, 379.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4259occurred in iteration=107, InterpolantAutomatonStates: 5719, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.4s AutomataMinimizationTime, 107 MinimizatonAttempts, 234161 StatesRemovedByMinimization, 107 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 265.4s InterpolantComputationTime, 5350 NumberOfCodeBlocks, 5344 NumberOfCodeBlocksAsserted, 334 NumberOfCheckSat, 7678 ConstructedInterpolants, 145 QuantifiedInterpolants, 177455 SizeOfPredicates, 1182 NumberOfNonLiveVariables, 6701 ConjunctsInSsa, 2046 ConjunctsInUnsatCore, 318 InterpolantComputations, 3 PerfectInterpolantSequences, 174/1808 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