/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/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:07:11,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:07:11,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:07:11,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:07:11,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:07:11,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:07:11,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:07:11,735 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 [2022-03-01 18:07:11,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:07:11,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:07:11,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:07:11,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:07:11,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:07:11,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:07:11,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:07:11,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:07:11,756 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:07:11,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:07:11,757 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:07:11,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:07:11,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:07:11,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:07:11,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:07:11,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:07:11,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:07:11,758 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:07:11,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:07:11,758 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:07:11,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:07:11,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:07:11,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:07:11,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:07:11,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:07:11,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:07:11,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:07:11,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:07:11,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:07:11,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:07:11,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:07:11,760 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:07:11,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:07:11,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:07:11,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:07:12,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:07:12,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:07:12,018 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:07:12,019 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:07:12,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2022-03-01 18:07:12,021 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2022-03-01 18:07:12,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:07:12,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:07:12,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:07:12,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:07:12,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:07:12,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,070 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:07:12,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:07:12,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:07:12,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:07:12,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:07:12,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:07:12,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:07:12,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:07:12,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:07:12,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/1) ... [2022-03-01 18:07:12,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:07:12,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:12,125 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) [2022-03-01 18:07:12,139 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 [2022-03-01 18:07:12,161 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:07:12,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:07:12,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:07:12,162 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:07:12,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:07:12,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:07:12,163 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:07:12,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:07:12,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:07:12,164 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:07:12,207 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:07:12,208 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:07:12,294 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:07:12,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:07:12,325 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-01 18:07:12,326 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-01 18:07:12,327 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-01 18:07:12,329 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:07:12 BoogieIcfgContainer [2022-03-01 18:07:12,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:07:12,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:07:12,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:07:12,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:07:12,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:07:12" (1/2) ... [2022-03-01 18:07:12,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c55b01 and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:07:12, skipping insertion in model container [2022-03-01 18:07:12,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:07:12" (2/2) ... [2022-03-01 18:07:12,341 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2022-03-01 18:07:12,351 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:07:12,351 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:07:12,351 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:07:12,351 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:07:12,395 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 18:07:12,449 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:07:12,458 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 [2022-03-01 18:07:12,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 18:07:12,481 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-03-01 18:07:12,498 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-01 18:07:12,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:12,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:12,511 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash 185268790, now seen corresponding path program 1 times [2022-03-01 18:07:12,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:12,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073567323] [2022-03-01 18:07:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:12,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:12,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:12,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073567323] [2022-03-01 18:07:12,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073567323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:07:12,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:07:12,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 18:07:12,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159979753] [2022-03-01 18:07:12,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:07:12,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:07:12,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:12,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:07:12,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:07:12,708 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:12,736 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2022-03-01 18:07:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:07:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-01 18:07:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:12,745 INFO L225 Difference]: With dead ends: 20 [2022-03-01 18:07:12,745 INFO L226 Difference]: Without dead ends: 16 [2022-03-01 18:07:12,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:07:12,765 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:12,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-01 18:07:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-01 18:07:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2022-03-01 18:07:12,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2022-03-01 18:07:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:12,812 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2022-03-01 18:07:12,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2022-03-01 18:07:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-01 18:07:12,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:12,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:12,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:07:12,817 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1471443425, now seen corresponding path program 1 times [2022-03-01 18:07:12,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:12,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802565871] [2022-03-01 18:07:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:12,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:12,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802565871] [2022-03-01 18:07:12,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802565871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:07:12,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:07:12,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 18:07:12,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99742035] [2022-03-01 18:07:12,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:07:12,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:07:12,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:12,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:07:12,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:07:12,886 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:12,909 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2022-03-01 18:07:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:07:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-01 18:07:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:12,923 INFO L225 Difference]: With dead ends: 21 [2022-03-01 18:07:12,924 INFO L226 Difference]: Without dead ends: 18 [2022-03-01 18:07:12,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:07:12,925 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:12,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-01 18:07:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-01 18:07:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2022-03-01 18:07:12,933 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2022-03-01 18:07:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:12,933 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2022-03-01 18:07:12,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2022-03-01 18:07:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 18:07:12,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:12,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:12,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:07:12,937 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:12,938 INFO L85 PathProgramCache]: Analyzing trace with hash 820973954, now seen corresponding path program 1 times [2022-03-01 18:07:12,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:12,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142050722] [2022-03-01 18:07:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:12,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:12,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:12,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142050722] [2022-03-01 18:07:12,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142050722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:12,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285802719] [2022-03-01 18:07:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:12,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:12,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:12,995 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) [2022-03-01 18:07:13,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:07:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:13,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:07:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:13,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:13,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:13,203 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:07:13,204 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 12 treesize of output 11 [2022-03-01 18:07:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:13,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285802719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:13,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:13,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 18:07:13,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232999653] [2022-03-01 18:07:13,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:13,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:07:13,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:13,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:07:13,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:07:13,215 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:13,260 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2022-03-01 18:07:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:07:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 18:07:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:13,263 INFO L225 Difference]: With dead ends: 25 [2022-03-01 18:07:13,264 INFO L226 Difference]: Without dead ends: 21 [2022-03-01 18:07:13,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:07:13,269 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:13,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-01 18:07:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-01 18:07:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2022-03-01 18:07:13,282 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2022-03-01 18:07:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:13,282 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2022-03-01 18:07:13,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2022-03-01 18:07:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 18:07:13,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:13,283 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:13,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:13,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:13,488 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash -296532971, now seen corresponding path program 2 times [2022-03-01 18:07:13,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:13,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484037599] [2022-03-01 18:07:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:13,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:13,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:13,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484037599] [2022-03-01 18:07:13,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484037599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:13,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375214132] [2022-03-01 18:07:13,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:13,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:13,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:13,542 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) [2022-03-01 18:07:13,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:07:13,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:13,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:13,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 18:07:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:13,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:13,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375214132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:13,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:13,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-03-01 18:07:13,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107059423] [2022-03-01 18:07:13,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:13,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:07:13,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:07:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:07:13,683 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:13,708 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2022-03-01 18:07:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:07:13,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 18:07:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:13,712 INFO L225 Difference]: With dead ends: 50 [2022-03-01 18:07:13,712 INFO L226 Difference]: Without dead ends: 45 [2022-03-01 18:07:13,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:07:13,714 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:13,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:13,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-01 18:07:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2022-03-01 18:07:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 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) [2022-03-01 18:07:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2022-03-01 18:07:13,721 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2022-03-01 18:07:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:13,721 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2022-03-01 18:07:13,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2022-03-01 18:07:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 18:07:13,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:13,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:13,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:13,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-01 18:07:13,952 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1667530614, now seen corresponding path program 3 times [2022-03-01 18:07:13,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:13,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958549619] [2022-03-01 18:07:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:14,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:14,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958549619] [2022-03-01 18:07:14,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958549619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:14,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202939224] [2022-03-01 18:07:14,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:14,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:14,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:14,029 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) [2022-03-01 18:07:14,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:07:14,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:07:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:07:14,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:14,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:14,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:14,181 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:14,182 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 14 treesize of output 13 [2022-03-01 18:07:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:14,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202939224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:14,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:14,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-03-01 18:07:14,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845345031] [2022-03-01 18:07:14,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:14,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:07:14,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:14,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:07:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:07:14,202 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:14,315 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2022-03-01 18:07:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:07:14,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 18:07:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:14,317 INFO L225 Difference]: With dead ends: 65 [2022-03-01 18:07:14,317 INFO L226 Difference]: Without dead ends: 39 [2022-03-01 18:07:14,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:07:14,319 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:14,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 45 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-01 18:07:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2022-03-01 18:07:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2022-03-01 18:07:14,336 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2022-03-01 18:07:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:14,336 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2022-03-01 18:07:14,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2022-03-01 18:07:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 18:07:14,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:14,337 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:14,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:14,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:14,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash 176919713, now seen corresponding path program 4 times [2022-03-01 18:07:14,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:14,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182315771] [2022-03-01 18:07:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:14,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:14,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:14,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182315771] [2022-03-01 18:07:14,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182315771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:14,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720152186] [2022-03-01 18:07:14,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:14,612 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) [2022-03-01 18:07:14,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:07:14,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:07:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:14,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:14,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720152186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:14,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:14,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:07:14,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144119180] [2022-03-01 18:07:14,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:14,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:07:14,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:07:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:07:14,761 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:14,795 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2022-03-01 18:07:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:07:14,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 18:07:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:14,799 INFO L225 Difference]: With dead ends: 73 [2022-03-01 18:07:14,799 INFO L226 Difference]: Without dead ends: 66 [2022-03-01 18:07:14,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:07:14,801 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:14,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-01 18:07:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2022-03-01 18:07:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2022-03-01 18:07:14,821 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2022-03-01 18:07:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:14,821 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2022-03-01 18:07:14,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2022-03-01 18:07:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 18:07:14,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:14,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:14,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:15,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:15,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2143585342, now seen corresponding path program 5 times [2022-03-01 18:07:15,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:15,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824477789] [2022-03-01 18:07:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:15,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:15,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:15,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824477789] [2022-03-01 18:07:15,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824477789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:15,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824538815] [2022-03-01 18:07:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:15,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:15,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:15,136 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) [2022-03-01 18:07:15,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:07:15,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:07:15,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:15,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:07:15,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:15,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:15,359 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 11 treesize of output 7 [2022-03-01 18:07:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:15,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:15,539 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:07:15,539 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 12 treesize of output 11 [2022-03-01 18:07:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:15,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824538815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:15,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:15,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:07:15,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605218030] [2022-03-01 18:07:15,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:15,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:07:15,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:07:15,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:07:15,569 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:15,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:15,839 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2022-03-01 18:07:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:07:15,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 18:07:15,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:15,841 INFO L225 Difference]: With dead ends: 128 [2022-03-01 18:07:15,841 INFO L226 Difference]: Without dead ends: 125 [2022-03-01 18:07:15,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:07:15,843 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:15,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-03-01 18:07:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-01 18:07:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2022-03-01 18:07:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.263157894736842) internal successors, (172), 76 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 172 transitions. [2022-03-01 18:07:15,867 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 172 transitions. Word has length 15 [2022-03-01 18:07:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:15,867 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 172 transitions. [2022-03-01 18:07:15,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 172 transitions. [2022-03-01 18:07:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 18:07:15,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:15,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:15,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:16,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:16,092 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:16,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1999694812, now seen corresponding path program 6 times [2022-03-01 18:07:16,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:16,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195029984] [2022-03-01 18:07:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:16,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:16,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195029984] [2022-03-01 18:07:16,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195029984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:16,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388241673] [2022-03-01 18:07:16,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:07:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:16,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:16,175 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) [2022-03-01 18:07:16,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:07:16,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:07:16,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:16,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:07:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:16,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:16,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:16,304 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:16,304 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 14 treesize of output 13 [2022-03-01 18:07:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:16,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388241673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:16,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:16,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-01 18:07:16,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471360722] [2022-03-01 18:07:16,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:16,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:07:16,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:07:16,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:07:16,325 INFO L87 Difference]: Start difference. First operand 77 states and 172 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:16,463 INFO L93 Difference]: Finished difference Result 152 states and 330 transitions. [2022-03-01 18:07:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:07:16,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 18:07:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:16,464 INFO L225 Difference]: With dead ends: 152 [2022-03-01 18:07:16,465 INFO L226 Difference]: Without dead ends: 111 [2022-03-01 18:07:16,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:07:16,465 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:16,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 77 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-01 18:07:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 65. [2022-03-01 18:07:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.28125) internal successors, (146), 64 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 146 transitions. [2022-03-01 18:07:16,471 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 146 transitions. Word has length 15 [2022-03-01 18:07:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:16,471 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 146 transitions. [2022-03-01 18:07:16,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 146 transitions. [2022-03-01 18:07:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 18:07:16,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:16,472 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:16,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:16,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:16,697 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1859667401, now seen corresponding path program 7 times [2022-03-01 18:07:16,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:16,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548793810] [2022-03-01 18:07:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:16,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:16,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548793810] [2022-03-01 18:07:16,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548793810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:16,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710012071] [2022-03-01 18:07:16,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:16,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:16,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:16,770 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) [2022-03-01 18:07:16,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:07:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:16,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 18:07:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:16,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:16,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710012071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:16,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:16,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:07:16,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335909503] [2022-03-01 18:07:16,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:16,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:07:16,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:16,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:07:16,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:07:16,884 INFO L87 Difference]: Start difference. First operand 65 states and 146 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:16,913 INFO L93 Difference]: Finished difference Result 153 states and 318 transitions. [2022-03-01 18:07:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:07:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 18:07:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:16,915 INFO L225 Difference]: With dead ends: 153 [2022-03-01 18:07:16,915 INFO L226 Difference]: Without dead ends: 140 [2022-03-01 18:07:16,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:07:16,915 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:16,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 37 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-01 18:07:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2022-03-01 18:07:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1979166666666665) internal successors, (211), 96 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 211 transitions. [2022-03-01 18:07:16,922 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 211 transitions. Word has length 16 [2022-03-01 18:07:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:16,922 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 211 transitions. [2022-03-01 18:07:16,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 211 transitions. [2022-03-01 18:07:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 18:07:16,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:16,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:16,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:17,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:17,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1374078134, now seen corresponding path program 8 times [2022-03-01 18:07:17,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:17,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508088860] [2022-03-01 18:07:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:17,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:17,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:17,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508088860] [2022-03-01 18:07:17,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508088860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:17,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104220637] [2022-03-01 18:07:17,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:17,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:17,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:17,255 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) [2022-03-01 18:07:17,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:07:17,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:17,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:17,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:07:17,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:17,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:17,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:17,386 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:17,387 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 14 treesize of output 13 [2022-03-01 18:07:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:17,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104220637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:17,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:17,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-03-01 18:07:17,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247108606] [2022-03-01 18:07:17,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:17,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:07:17,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:07:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:07:17,414 INFO L87 Difference]: Start difference. First operand 97 states and 211 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:17,606 INFO L93 Difference]: Finished difference Result 166 states and 328 transitions. [2022-03-01 18:07:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:07:17,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 18:07:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:17,607 INFO L225 Difference]: With dead ends: 166 [2022-03-01 18:07:17,607 INFO L226 Difference]: Without dead ends: 100 [2022-03-01 18:07:17,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:07:17,608 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:17,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 118 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-01 18:07:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 36. [2022-03-01 18:07:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 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) [2022-03-01 18:07:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2022-03-01 18:07:17,611 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2022-03-01 18:07:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:17,611 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2022-03-01 18:07:17,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2022-03-01 18:07:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:07:17,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:17,612 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:17,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:17,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-01 18:07:17,828 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -330172575, now seen corresponding path program 9 times [2022-03-01 18:07:17,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:17,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705244519] [2022-03-01 18:07:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:17,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:17,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705244519] [2022-03-01 18:07:17,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705244519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:17,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495170577] [2022-03-01 18:07:17,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:17,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:17,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:17,891 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) [2022-03-01 18:07:17,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:07:17,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:07:17,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:17,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 18:07:17,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:17,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:18,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495170577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:18,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:18,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 18:07:18,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884378159] [2022-03-01 18:07:18,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:18,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 18:07:18,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:18,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 18:07:18,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:07:18,019 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:18,051 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2022-03-01 18:07:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:07:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:07:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:18,052 INFO L225 Difference]: With dead ends: 128 [2022-03-01 18:07:18,052 INFO L226 Difference]: Without dead ends: 117 [2022-03-01 18:07:18,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:07:18,053 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:18,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 45 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-01 18:07:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2022-03-01 18:07:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2022-03-01 18:07:18,063 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2022-03-01 18:07:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:18,064 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2022-03-01 18:07:18,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2022-03-01 18:07:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:07:18,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:18,068 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:18,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:18,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:18,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1417189886, now seen corresponding path program 10 times [2022-03-01 18:07:18,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:18,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982972790] [2022-03-01 18:07:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:18,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:18,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982972790] [2022-03-01 18:07:18,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982972790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:18,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9790202] [2022-03-01 18:07:18,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:18,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:18,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:18,412 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) [2022-03-01 18:07:18,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:07:18,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:18,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:18,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 18:07:18,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:18,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:18,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:18,561 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:18,562 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 14 treesize of output 13 [2022-03-01 18:07:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:18,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9790202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:18,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:18,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-03-01 18:07:18,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46433047] [2022-03-01 18:07:18,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:18,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:07:18,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:07:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:07:18,598 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:18,887 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2022-03-01 18:07:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:07:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 18:07:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:18,888 INFO L225 Difference]: With dead ends: 179 [2022-03-01 18:07:18,888 INFO L226 Difference]: Without dead ends: 105 [2022-03-01 18:07:18,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:07:18,889 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:18,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 168 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:07:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-01 18:07:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2022-03-01 18:07:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-03-01 18:07:18,891 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2022-03-01 18:07:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:18,892 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-03-01 18:07:18,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:18,892 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-03-01 18:07:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:07:18,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:18,892 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:18,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:19,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-01 18:07:19,103 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash -960135275, now seen corresponding path program 11 times [2022-03-01 18:07:19,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:19,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502162185] [2022-03-01 18:07:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:19,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:19,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:19,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502162185] [2022-03-01 18:07:19,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502162185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:19,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444847988] [2022-03-01 18:07:19,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:19,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:19,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:19,172 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) [2022-03-01 18:07:19,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:07:19,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:07:19,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:19,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:07:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:19,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:19,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444847988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:19,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:19,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 18:07:19,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118559887] [2022-03-01 18:07:19,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:19,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:07:19,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:19,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:07:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:07:19,302 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:19,341 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2022-03-01 18:07:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:07:19,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:07:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:19,342 INFO L225 Difference]: With dead ends: 160 [2022-03-01 18:07:19,342 INFO L226 Difference]: Without dead ends: 147 [2022-03-01 18:07:19,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:07:19,343 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:19,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 53 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:19,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-01 18:07:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2022-03-01 18:07:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2022-03-01 18:07:19,347 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2022-03-01 18:07:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:19,348 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2022-03-01 18:07:19,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2022-03-01 18:07:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:07:19,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:19,349 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:19,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:19,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 18:07:19,563 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1906718218, now seen corresponding path program 12 times [2022-03-01 18:07:19,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:19,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769191279] [2022-03-01 18:07:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:19,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:19,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:19,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769191279] [2022-03-01 18:07:19,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769191279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:19,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956052273] [2022-03-01 18:07:19,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:07:19,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:19,751 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) [2022-03-01 18:07:19,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:07:19,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:07:19,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:07:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:19,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:19,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:19,888 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:19,889 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 14 treesize of output 13 [2022-03-01 18:07:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:19,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956052273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:19,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:19,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-03-01 18:07:19,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298099350] [2022-03-01 18:07:19,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:19,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:07:19,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:07:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:07:19,930 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:20,302 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2022-03-01 18:07:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:07:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:07:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:20,304 INFO L225 Difference]: With dead ends: 229 [2022-03-01 18:07:20,304 INFO L226 Difference]: Without dead ends: 135 [2022-03-01 18:07:20,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:07:20,305 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:20,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 227 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:07:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-01 18:07:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2022-03-01 18:07:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2022-03-01 18:07:20,307 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2022-03-01 18:07:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:20,308 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2022-03-01 18:07:20,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2022-03-01 18:07:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:07:20,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:20,308 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:20,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 18:07:20,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1044355617, now seen corresponding path program 13 times [2022-03-01 18:07:20,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:20,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057526602] [2022-03-01 18:07:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:20,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:20,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:20,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057526602] [2022-03-01 18:07:20,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057526602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:20,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177290676] [2022-03-01 18:07:20,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:20,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:20,604 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) [2022-03-01 18:07:20,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:07:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:07:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:20,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:20,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177290676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:20,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:20,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 18:07:20,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045615308] [2022-03-01 18:07:20,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:20,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:07:20,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:20,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:07:20,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:07:20,731 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:20,775 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2022-03-01 18:07:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:07:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:07:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:20,777 INFO L225 Difference]: With dead ends: 195 [2022-03-01 18:07:20,777 INFO L226 Difference]: Without dead ends: 180 [2022-03-01 18:07:20,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:07:20,780 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:20,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 52 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-01 18:07:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2022-03-01 18:07:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2022-03-01 18:07:20,785 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2022-03-01 18:07:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:20,785 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2022-03-01 18:07:20,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2022-03-01 18:07:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:07:20,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:20,787 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:20,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:20,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:07:20,992 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1911214146, now seen corresponding path program 14 times [2022-03-01 18:07:20,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:20,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887942211] [2022-03-01 18:07:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:20,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:21,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:21,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887942211] [2022-03-01 18:07:21,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887942211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:21,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156094008] [2022-03-01 18:07:21,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:21,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:21,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:21,201 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) [2022-03-01 18:07:21,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:07:21,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:21,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:07:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:21,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:21,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:21,352 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:21,352 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 14 treesize of output 13 [2022-03-01 18:07:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:21,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156094008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:21,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:21,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-03-01 18:07:21,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283788441] [2022-03-01 18:07:21,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:21,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:07:21,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:21,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:07:21,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:07:21,391 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:21,853 INFO L93 Difference]: Finished difference Result 285 states and 545 transitions. [2022-03-01 18:07:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:07:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:07:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:21,855 INFO L225 Difference]: With dead ends: 285 [2022-03-01 18:07:21,855 INFO L226 Difference]: Without dead ends: 169 [2022-03-01 18:07:21,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:07:21,856 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 184 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:21,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 295 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:07:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-01 18:07:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 51. [2022-03-01 18:07:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 96 transitions. [2022-03-01 18:07:21,859 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 96 transitions. Word has length 23 [2022-03-01 18:07:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:21,859 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 96 transitions. [2022-03-01 18:07:21,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 96 transitions. [2022-03-01 18:07:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:07:21,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:21,860 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:21,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:22,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:22,061 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash -858825387, now seen corresponding path program 15 times [2022-03-01 18:07:22,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:22,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898862555] [2022-03-01 18:07:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:22,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:22,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:22,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898862555] [2022-03-01 18:07:22,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898862555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:22,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902761361] [2022-03-01 18:07:22,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:22,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:22,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:22,152 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) [2022-03-01 18:07:22,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:07:22,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:07:22,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:22,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:07:22,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:22,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:22,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902761361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:22,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:22,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 18:07:22,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12407107] [2022-03-01 18:07:22,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:22,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:07:22,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:07:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:07:22,303 INFO L87 Difference]: Start difference. First operand 51 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:22,354 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2022-03-01 18:07:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:07:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:07:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:22,355 INFO L225 Difference]: With dead ends: 233 [2022-03-01 18:07:22,356 INFO L226 Difference]: Without dead ends: 216 [2022-03-01 18:07:22,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:07:22,356 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:22,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 60 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-01 18:07:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2022-03-01 18:07:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.095808383233533) internal successors, (350), 167 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 350 transitions. [2022-03-01 18:07:22,362 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 350 transitions. Word has length 24 [2022-03-01 18:07:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:22,362 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 350 transitions. [2022-03-01 18:07:22,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 350 transitions. [2022-03-01 18:07:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:07:22,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:22,363 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:22,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:22,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-01 18:07:22,580 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1031434442, now seen corresponding path program 16 times [2022-03-01 18:07:22,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:22,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846022431] [2022-03-01 18:07:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:22,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:22,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846022431] [2022-03-01 18:07:22,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846022431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:22,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067911387] [2022-03-01 18:07:22,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:22,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:22,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:22,820 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) [2022-03-01 18:07:22,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:07:22,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:22,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:07:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:22,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:22,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:23,006 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:23,007 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 14 treesize of output 13 [2022-03-01 18:07:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:23,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067911387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:23,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:23,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-03-01 18:07:23,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804889450] [2022-03-01 18:07:23,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:23,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:07:23,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:07:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:07:23,056 INFO L87 Difference]: Start difference. First operand 168 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:23,643 INFO L93 Difference]: Finished difference Result 347 states and 667 transitions. [2022-03-01 18:07:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:07:23,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:07:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:23,645 INFO L225 Difference]: With dead ends: 347 [2022-03-01 18:07:23,645 INFO L226 Difference]: Without dead ends: 207 [2022-03-01 18:07:23,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:07:23,646 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 226 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:23,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 372 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:07:23,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-01 18:07:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 56. [2022-03-01 18:07:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2022-03-01 18:07:23,650 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2022-03-01 18:07:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:23,650 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2022-03-01 18:07:23,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2022-03-01 18:07:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:07:23,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:23,651 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:23,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:23,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:07:23,876 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1886618399, now seen corresponding path program 17 times [2022-03-01 18:07:23,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:23,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236505997] [2022-03-01 18:07:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:23,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:23,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236505997] [2022-03-01 18:07:23,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236505997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:23,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279176406] [2022-03-01 18:07:23,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:23,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:23,960 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) [2022-03-01 18:07:23,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:07:23,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 18:07:23,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:23,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:07:23,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:24,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:24,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279176406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:24,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:24,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 18:07:24,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648920732] [2022-03-01 18:07:24,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:24,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:07:24,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:24,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:07:24,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:07:24,099 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:24,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:24,152 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2022-03-01 18:07:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:07:24,153 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:07:24,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:24,154 INFO L225 Difference]: With dead ends: 274 [2022-03-01 18:07:24,154 INFO L226 Difference]: Without dead ends: 255 [2022-03-01 18:07:24,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:07:24,155 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:24,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 70 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:07:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-01 18:07:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2022-03-01 18:07:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 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) [2022-03-01 18:07:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2022-03-01 18:07:24,165 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2022-03-01 18:07:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:24,165 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2022-03-01 18:07:24,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2022-03-01 18:07:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:07:24,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:24,167 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:24,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:24,391 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -260195710, now seen corresponding path program 18 times [2022-03-01 18:07:24,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:24,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896732075] [2022-03-01 18:07:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:24,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:24,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896732075] [2022-03-01 18:07:24,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896732075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:24,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492612314] [2022-03-01 18:07:24,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:07:24,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:24,686 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) [2022-03-01 18:07:24,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:07:24,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:07:24,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:07:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:24,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:24,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:24,882 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:24,882 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 14 treesize of output 13 [2022-03-01 18:07:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:24,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492612314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:24,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:24,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-03-01 18:07:24,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759891337] [2022-03-01 18:07:24,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:24,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:07:24,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:07:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:07:24,933 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:25,604 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2022-03-01 18:07:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:07:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:07:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:25,605 INFO L225 Difference]: With dead ends: 415 [2022-03-01 18:07:25,605 INFO L226 Difference]: Without dead ends: 249 [2022-03-01 18:07:25,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:07:25,606 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 272 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:25,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 458 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:07:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-01 18:07:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2022-03-01 18:07:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2022-03-01 18:07:25,609 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2022-03-01 18:07:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:25,610 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2022-03-01 18:07:25,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2022-03-01 18:07:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:07:25,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:25,611 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:25,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:25,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:25,822 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash 546945813, now seen corresponding path program 19 times [2022-03-01 18:07:25,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:25,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323668059] [2022-03-01 18:07:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:25,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:25,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:25,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323668059] [2022-03-01 18:07:25,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323668059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:25,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392074823] [2022-03-01 18:07:25,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:25,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:25,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:25,939 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) [2022-03-01 18:07:25,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:07:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:25,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:07:25,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:26,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:26,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392074823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:26,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:26,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-01 18:07:26,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426239332] [2022-03-01 18:07:26,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:26,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:07:26,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:26,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:07:26,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:07:26,100 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:26,166 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2022-03-01 18:07:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:07:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:07:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:26,167 INFO L225 Difference]: With dead ends: 318 [2022-03-01 18:07:26,168 INFO L226 Difference]: Without dead ends: 297 [2022-03-01 18:07:26,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:07:26,169 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:26,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 90 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-01 18:07:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2022-03-01 18:07:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2022-03-01 18:07:26,177 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2022-03-01 18:07:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:26,177 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2022-03-01 18:07:26,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2022-03-01 18:07:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:07:26,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:26,178 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:26,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:26,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:26,379 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 171054198, now seen corresponding path program 20 times [2022-03-01 18:07:26,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:26,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497750248] [2022-03-01 18:07:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:26,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:26,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:26,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497750248] [2022-03-01 18:07:26,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497750248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:26,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249051827] [2022-03-01 18:07:26,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:26,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:26,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:26,666 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) [2022-03-01 18:07:26,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:07:26,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:26,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:26,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:07:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:26,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:26,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:26,848 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:26,848 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 14 treesize of output 13 [2022-03-01 18:07:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:26,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249051827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:26,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:26,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-03-01 18:07:26,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214337831] [2022-03-01 18:07:26,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:26,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:07:26,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:26,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:07:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:07:26,904 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:27,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:27,739 INFO L93 Difference]: Finished difference Result 489 states and 947 transitions. [2022-03-01 18:07:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:07:27,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:07:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:27,741 INFO L225 Difference]: With dead ends: 489 [2022-03-01 18:07:27,741 INFO L226 Difference]: Without dead ends: 295 [2022-03-01 18:07:27,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:07:27,742 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 322 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:27,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 553 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:07:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-01 18:07:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 66. [2022-03-01 18:07:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2022-03-01 18:07:27,745 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 29 [2022-03-01 18:07:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:27,746 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2022-03-01 18:07:27,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2022-03-01 18:07:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:07:27,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:27,746 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:27,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:27,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-01 18:07:27,955 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1030791073, now seen corresponding path program 21 times [2022-03-01 18:07:27,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:27,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367523469] [2022-03-01 18:07:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:28,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:28,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367523469] [2022-03-01 18:07:28,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367523469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:28,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902771350] [2022-03-01 18:07:28,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:28,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:28,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:28,064 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) [2022-03-01 18:07:28,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:07:28,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 18:07:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:28,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:07:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:28,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:28,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902771350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:28,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:28,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-03-01 18:07:28,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694538926] [2022-03-01 18:07:28,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:28,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:07:28,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:07:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:07:28,245 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:28,313 INFO L93 Difference]: Finished difference Result 365 states and 685 transitions. [2022-03-01 18:07:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:07:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:07:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:28,315 INFO L225 Difference]: With dead ends: 365 [2022-03-01 18:07:28,315 INFO L226 Difference]: Without dead ends: 342 [2022-03-01 18:07:28,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:07:28,315 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:28,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 81 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-01 18:07:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 276. [2022-03-01 18:07:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.090909090909091) internal successors, (575), 275 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 575 transitions. [2022-03-01 18:07:28,322 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 575 transitions. Word has length 30 [2022-03-01 18:07:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:28,323 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 575 transitions. [2022-03-01 18:07:28,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 575 transitions. [2022-03-01 18:07:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:07:28,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:28,324 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:28,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:28,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-01 18:07:28,539 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:28,540 INFO L85 PathProgramCache]: Analyzing trace with hash 576201922, now seen corresponding path program 22 times [2022-03-01 18:07:28,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:28,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127382852] [2022-03-01 18:07:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:28,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:28,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:28,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127382852] [2022-03-01 18:07:28,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127382852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:28,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376347563] [2022-03-01 18:07:28,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:28,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:28,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:28,888 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) [2022-03-01 18:07:28,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:07:28,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:28,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-01 18:07:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:29,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:29,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:29,096 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:29,097 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 14 treesize of output 13 [2022-03-01 18:07:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:29,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376347563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:29,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:29,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-03-01 18:07:29,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821572207] [2022-03-01 18:07:29,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:29,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:07:29,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:07:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:07:29,155 INFO L87 Difference]: Start difference. First operand 276 states and 575 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:30,125 INFO L93 Difference]: Finished difference Result 569 states and 1105 transitions. [2022-03-01 18:07:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 18:07:30,125 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 18:07:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:30,126 INFO L225 Difference]: With dead ends: 569 [2022-03-01 18:07:30,126 INFO L226 Difference]: Without dead ends: 345 [2022-03-01 18:07:30,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:07:30,128 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 376 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:30,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 657 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:07:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-01 18:07:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 71. [2022-03-01 18:07:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2022-03-01 18:07:30,132 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2022-03-01 18:07:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:30,132 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2022-03-01 18:07:30,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2022-03-01 18:07:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:07:30,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:30,133 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:30,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-01 18:07:30,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:30,356 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:30,356 INFO L85 PathProgramCache]: Analyzing trace with hash 705468629, now seen corresponding path program 23 times [2022-03-01 18:07:30,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:30,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666790719] [2022-03-01 18:07:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:30,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:30,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:30,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666790719] [2022-03-01 18:07:30,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666790719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:30,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949060179] [2022-03-01 18:07:30,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:30,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:30,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:30,486 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) [2022-03-01 18:07:30,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:07:30,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 18:07:30,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:30,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:07:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:30,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:30,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949060179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:30,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:30,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-03-01 18:07:30,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586133822] [2022-03-01 18:07:30,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:30,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:07:30,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:30,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:07:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:07:30,672 INFO L87 Difference]: Start difference. First operand 71 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:30,749 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2022-03-01 18:07:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 18:07:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:07:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:30,751 INFO L225 Difference]: With dead ends: 415 [2022-03-01 18:07:30,751 INFO L226 Difference]: Without dead ends: 390 [2022-03-01 18:07:30,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:07:30,752 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 160 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:30,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 94 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-01 18:07:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2022-03-01 18:07:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.088328075709779) internal successors, (662), 317 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2022-03-01 18:07:30,764 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2022-03-01 18:07:30,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:30,764 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2022-03-01 18:07:30,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2022-03-01 18:07:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:07:30,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:30,765 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:30,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:30,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:30,979 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1931958710, now seen corresponding path program 24 times [2022-03-01 18:07:30,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:30,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399176566] [2022-03-01 18:07:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:31,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:31,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399176566] [2022-03-01 18:07:31,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399176566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:31,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817194516] [2022-03-01 18:07:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:07:31,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:31,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:31,354 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) [2022-03-01 18:07:31,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:07:31,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 18:07:31,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-01 18:07:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:31,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:31,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:31,564 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:31,564 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 14 treesize of output 13 [2022-03-01 18:07:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:31,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817194516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:31,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:31,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 26 [2022-03-01 18:07:31,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317718396] [2022-03-01 18:07:31,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:31,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:07:31,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:07:31,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:07:31,642 INFO L87 Difference]: Start difference. First operand 318 states and 662 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:32,728 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2022-03-01 18:07:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:07:32,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:07:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:32,730 INFO L225 Difference]: With dead ends: 655 [2022-03-01 18:07:32,730 INFO L226 Difference]: Without dead ends: 399 [2022-03-01 18:07:32,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 18:07:32,731 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 434 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:32,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 770 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:07:32,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-01 18:07:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2022-03-01 18:07:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 75 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2022-03-01 18:07:32,736 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2022-03-01 18:07:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:32,736 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2022-03-01 18:07:32,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2022-03-01 18:07:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:07:32,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:32,737 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:32,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:32,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-01 18:07:32,955 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash -215743903, now seen corresponding path program 25 times [2022-03-01 18:07:32,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:32,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592833769] [2022-03-01 18:07:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:32,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:33,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:33,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592833769] [2022-03-01 18:07:33,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592833769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:33,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030243304] [2022-03-01 18:07:33,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:33,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:33,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:33,082 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) [2022-03-01 18:07:33,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:07:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:07:33,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:33,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:33,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030243304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:33,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:33,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 15 [2022-03-01 18:07:33,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360602845] [2022-03-01 18:07:33,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:33,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:07:33,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:07:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:07:33,263 INFO L87 Difference]: Start difference. First operand 76 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2022-03-01 18:07:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:33,334 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2022-03-01 18:07:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:07:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 34 [2022-03-01 18:07:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:33,336 INFO L225 Difference]: With dead ends: 468 [2022-03-01 18:07:33,336 INFO L226 Difference]: Without dead ends: 441 [2022-03-01 18:07:33,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:07:33,336 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 162 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:33,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 109 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-03-01 18:07:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2022-03-01 18:07:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.085635359116022) internal successors, (755), 362 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2022-03-01 18:07:33,344 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2022-03-01 18:07:33,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:33,344 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2022-03-01 18:07:33,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2022-03-01 18:07:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2022-03-01 18:07:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:07:33,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:33,345 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:33,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:33,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 18:07:33,559 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1620184834, now seen corresponding path program 26 times [2022-03-01 18:07:33,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:33,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569727815] [2022-03-01 18:07:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:33,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:33,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:33,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569727815] [2022-03-01 18:07:33,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569727815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:33,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603512717] [2022-03-01 18:07:33,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:33,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:33,971 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) [2022-03-01 18:07:33,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:07:33,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:33,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:34,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-01 18:07:34,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:34,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:34,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:34,172 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:34,173 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 14 treesize of output 13 [2022-03-01 18:07:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:34,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603512717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:34,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:34,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 28 [2022-03-01 18:07:34,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384328396] [2022-03-01 18:07:34,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:34,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:07:34,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:07:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:07:34,237 INFO L87 Difference]: Start difference. First operand 363 states and 755 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:35,484 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2022-03-01 18:07:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:07:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:07:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:35,485 INFO L225 Difference]: With dead ends: 747 [2022-03-01 18:07:35,485 INFO L226 Difference]: Without dead ends: 457 [2022-03-01 18:07:35,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:07:35,486 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 496 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:35,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 892 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:07:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-01 18:07:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2022-03-01 18:07:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.95) internal successors, (156), 80 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2022-03-01 18:07:35,491 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2022-03-01 18:07:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:35,491 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2022-03-01 18:07:35,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2022-03-01 18:07:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 18:07:35,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:35,492 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:35,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:35,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 18:07:35,711 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:35,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1290799467, now seen corresponding path program 27 times [2022-03-01 18:07:35,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:35,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18966717] [2022-03-01 18:07:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:35,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:35,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:35,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18966717] [2022-03-01 18:07:35,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18966717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:35,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846224233] [2022-03-01 18:07:35,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:35,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:35,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:35,847 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) [2022-03-01 18:07:35,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:07:35,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 18:07:35,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:35,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:07:35,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:35,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:36,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846224233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:36,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:36,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-03-01 18:07:36,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593072244] [2022-03-01 18:07:36,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:36,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:07:36,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:07:36,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:07:36,024 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2022-03-01 18:07:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:36,098 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2022-03-01 18:07:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:07:36,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 36 [2022-03-01 18:07:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:36,100 INFO L225 Difference]: With dead ends: 524 [2022-03-01 18:07:36,100 INFO L226 Difference]: Without dead ends: 495 [2022-03-01 18:07:36,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:07:36,101 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 190 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:36,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 102 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-01 18:07:36,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2022-03-01 18:07:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0829268292682928) internal successors, (854), 410 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2022-03-01 18:07:36,109 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2022-03-01 18:07:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:36,110 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2022-03-01 18:07:36,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2022-03-01 18:07:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2022-03-01 18:07:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:07:36,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:36,111 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:36,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-01 18:07:36,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 18:07:36,327 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:36,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2100125430, now seen corresponding path program 28 times [2022-03-01 18:07:36,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:36,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654717632] [2022-03-01 18:07:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:36,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:36,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:36,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654717632] [2022-03-01 18:07:36,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654717632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:36,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053947223] [2022-03-01 18:07:36,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:36,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:36,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:36,787 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) [2022-03-01 18:07:36,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:07:36,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:36,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:36,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-01 18:07:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:36,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:36,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:36,988 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:36,988 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 14 treesize of output 13 [2022-03-01 18:07:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:37,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053947223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:37,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:37,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 30 [2022-03-01 18:07:37,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431629639] [2022-03-01 18:07:37,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:37,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:07:37,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:07:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:07:37,054 INFO L87 Difference]: Start difference. First operand 411 states and 854 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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) [2022-03-01 18:07:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:38,438 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2022-03-01 18:07:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:07:38,439 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 37 [2022-03-01 18:07:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:38,440 INFO L225 Difference]: With dead ends: 845 [2022-03-01 18:07:38,440 INFO L226 Difference]: Without dead ends: 519 [2022-03-01 18:07:38,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:07:38,442 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 562 mSDsluCounter, 2224 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:38,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1023 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:07:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-01 18:07:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2022-03-01 18:07:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2022-03-01 18:07:38,446 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2022-03-01 18:07:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:38,447 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2022-03-01 18:07:38,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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) [2022-03-01 18:07:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2022-03-01 18:07:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 18:07:38,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:38,447 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:38,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:38,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:38,671 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash 702457121, now seen corresponding path program 29 times [2022-03-01 18:07:38,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:38,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299232473] [2022-03-01 18:07:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:38,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:38,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299232473] [2022-03-01 18:07:38,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299232473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:38,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444148313] [2022-03-01 18:07:38,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:38,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:38,844 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) [2022-03-01 18:07:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:07:38,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 18:07:38,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-01 18:07:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:38,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:39,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444148313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:39,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:39,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 17 [2022-03-01 18:07:39,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250499639] [2022-03-01 18:07:39,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:39,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:07:39,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:07:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:07:39,065 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2022-03-01 18:07:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:39,137 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2022-03-01 18:07:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:07:39,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 38 [2022-03-01 18:07:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:39,139 INFO L225 Difference]: With dead ends: 583 [2022-03-01 18:07:39,139 INFO L226 Difference]: Without dead ends: 552 [2022-03-01 18:07:39,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:07:39,140 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:39,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 116 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-03-01 18:07:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2022-03-01 18:07:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2022-03-01 18:07:39,149 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2022-03-01 18:07:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:39,149 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2022-03-01 18:07:39,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2022-03-01 18:07:39,149 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2022-03-01 18:07:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:07:39,150 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:39,150 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:39,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 18:07:39,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:39,374 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash -498894526, now seen corresponding path program 30 times [2022-03-01 18:07:39,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:39,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240041060] [2022-03-01 18:07:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:39,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:39,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240041060] [2022-03-01 18:07:39,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240041060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:39,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16069441] [2022-03-01 18:07:39,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:07:39,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:39,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:39,997 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) [2022-03-01 18:07:39,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:07:40,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-01 18:07:40,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:40,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-01 18:07:40,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:40,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:40,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:40,209 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:40,209 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 14 treesize of output 13 [2022-03-01 18:07:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:40,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16069441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:40,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:40,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 32 [2022-03-01 18:07:40,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969302526] [2022-03-01 18:07:40,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:40,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:07:40,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:07:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:07:40,279 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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) [2022-03-01 18:07:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:41,936 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2022-03-01 18:07:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:07:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 39 [2022-03-01 18:07:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:41,939 INFO L225 Difference]: With dead ends: 949 [2022-03-01 18:07:41,939 INFO L226 Difference]: Without dead ends: 585 [2022-03-01 18:07:41,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 18:07:41,940 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 632 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:41,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 1163 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:07:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-01 18:07:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2022-03-01 18:07:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2022-03-01 18:07:41,944 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2022-03-01 18:07:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:41,945 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2022-03-01 18:07:41,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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) [2022-03-01 18:07:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2022-03-01 18:07:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 18:07:41,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:41,945 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:41,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:42,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-01 18:07:42,169 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1737217109, now seen corresponding path program 31 times [2022-03-01 18:07:42,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:42,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386003671] [2022-03-01 18:07:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:42,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:42,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:42,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386003671] [2022-03-01 18:07:42,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386003671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:42,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260007718] [2022-03-01 18:07:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:42,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:42,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:42,361 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) [2022-03-01 18:07:42,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:07:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:07:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:42,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:42,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260007718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:42,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:42,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 18 [2022-03-01 18:07:42,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192633003] [2022-03-01 18:07:42,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:42,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:07:42,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:07:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:07:42,583 INFO L87 Difference]: Start difference. First operand 91 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2022-03-01 18:07:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:42,662 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2022-03-01 18:07:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:07:42,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 40 [2022-03-01 18:07:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:42,665 INFO L225 Difference]: With dead ends: 645 [2022-03-01 18:07:42,665 INFO L226 Difference]: Without dead ends: 612 [2022-03-01 18:07:42,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:07:42,666 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 215 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:42,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 133 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-03-01 18:07:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2022-03-01 18:07:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2022-03-01 18:07:42,675 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2022-03-01 18:07:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:42,676 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2022-03-01 18:07:42,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2022-03-01 18:07:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2022-03-01 18:07:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 18:07:42,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:42,677 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:42,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:42,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:42,901 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:42,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1710480330, now seen corresponding path program 32 times [2022-03-01 18:07:42,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:42,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298398486] [2022-03-01 18:07:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:42,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:43,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:43,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298398486] [2022-03-01 18:07:43,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298398486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:43,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274123913] [2022-03-01 18:07:43,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:43,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:43,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:43,454 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) [2022-03-01 18:07:43,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:07:43,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:43,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:43,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-01 18:07:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:43,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:43,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:43,659 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:43,660 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 14 treesize of output 13 [2022-03-01 18:07:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:43,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274123913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:43,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:43,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 34 [2022-03-01 18:07:43,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715209793] [2022-03-01 18:07:43,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:43,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:07:43,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:43,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:07:43,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:07:43,732 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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) [2022-03-01 18:07:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:45,598 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2022-03-01 18:07:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:07:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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 41 [2022-03-01 18:07:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:45,601 INFO L225 Difference]: With dead ends: 1059 [2022-03-01 18:07:45,601 INFO L226 Difference]: Without dead ends: 655 [2022-03-01 18:07:45,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:07:45,602 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 706 mSDsluCounter, 2877 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:45,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 1312 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:07:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-01 18:07:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2022-03-01 18:07:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2022-03-01 18:07:45,606 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2022-03-01 18:07:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:45,606 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2022-03-01 18:07:45,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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) [2022-03-01 18:07:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2022-03-01 18:07:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:07:45,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:45,607 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:45,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:45,823 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1462204447, now seen corresponding path program 33 times [2022-03-01 18:07:45,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:45,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785717641] [2022-03-01 18:07:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:45,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:46,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:46,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785717641] [2022-03-01 18:07:46,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785717641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:46,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774611560] [2022-03-01 18:07:46,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:46,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:46,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:46,024 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) [2022-03-01 18:07:46,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:07:46,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-01 18:07:46,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:07:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:46,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:46,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774611560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:46,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:46,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 19 [2022-03-01 18:07:46,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830588453] [2022-03-01 18:07:46,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:46,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:07:46,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:07:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:07:46,246 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2022-03-01 18:07:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:46,345 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2022-03-01 18:07:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:07:46,345 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 42 [2022-03-01 18:07:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:46,348 INFO L225 Difference]: With dead ends: 710 [2022-03-01 18:07:46,348 INFO L226 Difference]: Without dead ends: 675 [2022-03-01 18:07:46,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:07:46,348 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 320 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:46,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 111 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-01 18:07:46,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2022-03-01 18:07:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2022-03-01 18:07:46,358 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2022-03-01 18:07:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:46,358 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2022-03-01 18:07:46,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2022-03-01 18:07:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2022-03-01 18:07:46,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-01 18:07:46,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:46,360 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:46,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:46,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-01 18:07:46,583 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1015309186, now seen corresponding path program 34 times [2022-03-01 18:07:46,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:46,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185449742] [2022-03-01 18:07:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:46,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:47,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:47,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185449742] [2022-03-01 18:07:47,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185449742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:47,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356279726] [2022-03-01 18:07:47,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:47,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:47,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:47,201 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) [2022-03-01 18:07:47,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:07:47,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:47,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:47,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-01 18:07:47,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:47,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:47,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:47,423 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:47,423 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 14 treesize of output 13 [2022-03-01 18:07:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:47,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356279726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:47,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:47,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 36 [2022-03-01 18:07:47,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408685454] [2022-03-01 18:07:47,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:47,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:07:47,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:47,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:07:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:07:47,498 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 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) [2022-03-01 18:07:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:49,594 INFO L93 Difference]: Finished difference Result 1175 states and 2305 transitions. [2022-03-01 18:07:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:07:49,594 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 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 43 [2022-03-01 18:07:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:49,596 INFO L225 Difference]: With dead ends: 1175 [2022-03-01 18:07:49,596 INFO L226 Difference]: Without dead ends: 729 [2022-03-01 18:07:49,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=751, Invalid=4219, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 18:07:49,598 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 784 mSDsluCounter, 3235 mSDsCounter, 0 mSdLazyCounter, 2832 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:49,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 1470 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2832 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 18:07:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-01 18:07:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 101. [2022-03-01 18:07:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.96) internal successors, (196), 100 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 196 transitions. [2022-03-01 18:07:49,602 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 196 transitions. Word has length 43 [2022-03-01 18:07:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:49,602 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 196 transitions. [2022-03-01 18:07:49,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 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) [2022-03-01 18:07:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 196 transitions. [2022-03-01 18:07:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:07:49,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:49,602 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:49,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 18:07:49,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-01 18:07:49,803 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1432891925, now seen corresponding path program 35 times [2022-03-01 18:07:49,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:49,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752994472] [2022-03-01 18:07:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:49,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:49,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:49,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752994472] [2022-03-01 18:07:49,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752994472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:49,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843314407] [2022-03-01 18:07:49,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:49,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:49,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:49,990 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) [2022-03-01 18:07:49,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:07:50,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-01 18:07:50,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-01 18:07:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:50,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:50,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843314407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:50,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:50,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 20 [2022-03-01 18:07:50,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947180393] [2022-03-01 18:07:50,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:50,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:07:50,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:50,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:07:50,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:07:50,207 INFO L87 Difference]: Start difference. First operand 101 states and 196 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2022-03-01 18:07:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:50,306 INFO L93 Difference]: Finished difference Result 778 states and 1490 transitions. [2022-03-01 18:07:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:07:50,306 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 44 [2022-03-01 18:07:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:50,308 INFO L225 Difference]: With dead ends: 778 [2022-03-01 18:07:50,308 INFO L226 Difference]: Without dead ends: 741 [2022-03-01 18:07:50,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:07:50,309 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 283 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:50,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 136 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-03-01 18:07:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 633. [2022-03-01 18:07:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.0727848101265822) internal successors, (1310), 632 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1310 transitions. [2022-03-01 18:07:50,319 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1310 transitions. Word has length 44 [2022-03-01 18:07:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:50,319 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1310 transitions. [2022-03-01 18:07:50,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2022-03-01 18:07:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1310 transitions. [2022-03-01 18:07:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-01 18:07:50,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:50,320 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:50,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-01 18:07:50,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:07:50,539 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1383356042, now seen corresponding path program 36 times [2022-03-01 18:07:50,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:50,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313048429] [2022-03-01 18:07:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:50,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:51,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:51,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313048429] [2022-03-01 18:07:51,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313048429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:51,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528262794] [2022-03-01 18:07:51,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:07:51,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:51,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:51,243 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) [2022-03-01 18:07:51,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:07:51,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-01 18:07:51,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-01 18:07:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:51,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:51,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:51,472 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:51,472 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 14 treesize of output 13 [2022-03-01 18:07:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:51,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528262794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:51,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:51,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 38 [2022-03-01 18:07:51,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520458870] [2022-03-01 18:07:51,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:51,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 18:07:51,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 18:07:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:07:51,560 INFO L87 Difference]: Start difference. First operand 633 states and 1310 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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) [2022-03-01 18:07:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:53,877 INFO L93 Difference]: Finished difference Result 1297 states and 2547 transitions. [2022-03-01 18:07:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:07:53,878 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 45 [2022-03-01 18:07:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:53,880 INFO L225 Difference]: With dead ends: 1297 [2022-03-01 18:07:53,880 INFO L226 Difference]: Without dead ends: 807 [2022-03-01 18:07:53,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:07:53,881 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 866 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 3160 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 3366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:53,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 1637 Invalid, 3366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3160 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:07:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-01 18:07:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 106. [2022-03-01 18:07:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 105 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2022-03-01 18:07:53,885 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2022-03-01 18:07:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:53,885 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2022-03-01 18:07:53,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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) [2022-03-01 18:07:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2022-03-01 18:07:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 18:07:53,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:53,886 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:53,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 18:07:54,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:54,086 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:54,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:54,087 INFO L85 PathProgramCache]: Analyzing trace with hash 88713889, now seen corresponding path program 37 times [2022-03-01 18:07:54,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:54,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763536856] [2022-03-01 18:07:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:54,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:54,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:54,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763536856] [2022-03-01 18:07:54,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763536856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:54,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104662369] [2022-03-01 18:07:54,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:54,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:54,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:54,328 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) [2022-03-01 18:07:54,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:07:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:07:54,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:54,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:54,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104662369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:54,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:54,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 21 [2022-03-01 18:07:54,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075004349] [2022-03-01 18:07:54,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:54,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:07:54,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:07:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:07:54,572 INFO L87 Difference]: Start difference. First operand 106 states and 206 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2022-03-01 18:07:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:54,668 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2022-03-01 18:07:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:07:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 46 [2022-03-01 18:07:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:54,670 INFO L225 Difference]: With dead ends: 849 [2022-03-01 18:07:54,670 INFO L226 Difference]: Without dead ends: 810 [2022-03-01 18:07:54,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:07:54,671 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 256 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:54,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 150 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-03-01 18:07:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2022-03-01 18:07:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.0705035971223023) internal successors, (1439), 695 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2022-03-01 18:07:54,683 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2022-03-01 18:07:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:54,683 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2022-03-01 18:07:54,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2022-03-01 18:07:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2022-03-01 18:07:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 18:07:54,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:54,684 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:54,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-01 18:07:54,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:07:54,891 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:54,892 INFO L85 PathProgramCache]: Analyzing trace with hash -496185918, now seen corresponding path program 38 times [2022-03-01 18:07:54,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:54,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405952117] [2022-03-01 18:07:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:54,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:55,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:55,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405952117] [2022-03-01 18:07:55,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405952117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:55,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732367900] [2022-03-01 18:07:55,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:55,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:55,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:55,612 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) [2022-03-01 18:07:55,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:07:55,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:55,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:55,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-01 18:07:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:55,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:07:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:55,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:55,845 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:07:55,846 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 14 treesize of output 13 [2022-03-01 18:07:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:55,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732367900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:55,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:55,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 40 [2022-03-01 18:07:55,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879172644] [2022-03-01 18:07:55,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:55,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:07:55,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:07:55,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:07:55,957 INFO L87 Difference]: Start difference. First operand 696 states and 1439 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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) [2022-03-01 18:07:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:58,588 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2022-03-01 18:07:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:07:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 47 [2022-03-01 18:07:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:58,592 INFO L225 Difference]: With dead ends: 1425 [2022-03-01 18:07:58,592 INFO L226 Difference]: Without dead ends: 889 [2022-03-01 18:07:58,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:07:58,594 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 952 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 3506 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:58,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 1813 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3506 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:07:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-03-01 18:07:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2022-03-01 18:07:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2022-03-01 18:07:58,600 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2022-03-01 18:07:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:58,600 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2022-03-01 18:07:58,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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) [2022-03-01 18:07:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2022-03-01 18:07:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-01 18:07:58,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:58,601 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:58,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:58,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:07:58,818 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1821183957, now seen corresponding path program 39 times [2022-03-01 18:07:58,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:58,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021410940] [2022-03-01 18:07:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:58,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:59,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:59,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021410940] [2022-03-01 18:07:59,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021410940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:59,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342619183] [2022-03-01 18:07:59,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:59,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:59,052 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) [2022-03-01 18:07:59,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:07:59,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-01 18:07:59,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:59,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-01 18:07:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:59,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:59,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342619183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:59,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:59,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 22 [2022-03-01 18:07:59,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784556087] [2022-03-01 18:07:59,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:59,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:07:59,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:07:59,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:07:59,269 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2022-03-01 18:07:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:59,367 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2022-03-01 18:07:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:07:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 48 [2022-03-01 18:07:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:59,370 INFO L225 Difference]: With dead ends: 923 [2022-03-01 18:07:59,370 INFO L226 Difference]: Without dead ends: 882 [2022-03-01 18:07:59,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:07:59,371 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 442 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:59,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 139 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:07:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-03-01 18:07:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2022-03-01 18:07:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2022-03-01 18:07:59,383 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2022-03-01 18:07:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:59,383 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2022-03-01 18:07:59,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2022-03-01 18:07:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2022-03-01 18:07:59,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-01 18:07:59,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:59,385 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:07:59,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:59,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:59,595 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:07:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1921782090, now seen corresponding path program 40 times [2022-03-01 18:07:59,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:59,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379022308] [2022-03-01 18:07:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:00,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:00,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379022308] [2022-03-01 18:08:00,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379022308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:00,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886784884] [2022-03-01 18:08:00,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:08:00,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:00,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:00,472 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) [2022-03-01 18:08:00,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:08:00,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:08:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:00,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-01 18:08:00,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:00,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:08:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:00,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:00,719 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:08:00,719 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 14 treesize of output 13 [2022-03-01 18:08:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:00,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886784884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:00,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:00,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-03-01 18:08:00,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132335349] [2022-03-01 18:08:00,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:00,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:08:00,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:00,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:08:00,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:08:00,838 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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) [2022-03-01 18:08:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:03,765 INFO L93 Difference]: Finished difference Result 1559 states and 3067 transitions. [2022-03-01 18:08:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:08:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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 49 [2022-03-01 18:08:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:03,771 INFO L225 Difference]: With dead ends: 1559 [2022-03-01 18:08:03,772 INFO L226 Difference]: Without dead ends: 975 [2022-03-01 18:08:03,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1003, Invalid=5803, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 18:08:03,773 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1042 mSDsluCounter, 4435 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:03,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1042 Valid, 1998 Invalid, 4119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:08:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-01 18:08:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 116. [2022-03-01 18:08:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 226 transitions. [2022-03-01 18:08:03,779 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 226 transitions. Word has length 49 [2022-03-01 18:08:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:03,780 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 226 transitions. [2022-03-01 18:08:03,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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) [2022-03-01 18:08:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 226 transitions. [2022-03-01 18:08:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 18:08:03,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:03,780 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:03,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 18:08:03,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-01 18:08:03,995 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:08:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash 577375585, now seen corresponding path program 41 times [2022-03-01 18:08:03,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:03,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525497644] [2022-03-01 18:08:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:03,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:04,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:04,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525497644] [2022-03-01 18:08:04,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525497644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:04,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336100955] [2022-03-01 18:08:04,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:08:04,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:04,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:04,276 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) [2022-03-01 18:08:04,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:08:04,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-01 18:08:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:08:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:04,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:04,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336100955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:04,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:04,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 23 [2022-03-01 18:08:04,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132614873] [2022-03-01 18:08:04,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:04,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:08:04,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:04,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:08:04,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:08:04,572 INFO L87 Difference]: Start difference. First operand 116 states and 226 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2022-03-01 18:08:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:04,704 INFO L93 Difference]: Finished difference Result 1000 states and 1925 transitions. [2022-03-01 18:08:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:08:04,704 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 50 [2022-03-01 18:08:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:04,708 INFO L225 Difference]: With dead ends: 1000 [2022-03-01 18:08:04,708 INFO L226 Difference]: Without dead ends: 957 [2022-03-01 18:08:04,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:08:04,709 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 322 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:04,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 158 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-01 18:08:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 831. [2022-03-01 18:08:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.066265060240964) internal successors, (1715), 830 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1715 transitions. [2022-03-01 18:08:04,722 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1715 transitions. Word has length 50 [2022-03-01 18:08:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:04,724 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1715 transitions. [2022-03-01 18:08:04,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2022-03-01 18:08:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1715 transitions. [2022-03-01 18:08:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-01 18:08:04,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:04,726 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:04,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:04,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:04,948 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:08:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1525368830, now seen corresponding path program 42 times [2022-03-01 18:08:04,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:04,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095673271] [2022-03-01 18:08:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:05,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:05,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095673271] [2022-03-01 18:08:05,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095673271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:05,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661827005] [2022-03-01 18:08:05,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:08:05,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:05,905 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) [2022-03-01 18:08:05,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:08:05,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-01 18:08:05,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-01 18:08:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:08,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:08,255 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 11 treesize of output 7 [2022-03-01 18:08:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 210 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:08,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:10,309 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:08:10,310 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 12 treesize of output 11 [2022-03-01 18:08:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 190 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:10,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661827005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:10,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:10,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 107 [2022-03-01 18:08:10,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796382595] [2022-03-01 18:08:10,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:10,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-01 18:08:10,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-01 18:08:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=9598, Unknown=0, NotChecked=0, Total=11556 [2022-03-01 18:08:10,374 INFO L87 Difference]: Start difference. First operand 831 states and 1715 transitions. Second operand has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:44,588 INFO L93 Difference]: Finished difference Result 23444 states and 61253 transitions. [2022-03-01 18:08:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 314 states. [2022-03-01 18:08:44,589 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-01 18:08:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:44,681 INFO L225 Difference]: With dead ends: 23444 [2022-03-01 18:08:44,681 INFO L226 Difference]: Without dead ends: 23424 [2022-03-01 18:08:44,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 304 SyntacticMatches, 39 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39693 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=39410, Invalid=118596, Unknown=0, NotChecked=0, Total=158006 [2022-03-01 18:08:44,697 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 2335 mSDsluCounter, 2333 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2335 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 5557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3753 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:44,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2335 Valid, 1733 Invalid, 5557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1500 Invalid, 0 Unknown, 3753 Unchecked, 0.6s Time] [2022-03-01 18:08:44,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23424 states. [2022-03-01 18:08:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23424 to 2912. [2022-03-01 18:08:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 2.737890759189282) internal successors, (7970), 2911 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7970 transitions. [2022-03-01 18:08:44,988 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7970 transitions. Word has length 51 [2022-03-01 18:08:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:44,988 INFO L470 AbstractCegarLoop]: Abstraction has 2912 states and 7970 transitions. [2022-03-01 18:08:44,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7970 transitions. [2022-03-01 18:08:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-01 18:08:44,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:44,995 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:45,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 18:08:45,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:45,196 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:08:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1381478300, now seen corresponding path program 43 times [2022-03-01 18:08:45,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:45,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714806529] [2022-03-01 18:08:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:46,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:46,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714806529] [2022-03-01 18:08:46,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714806529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:46,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9942345] [2022-03-01 18:08:46,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:08:46,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:46,136 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:46,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:08:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-01 18:08:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:46,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:08:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:46,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:46,390 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:08:46,390 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 14 treesize of output 13 [2022-03-01 18:08:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:46,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9942345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:46,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:46,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 44 [2022-03-01 18:08:46,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112962503] [2022-03-01 18:08:46,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:46,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:08:46,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:08:46,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:08:46,502 INFO L87 Difference]: Start difference. First operand 2912 states and 7970 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 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) [2022-03-01 18:08:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:49,866 INFO L93 Difference]: Finished difference Result 13727 states and 39493 transitions. [2022-03-01 18:08:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:08:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 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 51 [2022-03-01 18:08:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:49,908 INFO L225 Difference]: With dead ends: 13727 [2022-03-01 18:08:49,908 INFO L226 Difference]: Without dead ends: 13092 [2022-03-01 18:08:49,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2022-03-01 18:08:49,910 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1137 mSDsluCounter, 4877 mSDsCounter, 0 mSdLazyCounter, 4252 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 2192 SdHoareTripleChecker+Invalid, 4524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:49,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 2192 Invalid, 4524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4252 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 18:08:49,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13092 states. [2022-03-01 18:08:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13092 to 2284. [2022-03-01 18:08:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.924222514235655) internal successors, (6676), 2283 states have internal predecessors, (6676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6676 transitions. [2022-03-01 18:08:50,038 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6676 transitions. Word has length 51 [2022-03-01 18:08:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:50,038 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 6676 transitions. [2022-03-01 18:08:50,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 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) [2022-03-01 18:08:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6676 transitions. [2022-03-01 18:08:50,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-01 18:08:50,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:50,044 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:50,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:50,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-01 18:08:50,263 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:08:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:50,264 INFO L85 PathProgramCache]: Analyzing trace with hash 125175287, now seen corresponding path program 44 times [2022-03-01 18:08:50,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:50,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178853531] [2022-03-01 18:08:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:50,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:50,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:50,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178853531] [2022-03-01 18:08:50,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178853531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:50,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901511399] [2022-03-01 18:08:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:08:50,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:50,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:50,560 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) [2022-03-01 18:08:50,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:08:50,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:08:50,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 18:08:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:50,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:50,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901511399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:50,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:50,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 24 [2022-03-01 18:08:50,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660884642] [2022-03-01 18:08:50,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:50,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:08:50,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:50,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:08:50,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:08:50,792 INFO L87 Difference]: Start difference. First operand 2284 states and 6676 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2022-03-01 18:08:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:50,937 INFO L93 Difference]: Finished difference Result 12753 states and 36993 transitions. [2022-03-01 18:08:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:08:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 52 [2022-03-01 18:08:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:50,962 INFO L225 Difference]: With dead ends: 12753 [2022-03-01 18:08:50,962 INFO L226 Difference]: Without dead ends: 12686 [2022-03-01 18:08:50,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:08:50,963 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 300 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:50,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 185 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2022-03-01 18:08:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 1717. [2022-03-01 18:08:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 2.346736596736597) internal successors, (4027), 1716 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 4027 transitions. [2022-03-01 18:08:51,087 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 4027 transitions. Word has length 52 [2022-03-01 18:08:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:51,088 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 4027 transitions. [2022-03-01 18:08:51,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2022-03-01 18:08:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 4027 transitions. [2022-03-01 18:08:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 18:08:51,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:51,091 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:51,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:51,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-01 18:08:51,315 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:08:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2121468938, now seen corresponding path program 45 times [2022-03-01 18:08:51,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:51,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350464985] [2022-03-01 18:08:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:51,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:52,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:52,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350464985] [2022-03-01 18:08:52,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350464985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:52,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59641470] [2022-03-01 18:08:52,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:08:52,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:52,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:52,324 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) [2022-03-01 18:08:52,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:08:52,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-01 18:08:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-01 18:08:52,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:52,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:08:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:52,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:52,597 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:08:52,597 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 14 treesize of output 13 [2022-03-01 18:08:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:52,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59641470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:52,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:52,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 46 [2022-03-01 18:08:52,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275903649] [2022-03-01 18:08:52,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:52,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:08:52,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:08:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:08:52,700 INFO L87 Difference]: Start difference. First operand 1717 states and 4027 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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) [2022-03-01 18:08:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:56,316 INFO L93 Difference]: Finished difference Result 2659 states and 5800 transitions. [2022-03-01 18:08:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 18:08:56,317 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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 53 [2022-03-01 18:08:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:56,319 INFO L225 Difference]: With dead ends: 2659 [2022-03-01 18:08:56,319 INFO L226 Difference]: Without dead ends: 1720 [2022-03-01 18:08:56,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:08:56,323 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 1234 mSDsluCounter, 5340 mSDsCounter, 0 mSdLazyCounter, 4652 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 4948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 4652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:56,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 2395 Invalid, 4948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 4652 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:08:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2022-03-01 18:08:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 126. [2022-03-01 18:08:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2022-03-01 18:08:56,330 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2022-03-01 18:08:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:56,330 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2022-03-01 18:08:56,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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) [2022-03-01 18:08:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2022-03-01 18:08:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-01 18:08:56,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:56,331 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:56,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:56,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 18:08:56,543 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:08:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1317949407, now seen corresponding path program 46 times [2022-03-01 18:08:56,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:56,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292633346] [2022-03-01 18:08:56,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:56,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:56,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:56,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292633346] [2022-03-01 18:08:56,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292633346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:56,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110074773] [2022-03-01 18:08:56,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:08:56,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:56,875 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) [2022-03-01 18:08:56,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:08:56,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:08:56,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-01 18:08:56,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:57,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:57,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110074773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:57,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:57,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 25 [2022-03-01 18:08:57,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318671021] [2022-03-01 18:08:57,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:57,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:08:57,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:08:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:08:57,134 INFO L87 Difference]: Start difference. First operand 126 states and 246 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:57,253 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2022-03-01 18:08:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 18:08:57,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-03-01 18:08:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:57,254 INFO L225 Difference]: With dead ends: 1163 [2022-03-01 18:08:57,254 INFO L226 Difference]: Without dead ends: 1116 [2022-03-01 18:08:57,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:08:57,255 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 363 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:57,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 178 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-01 18:08:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2022-03-01 18:08:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2022-03-01 18:08:57,268 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2022-03-01 18:08:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:57,268 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2022-03-01 18:08:57,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2022-03-01 18:08:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-01 18:08:57,269 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:57,270 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:57,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:57,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:57,486 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:08:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 865346114, now seen corresponding path program 47 times [2022-03-01 18:08:57,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:57,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922659210] [2022-03-01 18:08:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:58,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:58,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922659210] [2022-03-01 18:08:58,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922659210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:58,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607253137] [2022-03-01 18:08:58,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:08:58,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:58,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:58,570 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) [2022-03-01 18:08:58,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:08:58,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-01 18:08:58,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-01 18:08:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:01,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:01,374 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 11 treesize of output 7 [2022-03-01 18:09:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 253 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:01,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:03,652 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:09:03,652 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 12 treesize of output 11 [2022-03-01 18:09:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 231 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:03,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607253137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:03,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:03,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 117 [2022-03-01 18:09:03,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706831428] [2022-03-01 18:09:03,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:03,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-01 18:09:03,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-01 18:09:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2328, Invalid=11478, Unknown=0, NotChecked=0, Total=13806 [2022-03-01 18:09:03,700 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:36,926 INFO L93 Difference]: Finished difference Result 31092 states and 79654 transitions. [2022-03-01 18:09:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 344 states. [2022-03-01 18:09:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-01 18:09:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:36,985 INFO L225 Difference]: With dead ends: 31092 [2022-03-01 18:09:36,986 INFO L226 Difference]: Without dead ends: 31070 [2022-03-01 18:09:36,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44354 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=42868, Invalid=146792, Unknown=0, NotChecked=0, Total=189660 [2022-03-01 18:09:36,992 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1991 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:36,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 1764 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 62 Unchecked, 0.0s Time] [2022-03-01 18:09:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31070 states. [2022-03-01 18:09:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31070 to 3434. [2022-03-01 18:09:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.7302650742790564) internal successors, (9373), 3433 states have internal predecessors, (9373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9373 transitions. [2022-03-01 18:09:37,231 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9373 transitions. Word has length 55 [2022-03-01 18:09:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:37,231 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 9373 transitions. [2022-03-01 18:09:37,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9373 transitions. [2022-03-01 18:09:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-01 18:09:37,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:37,239 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:37,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:37,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 18:09:37,463 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:09:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1009236644, now seen corresponding path program 48 times [2022-03-01 18:09:37,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:37,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2210289] [2022-03-01 18:09:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:37,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:38,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:38,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2210289] [2022-03-01 18:09:38,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2210289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:38,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042575144] [2022-03-01 18:09:38,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:09:38,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:38,595 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) [2022-03-01 18:09:38,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:09:38,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-01 18:09:38,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-01 18:09:38,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:38,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:09:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:38,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:38,907 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:09:38,907 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 14 treesize of output 13 [2022-03-01 18:09:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:39,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042575144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:39,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:39,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 48 [2022-03-01 18:09:39,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845047460] [2022-03-01 18:09:39,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:39,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:09:39,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:39,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:09:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:09:39,015 INFO L87 Difference]: Start difference. First operand 3434 states and 9373 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 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) [2022-03-01 18:09:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:42,975 INFO L93 Difference]: Finished difference Result 4736 states and 12391 transitions. [2022-03-01 18:09:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:09:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 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 55 [2022-03-01 18:09:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:42,982 INFO L225 Difference]: With dead ends: 4736 [2022-03-01 18:09:42,982 INFO L226 Difference]: Without dead ends: 3995 [2022-03-01 18:09:42,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 18:09:42,983 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1337 mSDsluCounter, 5824 mSDsCounter, 0 mSdLazyCounter, 5070 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 2607 SdHoareTripleChecker+Invalid, 5391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 5070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:42,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1337 Valid, 2607 Invalid, 5391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 5070 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 18:09:42,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2022-03-01 18:09:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 2842. [2022-03-01 18:09:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9489616332277366) internal successors, (8378), 2841 states have internal predecessors, (8378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8378 transitions. [2022-03-01 18:09:43,037 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8378 transitions. Word has length 55 [2022-03-01 18:09:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:43,037 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 8378 transitions. [2022-03-01 18:09:43,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 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) [2022-03-01 18:09:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8378 transitions. [2022-03-01 18:09:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-01 18:09:43,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:43,043 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:43,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:43,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 18:09:43,266 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:09:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1222894519, now seen corresponding path program 49 times [2022-03-01 18:09:43,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:43,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676527510] [2022-03-01 18:09:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:43,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:43,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:43,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676527510] [2022-03-01 18:09:43,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676527510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:43,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440180992] [2022-03-01 18:09:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:09:43,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:43,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:43,558 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) [2022-03-01 18:09:43,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:09:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:43,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-01 18:09:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:43,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:43,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440180992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:43,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:43,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 26 [2022-03-01 18:09:43,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719432927] [2022-03-01 18:09:43,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:43,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:09:43,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:43,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:09:43,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:09:43,810 INFO L87 Difference]: Start difference. First operand 2842 states and 8378 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 18:09:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:44,028 INFO L93 Difference]: Finished difference Result 17396 states and 50779 transitions. [2022-03-01 18:09:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:09:44,028 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 56 [2022-03-01 18:09:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:44,071 INFO L225 Difference]: With dead ends: 17396 [2022-03-01 18:09:44,072 INFO L226 Difference]: Without dead ends: 17323 [2022-03-01 18:09:44,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:09:44,072 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 471 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:44,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 167 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:09:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17323 states. [2022-03-01 18:09:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17323 to 1975. [2022-03-01 18:09:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 2.3541033434650456) internal successors, (4647), 1974 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 4647 transitions. [2022-03-01 18:09:44,228 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 4647 transitions. Word has length 56 [2022-03-01 18:09:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:44,228 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 4647 transitions. [2022-03-01 18:09:44,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 18:09:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 4647 transitions. [2022-03-01 18:09:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-01 18:09:44,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:44,231 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:44,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:44,446 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:09:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1013008074, now seen corresponding path program 50 times [2022-03-01 18:09:44,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:44,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406053508] [2022-03-01 18:09:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:45,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:45,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406053508] [2022-03-01 18:09:45,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406053508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:45,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475218625] [2022-03-01 18:09:45,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:09:45,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:45,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:45,618 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) [2022-03-01 18:09:45,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:09:45,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:09:45,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-01 18:09:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:45,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:09:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:45,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:45,890 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:09:45,890 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 14 treesize of output 13 [2022-03-01 18:09:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:45,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475218625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:45,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:45,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 50 [2022-03-01 18:09:45,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279304796] [2022-03-01 18:09:46,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:46,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-01 18:09:46,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:46,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-01 18:09:46,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 18:09:46,001 INFO L87 Difference]: Start difference. First operand 1975 states and 4647 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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) [2022-03-01 18:09:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:50,415 INFO L93 Difference]: Finished difference Result 3074 states and 6724 transitions. [2022-03-01 18:09:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:09:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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 57 [2022-03-01 18:09:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:50,418 INFO L225 Difference]: With dead ends: 3074 [2022-03-01 18:09:50,418 INFO L226 Difference]: Without dead ends: 1978 [2022-03-01 18:09:50,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 18:09:50,420 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1442 mSDsluCounter, 6329 mSDsCounter, 0 mSdLazyCounter, 5506 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 5853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 5506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:50,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1442 Valid, 2828 Invalid, 5853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 5506 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 18:09:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-03-01 18:09:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 136. [2022-03-01 18:09:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 135 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2022-03-01 18:09:50,429 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2022-03-01 18:09:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:50,430 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2022-03-01 18:09:50,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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) [2022-03-01 18:09:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2022-03-01 18:09:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-01 18:09:50,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:50,430 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:50,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 18:09:50,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-01 18:09:50,631 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:09:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1315400991, now seen corresponding path program 51 times [2022-03-01 18:09:50,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:50,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201504511] [2022-03-01 18:09:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:50,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:50,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:50,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201504511] [2022-03-01 18:09:50,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201504511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:50,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241730734] [2022-03-01 18:09:50,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:09:50,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:50,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:50,981 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) [2022-03-01 18:09:50,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:09:51,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-03-01 18:09:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:51,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-01 18:09:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:51,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:51,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241730734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:51,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:51,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 27 [2022-03-01 18:09:51,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370488115] [2022-03-01 18:09:51,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:51,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:09:51,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:09:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:09:51,243 INFO L87 Difference]: Start difference. First operand 136 states and 266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:51,371 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2022-03-01 18:09:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:09:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-03-01 18:09:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:51,373 INFO L225 Difference]: With dead ends: 1338 [2022-03-01 18:09:51,373 INFO L226 Difference]: Without dead ends: 1287 [2022-03-01 18:09:51,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:09:51,373 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 539 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:51,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 162 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:09:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-03-01 18:09:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2022-03-01 18:09:51,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.0589788732394365) internal successors, (2339), 1136 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2022-03-01 18:09:51,384 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2022-03-01 18:09:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:51,385 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2022-03-01 18:09:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2022-03-01 18:09:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-01 18:09:51,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:51,387 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:51,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:51,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:51,610 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:09:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1694299006, now seen corresponding path program 52 times [2022-03-01 18:09:51,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:51,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614942091] [2022-03-01 18:09:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:51,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:52,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:52,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614942091] [2022-03-01 18:09:52,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614942091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:52,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010204830] [2022-03-01 18:09:52,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:09:52,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:52,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:52,877 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) [2022-03-01 18:09:52,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:09:52,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:09:52,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:52,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-01 18:09:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:53,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:09:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:53,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:53,176 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:09:53,176 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 14 treesize of output 13 [2022-03-01 18:09:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:53,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010204830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:53,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:53,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 52 [2022-03-01 18:09:53,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889172644] [2022-03-01 18:09:53,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:53,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:09:53,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:09:53,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:09:53,290 INFO L87 Difference]: Start difference. First operand 1137 states and 2339 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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) [2022-03-01 18:09:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:58,023 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2022-03-01 18:09:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:09:58,024 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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 59 [2022-03-01 18:09:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:58,026 INFO L225 Difference]: With dead ends: 2319 [2022-03-01 18:09:58,026 INFO L226 Difference]: Without dead ends: 1465 [2022-03-01 18:09:58,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 18:09:58,027 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1552 mSDsluCounter, 6855 mSDsCounter, 0 mSdLazyCounter, 5960 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 6334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 5960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:58,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 3058 Invalid, 6334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 5960 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 18:09:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-03-01 18:09:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2022-03-01 18:09:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2022-03-01 18:09:58,033 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2022-03-01 18:09:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:58,034 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2022-03-01 18:09:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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) [2022-03-01 18:09:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2022-03-01 18:09:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-01 18:09:58,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:58,034 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:58,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 18:09:58,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-01 18:09:58,235 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:09:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash -960583403, now seen corresponding path program 53 times [2022-03-01 18:09:58,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:58,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080726722] [2022-03-01 18:09:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:58,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:58,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080726722] [2022-03-01 18:09:58,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080726722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:58,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157198556] [2022-03-01 18:09:58,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:09:58,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:58,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:58,628 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) [2022-03-01 18:09:58,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:09:58,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-01 18:09:58,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:58,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-01 18:09:58,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:58,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:58,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157198556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:58,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:58,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 28 [2022-03-01 18:09:58,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309791311] [2022-03-01 18:09:58,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:58,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:09:58,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:09:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:09:58,938 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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) [2022-03-01 18:09:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:59,090 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2022-03-01 18:09:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:09:59,091 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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 60 [2022-03-01 18:09:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:59,092 INFO L225 Difference]: With dead ends: 1430 [2022-03-01 18:09:59,092 INFO L226 Difference]: Without dead ends: 1377 [2022-03-01 18:09:59,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:09:59,093 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 344 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:59,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 213 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:09:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-03-01 18:09:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2022-03-01 18:09:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2022-03-01 18:09:59,105 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2022-03-01 18:09:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:59,105 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2022-03-01 18:09:59,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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) [2022-03-01 18:09:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2022-03-01 18:09:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-01 18:09:59,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:59,106 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:59,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 18:09:59,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-01 18:09:59,307 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:09:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:59,307 INFO L85 PathProgramCache]: Analyzing trace with hash -9355658, now seen corresponding path program 54 times [2022-03-01 18:09:59,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:59,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532858204] [2022-03-01 18:09:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:59,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:00,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:00,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532858204] [2022-03-01 18:10:00,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532858204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:00,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363261976] [2022-03-01 18:10:00,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:10:00,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:00,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:00,568 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) [2022-03-01 18:10:00,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:10:00,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-01 18:10:00,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:00,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-01 18:10:00,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:00,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:10:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:00,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:00,870 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:10:00,870 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 14 treesize of output 13 [2022-03-01 18:10:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:00,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363261976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:00,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:00,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 54 [2022-03-01 18:10:00,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127761747] [2022-03-01 18:10:00,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:00,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 18:10:00,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 18:10:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:10:00,985 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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) [2022-03-01 18:10:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:06,137 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2022-03-01 18:10:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:10:06,137 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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 61 [2022-03-01 18:10:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:06,139 INFO L225 Difference]: With dead ends: 2489 [2022-03-01 18:10:06,139 INFO L226 Difference]: Without dead ends: 1575 [2022-03-01 18:10:06,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2022-03-01 18:10:06,140 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1666 mSDsluCounter, 7402 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 3297 SdHoareTripleChecker+Invalid, 6834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:06,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1666 Valid, 3297 Invalid, 6834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 18:10:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-03-01 18:10:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2022-03-01 18:10:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2022-03-01 18:10:06,148 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2022-03-01 18:10:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:06,149 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2022-03-01 18:10:06,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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) [2022-03-01 18:10:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2022-03-01 18:10:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-01 18:10:06,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:06,149 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:06,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:06,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:06,364 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:10:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash -266947167, now seen corresponding path program 55 times [2022-03-01 18:10:06,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:06,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705032184] [2022-03-01 18:10:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:06,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:06,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705032184] [2022-03-01 18:10:06,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705032184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:06,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890959920] [2022-03-01 18:10:06,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:10:06,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:06,730 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) [2022-03-01 18:10:06,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:10:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:06,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-01 18:10:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:06,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:06,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890959920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:06,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:06,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 29 [2022-03-01 18:10:06,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795004260] [2022-03-01 18:10:06,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:06,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:10:06,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:10:06,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:10:06,987 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-01 18:10:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:07,129 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2022-03-01 18:10:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:10:07,130 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 62 [2022-03-01 18:10:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:07,132 INFO L225 Difference]: With dead ends: 1525 [2022-03-01 18:10:07,132 INFO L226 Difference]: Without dead ends: 1470 [2022-03-01 18:10:07,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:10:07,133 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 471 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:07,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 201 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:10:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-01 18:10:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2022-03-01 18:10:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2022-03-01 18:10:07,146 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2022-03-01 18:10:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:07,146 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2022-03-01 18:10:07,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-01 18:10:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2022-03-01 18:10:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-01 18:10:07,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:07,148 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:07,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:07,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:07,366 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:10:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash -965118270, now seen corresponding path program 56 times [2022-03-01 18:10:07,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:07,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823383992] [2022-03-01 18:10:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:07,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:08,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:08,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823383992] [2022-03-01 18:10:08,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823383992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:08,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720658199] [2022-03-01 18:10:08,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:10:08,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:08,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:08,685 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) [2022-03-01 18:10:08,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:10:08,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:10:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-01 18:10:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:08,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:10:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:08,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:08,984 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:10:08,985 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 14 treesize of output 13 [2022-03-01 18:10:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:09,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720658199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:09,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:09,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 56 [2022-03-01 18:10:09,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507502718] [2022-03-01 18:10:09,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:09,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-01 18:10:09,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-01 18:10:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:10:09,108 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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) [2022-03-01 18:10:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:14,656 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2022-03-01 18:10:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:10:14,656 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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 63 [2022-03-01 18:10:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:14,658 INFO L225 Difference]: With dead ends: 2665 [2022-03-01 18:10:14,658 INFO L226 Difference]: Without dead ends: 1689 [2022-03-01 18:10:14,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:10:14,659 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1784 mSDsluCounter, 7970 mSDsCounter, 0 mSdLazyCounter, 6922 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 3545 SdHoareTripleChecker+Invalid, 7353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 6922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:14,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1784 Valid, 3545 Invalid, 7353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 6922 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 18:10:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-03-01 18:10:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2022-03-01 18:10:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2022-03-01 18:10:14,668 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2022-03-01 18:10:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:14,668 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2022-03-01 18:10:14,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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) [2022-03-01 18:10:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2022-03-01 18:10:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-01 18:10:14,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:14,669 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:14,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:14,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:14,892 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:10:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash 169182933, now seen corresponding path program 57 times [2022-03-01 18:10:14,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:14,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51370666] [2022-03-01 18:10:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:14,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:15,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:15,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51370666] [2022-03-01 18:10:15,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51370666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:15,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233902613] [2022-03-01 18:10:15,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:10:15,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:15,309 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) [2022-03-01 18:10:15,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:10:15,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-01 18:10:15,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:15,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-01 18:10:15,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:15,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:15,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233902613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:15,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:15,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 30 [2022-03-01 18:10:15,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467557564] [2022-03-01 18:10:15,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:15,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:10:15,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:10:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:10:15,643 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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) [2022-03-01 18:10:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:15,805 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2022-03-01 18:10:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:10:15,805 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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 64 [2022-03-01 18:10:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:15,807 INFO L225 Difference]: With dead ends: 1623 [2022-03-01 18:10:15,807 INFO L226 Difference]: Without dead ends: 1566 [2022-03-01 18:10:15,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:10:15,808 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 486 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:15,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 256 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:10:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-03-01 18:10:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2022-03-01 18:10:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2022-03-01 18:10:15,823 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2022-03-01 18:10:15,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:15,823 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2022-03-01 18:10:15,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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) [2022-03-01 18:10:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2022-03-01 18:10:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-01 18:10:15,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:15,825 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:15,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:16,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 18:10:16,043 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:10:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash -758348874, now seen corresponding path program 58 times [2022-03-01 18:10:16,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:16,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717715214] [2022-03-01 18:10:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:16,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:17,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:17,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717715214] [2022-03-01 18:10:17,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717715214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:17,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91066751] [2022-03-01 18:10:17,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:10:17,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:17,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:17,432 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) [2022-03-01 18:10:17,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:10:17,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:10:17,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:17,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-01 18:10:17,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:17,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:10:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:17,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:17,741 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:10:17,741 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 14 treesize of output 13 [2022-03-01 18:10:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:17,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91066751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:17,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:17,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 58 [2022-03-01 18:10:17,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946599867] [2022-03-01 18:10:17,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:17,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-01 18:10:17,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:17,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-01 18:10:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:10:17,865 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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) [2022-03-01 18:10:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:23,861 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2022-03-01 18:10:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:10:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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 65 [2022-03-01 18:10:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:23,864 INFO L225 Difference]: With dead ends: 2847 [2022-03-01 18:10:23,864 INFO L226 Difference]: Without dead ends: 1807 [2022-03-01 18:10:23,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2022-03-01 18:10:23,866 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1906 mSDsluCounter, 8559 mSDsCounter, 0 mSdLazyCounter, 7430 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 7891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 7430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:23,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 3802 Invalid, 7891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 7430 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-01 18:10:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-03-01 18:10:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2022-03-01 18:10:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2022-03-01 18:10:23,874 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2022-03-01 18:10:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:23,874 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2022-03-01 18:10:23,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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) [2022-03-01 18:10:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2022-03-01 18:10:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-01 18:10:23,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:23,875 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:23,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:24,075 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,SelfDestructingSolverStorable59 [2022-03-01 18:10:24,075 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:10:24,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2010900383, now seen corresponding path program 59 times [2022-03-01 18:10:24,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:24,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017761701] [2022-03-01 18:10:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:24,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:24,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:24,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017761701] [2022-03-01 18:10:24,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017761701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:24,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764150877] [2022-03-01 18:10:24,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:10:24,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:24,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:24,532 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) [2022-03-01 18:10:24,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 18:10:24,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-01 18:10:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:24,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-01 18:10:24,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:24,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:24,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764150877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:24,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:24,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 31 [2022-03-01 18:10:24,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688738595] [2022-03-01 18:10:24,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:24,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:10:24,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:24,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:10:24,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:10:24,844 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2022-03-01 18:10:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:25,000 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2022-03-01 18:10:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:10:25,001 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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 66 [2022-03-01 18:10:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:25,003 INFO L225 Difference]: With dead ends: 1724 [2022-03-01 18:10:25,003 INFO L226 Difference]: Without dead ends: 1665 [2022-03-01 18:10:25,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:10:25,004 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 552 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:25,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 213 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:10:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-03-01 18:10:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2022-03-01 18:10:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2022-03-01 18:10:25,023 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2022-03-01 18:10:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:25,023 INFO L470 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2022-03-01 18:10:25,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2022-03-01 18:10:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2022-03-01 18:10:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-01 18:10:25,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:25,025 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:25,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 18:10:25,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:25,243 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:10:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -15769342, now seen corresponding path program 60 times [2022-03-01 18:10:25,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:25,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830312372] [2022-03-01 18:10:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:26,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:26,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830312372] [2022-03-01 18:10:26,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830312372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:26,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585568622] [2022-03-01 18:10:26,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:10:26,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:26,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:26,745 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) [2022-03-01 18:10:26,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 18:10:26,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-01 18:10:26,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:26,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-01 18:10:26,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:30,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:30,908 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 11 treesize of output 7 [2022-03-01 18:10:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 406 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:30,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:34,459 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:10:34,459 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 12 treesize of output 11 [2022-03-01 18:10:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 378 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:34,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585568622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:34,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:34,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 147 [2022-03-01 18:10:34,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367376904] [2022-03-01 18:10:34,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:34,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-03-01 18:10:34,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-03-01 18:10:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3630, Invalid=18126, Unknown=0, NotChecked=0, Total=21756 [2022-03-01 18:10:34,518 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 148 states, 148 states have (on average 1.087837837837838) internal successors, (161), 147 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:34,569 INFO L93 Difference]: Finished difference Result 12289 states and 29363 transitions. [2022-03-01 18:12:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 551 states. [2022-03-01 18:12:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.087837837837838) internal successors, (161), 147 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-03-01 18:12:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:34,586 INFO L225 Difference]: With dead ends: 12289 [2022-03-01 18:12:34,586 INFO L226 Difference]: Without dead ends: 12201 [2022-03-01 18:12:34,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1273 GetRequests, 534 SyntacticMatches, 74 SemanticMatches, 665 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 119086 ImplicationChecksByTransitivity, 77.6s TimeCoverageRelationStatistics Valid=115543, Invalid=328679, Unknown=0, NotChecked=0, Total=444222 [2022-03-01 18:12:34,608 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 4729 mSDsluCounter, 7518 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4729 SdHoareTripleChecker+Valid, 6478 SdHoareTripleChecker+Invalid, 7947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4462 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:34,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4729 Valid, 6478 Invalid, 7947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 2912 Invalid, 0 Unknown, 4462 Unchecked, 1.1s Time] [2022-03-01 18:12:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12201 states. [2022-03-01 18:12:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12201 to 6563. [2022-03-01 18:12:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6563 states, 6562 states have (on average 2.7796403535507466) internal successors, (18240), 6562 states have internal predecessors, (18240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6563 states to 6563 states and 18240 transitions. [2022-03-01 18:12:34,750 INFO L78 Accepts]: Start accepts. Automaton has 6563 states and 18240 transitions. Word has length 67 [2022-03-01 18:12:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:34,750 INFO L470 AbstractCegarLoop]: Abstraction has 6563 states and 18240 transitions. [2022-03-01 18:12:34,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.087837837837838) internal successors, (161), 147 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 6563 states and 18240 transitions. [2022-03-01 18:12:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-01 18:12:34,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:34,806 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:34,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-01 18:12:35,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:35,007 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:12:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:35,007 INFO L85 PathProgramCache]: Analyzing trace with hash 128121188, now seen corresponding path program 61 times [2022-03-01 18:12:35,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:35,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326555136] [2022-03-01 18:12:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:35,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:36,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:36,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326555136] [2022-03-01 18:12:36,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326555136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:36,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041674578] [2022-03-01 18:12:36,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:12:36,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:36,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:36,501 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) [2022-03-01 18:12:36,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 18:12:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:36,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-01 18:12:36,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:36,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:12:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:36,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:36,869 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:12:36,869 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 14 treesize of output 13 [2022-03-01 18:12:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:37,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041674578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:37,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:37,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 60 [2022-03-01 18:12:37,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803387139] [2022-03-01 18:12:37,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:37,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-01 18:12:37,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:37,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-01 18:12:37,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:12:37,016 INFO L87 Difference]: Start difference. First operand 6563 states and 18240 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 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) [2022-03-01 18:12:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:43,704 INFO L93 Difference]: Finished difference Result 41199 states and 120567 transitions. [2022-03-01 18:12:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 18:12:43,704 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 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 67 [2022-03-01 18:12:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:43,788 INFO L225 Difference]: With dead ends: 41199 [2022-03-01 18:12:43,788 INFO L226 Difference]: Without dead ends: 40124 [2022-03-01 18:12:43,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:12:43,789 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 2030 mSDsluCounter, 9026 mSDsCounter, 0 mSdLazyCounter, 7868 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2030 SdHoareTripleChecker+Valid, 4010 SdHoareTripleChecker+Invalid, 8360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 7868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:43,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2030 Valid, 4010 Invalid, 8360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 7868 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-01 18:12:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40124 states. [2022-03-01 18:12:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40124 to 5233. [2022-03-01 18:12:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.9722859327217126) internal successors, (15551), 5232 states have internal predecessors, (15551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 15551 transitions. [2022-03-01 18:12:44,077 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 15551 transitions. Word has length 67 [2022-03-01 18:12:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:44,077 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 15551 transitions. [2022-03-01 18:12:44,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 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) [2022-03-01 18:12:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 15551 transitions. [2022-03-01 18:12:44,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-01 18:12:44,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:44,085 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:44,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 18:12:44,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:44,286 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:12:44,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash -321880841, now seen corresponding path program 62 times [2022-03-01 18:12:44,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:44,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294203393] [2022-03-01 18:12:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:44,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:44,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:44,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294203393] [2022-03-01 18:12:44,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294203393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:44,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503568570] [2022-03-01 18:12:44,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:12:44,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:44,724 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) [2022-03-01 18:12:44,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 18:12:44,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:12:44,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:44,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-01 18:12:44,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:44,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:45,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503568570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:45,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:45,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 32 [2022-03-01 18:12:45,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806172441] [2022-03-01 18:12:45,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:45,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:12:45,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:12:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:12:45,020 INFO L87 Difference]: Start difference. First operand 5233 states and 15551 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:45,326 INFO L93 Difference]: Finished difference Result 39442 states and 116421 transitions. [2022-03-01 18:12:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:12:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-03-01 18:12:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:45,419 INFO L225 Difference]: With dead ends: 39442 [2022-03-01 18:12:45,419 INFO L226 Difference]: Without dead ends: 39381 [2022-03-01 18:12:45,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:12:45,420 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 678 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:45,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 215 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:12:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39381 states. [2022-03-01 18:12:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39381 to 2944. [2022-03-01 18:12:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2944 states, 2943 states have (on average 2.359157322460075) internal successors, (6943), 2943 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 6943 transitions. [2022-03-01 18:12:45,756 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 6943 transitions. Word has length 68 [2022-03-01 18:12:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:45,756 INFO L470 AbstractCegarLoop]: Abstraction has 2944 states and 6943 transitions. [2022-03-01 18:12:45,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 6943 transitions. [2022-03-01 18:12:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-01 18:12:45,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:45,760 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:45,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-01 18:12:45,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:45,981 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:12:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1299745014, now seen corresponding path program 63 times [2022-03-01 18:12:45,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:45,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376968919] [2022-03-01 18:12:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:45,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:47,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:47,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376968919] [2022-03-01 18:12:47,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376968919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:47,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809966265] [2022-03-01 18:12:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:12:47,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:47,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:47,655 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) [2022-03-01 18:12:47,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 18:12:47,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-01 18:12:47,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-01 18:12:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:52,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:52,191 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 11 treesize of output 7 [2022-03-01 18:12:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 435 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:52,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:56,023 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:12:56,024 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 12 treesize of output 11 [2022-03-01 18:12:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 406 proven. 524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:56,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809966265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:56,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:56,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 152 [2022-03-01 18:12:56,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754713740] [2022-03-01 18:12:56,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:56,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-01 18:12:56,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:56,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-01 18:12:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3875, Invalid=19381, Unknown=0, NotChecked=0, Total=23256 [2022-03-01 18:12:56,088 INFO L87 Difference]: Start difference. First operand 2944 states and 6943 transitions. Second operand has 153 states, 153 states have (on average 1.0849673202614378) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:04,801 INFO L93 Difference]: Finished difference Result 93673 states and 239805 transitions. [2022-03-01 18:15:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 584 states. [2022-03-01 18:15:04,802 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.0849673202614378) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-03-01 18:15:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:05,004 INFO L225 Difference]: With dead ends: 93673 [2022-03-01 18:15:05,004 INFO L226 Difference]: Without dead ends: 93644 [2022-03-01 18:15:05,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1322 GetRequests, 566 SyntacticMatches, 54 SemanticMatches, 702 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144248 ImplicationChecksByTransitivity, 76.2s TimeCoverageRelationStatistics Valid=129650, Invalid=365262, Unknown=0, NotChecked=0, Total=494912 [2022-03-01 18:15:05,030 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 4738 mSDsluCounter, 4516 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4738 SdHoareTripleChecker+Valid, 3243 SdHoareTripleChecker+Invalid, 9451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6027 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:05,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4738 Valid, 3243 Invalid, 9451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 2866 Invalid, 0 Unknown, 6027 Unchecked, 1.1s Time] [2022-03-01 18:15:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93644 states. [2022-03-01 18:15:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93644 to 8584. [2022-03-01 18:15:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8584 states, 8583 states have (on average 2.7711755796341606) internal successors, (23785), 8583 states have internal predecessors, (23785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8584 states to 8584 states and 23785 transitions. [2022-03-01 18:15:05,938 INFO L78 Accepts]: Start accepts. Automaton has 8584 states and 23785 transitions. Word has length 69 [2022-03-01 18:15:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:05,938 INFO L470 AbstractCegarLoop]: Abstraction has 8584 states and 23785 transitions. [2022-03-01 18:15:05,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.0849673202614378) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 8584 states and 23785 transitions. [2022-03-01 18:15:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-01 18:15:05,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:05,949 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:05,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:06,149 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,SelfDestructingSolverStorable64 [2022-03-01 18:15:06,149 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1443635544, now seen corresponding path program 64 times [2022-03-01 18:15:06,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:06,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147908807] [2022-03-01 18:15:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:06,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:07,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147908807] [2022-03-01 18:15:07,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147908807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:07,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427088351] [2022-03-01 18:15:07,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:07,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:07,715 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) [2022-03-01 18:15:07,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 18:15:07,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:07,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-01 18:15:07,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:07,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:15:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:08,038 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:15:08,038 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 14 treesize of output 13 [2022-03-01 18:15:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:08,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427088351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:08,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:08,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 62 [2022-03-01 18:15:08,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7829116] [2022-03-01 18:15:08,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:08,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-01 18:15:08,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-01 18:15:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 18:15:08,166 INFO L87 Difference]: Start difference. First operand 8584 states and 23785 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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) [2022-03-01 18:15:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:15,266 INFO L93 Difference]: Finished difference Result 48422 states and 141583 transitions. [2022-03-01 18:15:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 18:15:15,266 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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 69 [2022-03-01 18:15:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:15,355 INFO L225 Difference]: With dead ends: 48422 [2022-03-01 18:15:15,355 INFO L226 Difference]: Without dead ends: 46784 [2022-03-01 18:15:15,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2022-03-01 18:15:15,357 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 2163 mSDsluCounter, 9800 mSDsCounter, 0 mSdLazyCounter, 8500 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2163 SdHoareTripleChecker+Valid, 4343 SdHoareTripleChecker+Invalid, 9024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 8500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:15,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2163 Valid, 4343 Invalid, 9024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 8500 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-01 18:15:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46784 states. [2022-03-01 18:15:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46784 to 5824. [2022-03-01 18:15:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5824 states, 5823 states have (on average 2.9594710630259318) internal successors, (17233), 5823 states have internal predecessors, (17233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5824 states to 5824 states and 17233 transitions. [2022-03-01 18:15:15,692 INFO L78 Accepts]: Start accepts. Automaton has 5824 states and 17233 transitions. Word has length 69 [2022-03-01 18:15:15,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:15,692 INFO L470 AbstractCegarLoop]: Abstraction has 5824 states and 17233 transitions. [2022-03-01 18:15:15,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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) [2022-03-01 18:15:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5824 states and 17233 transitions. [2022-03-01 18:15:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-01 18:15:15,700 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:15,700 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:15,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-01 18:15:15,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:15,900 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1804358531, now seen corresponding path program 65 times [2022-03-01 18:15:15,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:15,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761303201] [2022-03-01 18:15:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:15,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:16,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:16,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761303201] [2022-03-01 18:15:16,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761303201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:16,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839971532] [2022-03-01 18:15:16,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:16,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:16,326 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) [2022-03-01 18:15:16,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 18:15:16,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-01 18:15:16,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-01 18:15:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:16,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:16,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839971532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:16,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:16,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 33 [2022-03-01 18:15:16,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478920418] [2022-03-01 18:15:16,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:16,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:15:16,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:15:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:15:16,627 INFO L87 Difference]: Start difference. First operand 5824 states and 17233 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:17,065 INFO L93 Difference]: Finished difference Result 44892 states and 132483 transitions. [2022-03-01 18:15:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:15:17,065 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-01 18:15:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:17,148 INFO L225 Difference]: With dead ends: 44892 [2022-03-01 18:15:17,148 INFO L226 Difference]: Without dead ends: 44798 [2022-03-01 18:15:17,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:15:17,148 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 536 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:17,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 237 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44798 states. [2022-03-01 18:15:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44798 to 3256. [2022-03-01 18:15:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3255 states have (on average 2.3459293394777267) internal successors, (7636), 3255 states have internal predecessors, (7636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 7636 transitions. [2022-03-01 18:15:17,460 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 7636 transitions. Word has length 70 [2022-03-01 18:15:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:17,460 INFO L470 AbstractCegarLoop]: Abstraction has 3256 states and 7636 transitions. [2022-03-01 18:15:17,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 7636 transitions. [2022-03-01 18:15:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-01 18:15:17,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:17,463 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:17,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-01 18:15:17,663 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,SelfDestructingSolverStorable66 [2022-03-01 18:15:17,663 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1809632066, now seen corresponding path program 66 times [2022-03-01 18:15:17,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:17,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768898766] [2022-03-01 18:15:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:17,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:19,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768898766] [2022-03-01 18:15:19,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768898766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:19,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318619168] [2022-03-01 18:15:19,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:19,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:19,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:19,313 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) [2022-03-01 18:15:19,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 18:15:19,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-01 18:15:19,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-01 18:15:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:19,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:15:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:19,666 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:15:19,666 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 14 treesize of output 13 [2022-03-01 18:15:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318619168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:19,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:19,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 64 [2022-03-01 18:15:19,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119256719] [2022-03-01 18:15:19,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:19,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-01 18:15:19,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-01 18:15:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:15:19,813 INFO L87 Difference]: Start difference. First operand 3256 states and 7636 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:27,282 INFO L93 Difference]: Finished difference Result 4999 states and 10966 transitions. [2022-03-01 18:15:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:15:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-03-01 18:15:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:27,287 INFO L225 Difference]: With dead ends: 4999 [2022-03-01 18:15:27,287 INFO L226 Difference]: Without dead ends: 3259 [2022-03-01 18:15:27,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2022-03-01 18:15:27,288 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 2296 mSDsluCounter, 10452 mSDsCounter, 0 mSdLazyCounter, 9062 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2296 SdHoareTripleChecker+Valid, 4627 SdHoareTripleChecker+Invalid, 9619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 9062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:27,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2296 Valid, 4627 Invalid, 9619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 9062 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:15:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2022-03-01 18:15:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 171. [2022-03-01 18:15:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.9764705882352942) internal successors, (336), 170 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2022-03-01 18:15:27,298 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2022-03-01 18:15:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:27,299 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2022-03-01 18:15:27,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2022-03-01 18:15:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-01 18:15:27,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:27,299 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:27,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-01 18:15:27,499 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,SelfDestructingSolverStorable67 [2022-03-01 18:15:27,500 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:27,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash 287097429, now seen corresponding path program 67 times [2022-03-01 18:15:27,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:27,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515312549] [2022-03-01 18:15:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:27,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:27,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515312549] [2022-03-01 18:15:27,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515312549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:27,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690960163] [2022-03-01 18:15:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:27,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:27,937 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) [2022-03-01 18:15:27,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 18:15:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-01 18:15:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:28,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:28,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690960163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:28,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:28,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 34 [2022-03-01 18:15:28,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433401076] [2022-03-01 18:15:28,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:28,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:15:28,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:15:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:15:28,235 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:28,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:28,412 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2022-03-01 18:15:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:15:28,412 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-03-01 18:15:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:28,414 INFO L225 Difference]: With dead ends: 2045 [2022-03-01 18:15:28,414 INFO L226 Difference]: Without dead ends: 1980 [2022-03-01 18:15:28,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:15:28,415 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 556 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:28,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 242 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2022-03-01 18:15:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2022-03-01 18:15:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.0492445439283715) internal successors, (3662), 1787 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2022-03-01 18:15:28,429 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2022-03-01 18:15:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:28,429 INFO L470 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2022-03-01 18:15:28,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2022-03-01 18:15:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-01 18:15:28,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:28,431 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:28,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-01 18:15:28,631 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,SelfDestructingSolverStorable68 [2022-03-01 18:15:28,631 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1899843126, now seen corresponding path program 68 times [2022-03-01 18:15:28,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:28,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492681247] [2022-03-01 18:15:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:28,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:30,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:30,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492681247] [2022-03-01 18:15:30,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492681247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:30,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334128908] [2022-03-01 18:15:30,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:30,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:30,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:30,366 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) [2022-03-01 18:15:30,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 18:15:30,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:30,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:30,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2022-03-01 18:15:30,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:30,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:15:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:30,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:30,701 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:15:30,702 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 14 treesize of output 13 [2022-03-01 18:15:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:30,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334128908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:30,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:30,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 66 [2022-03-01 18:15:30,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735038836] [2022-03-01 18:15:30,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:30,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-01 18:15:30,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-01 18:15:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:15:30,838 INFO L87 Difference]: Start difference. First operand 1788 states and 3662 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:38,754 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2022-03-01 18:15:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:15:38,755 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-03-01 18:15:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:38,758 INFO L225 Difference]: With dead ends: 3635 [2022-03-01 18:15:38,758 INFO L226 Difference]: Without dead ends: 2319 [2022-03-01 18:15:38,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2022-03-01 18:15:38,759 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2434 mSDsluCounter, 11125 mSDsCounter, 0 mSdLazyCounter, 9642 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 4920 SdHoareTripleChecker+Invalid, 10233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 9642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:38,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 4920 Invalid, 10233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 9642 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-01 18:15:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-03-01 18:15:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2022-03-01 18:15:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.977142857142857) internal successors, (346), 175 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2022-03-01 18:15:38,766 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2022-03-01 18:15:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:38,766 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2022-03-01 18:15:38,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2022-03-01 18:15:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-01 18:15:38,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:38,767 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:38,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:38,967 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,SelfDestructingSolverStorable69 [2022-03-01 18:15:38,967 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1211327007, now seen corresponding path program 69 times [2022-03-01 18:15:38,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:38,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200944840] [2022-03-01 18:15:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:39,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:39,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200944840] [2022-03-01 18:15:39,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200944840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:39,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952003599] [2022-03-01 18:15:39,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:39,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:39,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:39,459 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) [2022-03-01 18:15:39,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 18:15:39,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-03-01 18:15:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:39,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-01 18:15:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:39,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:39,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952003599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:39,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:39,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 35 [2022-03-01 18:15:39,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667656236] [2022-03-01 18:15:39,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:39,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:15:39,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:15:39,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:15:39,765 INFO L87 Difference]: Start difference. First operand 176 states and 346 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:39,966 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2022-03-01 18:15:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:15:39,966 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-03-01 18:15:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:39,968 INFO L225 Difference]: With dead ends: 2158 [2022-03-01 18:15:39,969 INFO L226 Difference]: Without dead ends: 2091 [2022-03-01 18:15:39,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:15:39,969 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 633 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:39,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 259 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-03-01 18:15:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2022-03-01 18:15:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.0480972515856237) internal successors, (3875), 1892 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2022-03-01 18:15:39,985 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2022-03-01 18:15:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:39,985 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2022-03-01 18:15:39,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2022-03-01 18:15:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-01 18:15:39,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:39,987 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:40,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-01 18:15:40,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:40,188 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1845906046, now seen corresponding path program 70 times [2022-03-01 18:15:40,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:40,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190871429] [2022-03-01 18:15:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:40,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:42,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:42,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190871429] [2022-03-01 18:15:42,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190871429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:42,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21891731] [2022-03-01 18:15:42,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:42,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:42,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:42,041 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) [2022-03-01 18:15:42,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 18:15:42,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:42,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-01 18:15:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:42,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:15:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:42,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:42,417 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:15:42,417 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 14 treesize of output 13 [2022-03-01 18:15:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:42,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21891731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:42,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:42,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 68 [2022-03-01 18:15:42,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840296121] [2022-03-01 18:15:42,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:42,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-01 18:15:42,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-01 18:15:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:15:42,555 INFO L87 Difference]: Start difference. First operand 1893 states and 3875 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:51,039 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2022-03-01 18:15:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 18:15:51,039 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-03-01 18:15:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:51,042 INFO L225 Difference]: With dead ends: 3847 [2022-03-01 18:15:51,042 INFO L226 Difference]: Without dead ends: 2457 [2022-03-01 18:15:51,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2022-03-01 18:15:51,043 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 2576 mSDsluCounter, 11819 mSDsCounter, 0 mSdLazyCounter, 10240 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 5222 SdHoareTripleChecker+Invalid, 10866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 10240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:51,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 5222 Invalid, 10866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 10240 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-01 18:15:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2022-03-01 18:15:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2022-03-01 18:15:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.9777777777777779) internal successors, (356), 180 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2022-03-01 18:15:51,050 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2022-03-01 18:15:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:51,050 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2022-03-01 18:15:51,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2022-03-01 18:15:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-01 18:15:51,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:51,050 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:51,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 18:15:51,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:51,251 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:51,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:51,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1365434347, now seen corresponding path program 71 times [2022-03-01 18:15:51,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:51,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688805301] [2022-03-01 18:15:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:51,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:51,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688805301] [2022-03-01 18:15:51,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688805301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:51,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135734567] [2022-03-01 18:15:51,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:51,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:51,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:51,745 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) [2022-03-01 18:15:51,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 18:15:51,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-01 18:15:51,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:51,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-01 18:15:51,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:51,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:52,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135734567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:52,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:52,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 36 [2022-03-01 18:15:52,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963938987] [2022-03-01 18:15:52,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:52,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:15:52,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:15:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:15:52,066 INFO L87 Difference]: Start difference. First operand 181 states and 356 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:52,267 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2022-03-01 18:15:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:15:52,268 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-03-01 18:15:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:52,270 INFO L225 Difference]: With dead ends: 2274 [2022-03-01 18:15:52,270 INFO L226 Difference]: Without dead ends: 2205 [2022-03-01 18:15:52,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:15:52,270 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 511 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:52,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 277 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2022-03-01 18:15:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2022-03-01 18:15:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 2.047) internal successors, (4094), 2000 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2022-03-01 18:15:52,286 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2022-03-01 18:15:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:52,286 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2022-03-01 18:15:52,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2022-03-01 18:15:52,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-01 18:15:52,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:52,288 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:52,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:52,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:52,501 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1310534794, now seen corresponding path program 72 times [2022-03-01 18:15:52,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:52,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487883803] [2022-03-01 18:15:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:52,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:54,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:54,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487883803] [2022-03-01 18:15:54,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487883803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:54,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642661679] [2022-03-01 18:15:54,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:54,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:54,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:54,506 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) [2022-03-01 18:15:54,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 18:15:54,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-01 18:15:54,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 141 conjunts are in the unsatisfiable core [2022-03-01 18:15:54,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:54,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:15:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:54,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:54,880 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:15:54,881 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 14 treesize of output 13 [2022-03-01 18:15:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:55,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642661679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:55,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:55,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 70 [2022-03-01 18:15:55,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079485864] [2022-03-01 18:15:55,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-01 18:15:55,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-01 18:15:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 18:15:55,025 INFO L87 Difference]: Start difference. First operand 2001 states and 4094 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:04,180 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2022-03-01 18:16:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 18:16:04,180 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-03-01 18:16:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:04,184 INFO L225 Difference]: With dead ends: 4065 [2022-03-01 18:16:04,184 INFO L226 Difference]: Without dead ends: 2599 [2022-03-01 18:16:04,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2022-03-01 18:16:04,185 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2722 mSDsluCounter, 12534 mSDsCounter, 0 mSdLazyCounter, 10856 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2722 SdHoareTripleChecker+Valid, 5533 SdHoareTripleChecker+Invalid, 11518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 10856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:04,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2722 Valid, 5533 Invalid, 11518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 10856 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-01 18:16:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2022-03-01 18:16:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2022-03-01 18:16:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.9783783783783784) internal successors, (366), 185 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2022-03-01 18:16:04,193 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2022-03-01 18:16:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:04,193 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2022-03-01 18:16:04,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2022-03-01 18:16:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-01 18:16:04,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:04,194 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:04,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:04,394 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,SelfDestructingSolverStorable73 [2022-03-01 18:16:04,395 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1948794719, now seen corresponding path program 73 times [2022-03-01 18:16:04,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:04,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767955798] [2022-03-01 18:16:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:04,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:04,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:04,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767955798] [2022-03-01 18:16:04,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767955798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:04,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004087844] [2022-03-01 18:16:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:16:04,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:04,911 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) [2022-03-01 18:16:04,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 18:16:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-01 18:16:04,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:05,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:05,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004087844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:05,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:05,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 37 [2022-03-01 18:16:05,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548412328] [2022-03-01 18:16:05,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:05,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:16:05,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:05,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:16:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:16:05,272 INFO L87 Difference]: Start difference. First operand 186 states and 366 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:05,478 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2022-03-01 18:16:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:16:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-03-01 18:16:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:05,482 INFO L225 Difference]: With dead ends: 2393 [2022-03-01 18:16:05,482 INFO L226 Difference]: Without dead ends: 2322 [2022-03-01 18:16:05,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:16:05,483 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 517 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:05,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 288 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:16:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-03-01 18:16:05,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2022-03-01 18:16:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.045949786830886) internal successors, (4319), 2111 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2022-03-01 18:16:05,509 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2022-03-01 18:16:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:05,509 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2022-03-01 18:16:05,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2022-03-01 18:16:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-01 18:16:05,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:05,512 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:05,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 18:16:05,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:05,719 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash -729931838, now seen corresponding path program 74 times [2022-03-01 18:16:05,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:05,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907080482] [2022-03-01 18:16:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:05,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:07,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:07,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907080482] [2022-03-01 18:16:07,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907080482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:07,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601441807] [2022-03-01 18:16:07,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:16:07,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:07,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:07,769 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) [2022-03-01 18:16:07,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 18:16:07,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:16:07,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2022-03-01 18:16:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:08,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:16:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:08,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:08,198 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:16:08,199 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 14 treesize of output 13 [2022-03-01 18:16:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:08,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601441807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:08,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:08,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 72 [2022-03-01 18:16:08,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465845495] [2022-03-01 18:16:08,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:08,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-01 18:16:08,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:08,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-01 18:16:08,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:16:08,357 INFO L87 Difference]: Start difference. First operand 2112 states and 4319 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:18,110 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2022-03-01 18:16:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-01 18:16:18,111 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-03-01 18:16:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:18,114 INFO L225 Difference]: With dead ends: 4289 [2022-03-01 18:16:18,114 INFO L226 Difference]: Without dead ends: 2745 [2022-03-01 18:16:18,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2022-03-01 18:16:18,115 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 2872 mSDsluCounter, 13270 mSDsCounter, 0 mSdLazyCounter, 11490 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2872 SdHoareTripleChecker+Valid, 5853 SdHoareTripleChecker+Invalid, 12189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 11490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:18,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2872 Valid, 5853 Invalid, 12189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 11490 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-01 18:16:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-03-01 18:16:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2022-03-01 18:16:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9789473684210526) internal successors, (376), 190 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2022-03-01 18:16:18,123 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2022-03-01 18:16:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:18,123 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2022-03-01 18:16:18,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2022-03-01 18:16:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-01 18:16:18,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:18,124 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:18,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:18,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:18,325 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1129972267, now seen corresponding path program 75 times [2022-03-01 18:16:18,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:18,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171227149] [2022-03-01 18:16:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:18,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:18,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:18,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171227149] [2022-03-01 18:16:18,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171227149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:18,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56718395] [2022-03-01 18:16:18,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:16:18,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:18,878 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) [2022-03-01 18:16:18,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 18:16:18,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-01 18:16:18,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-01 18:16:18,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:19,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:19,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56718395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:19,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:19,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 38 [2022-03-01 18:16:19,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132913359] [2022-03-01 18:16:19,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:19,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 18:16:19,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 18:16:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:16:19,215 INFO L87 Difference]: Start difference. First operand 191 states and 376 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:19,422 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2022-03-01 18:16:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:16:19,423 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-03-01 18:16:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:19,425 INFO L225 Difference]: With dead ends: 2515 [2022-03-01 18:16:19,425 INFO L226 Difference]: Without dead ends: 2442 [2022-03-01 18:16:19,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:16:19,426 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 573 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:19,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 277 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:16:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2022-03-01 18:16:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2022-03-01 18:16:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.044943820224719) internal successors, (4550), 2225 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2022-03-01 18:16:19,445 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2022-03-01 18:16:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:19,445 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2022-03-01 18:16:19,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2022-03-01 18:16:19,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-01 18:16:19,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:19,447 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:19,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:19,648 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,SelfDestructingSolverStorable76 [2022-03-01 18:16:19,648 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:19,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1966151862, now seen corresponding path program 76 times [2022-03-01 18:16:19,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:19,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754209453] [2022-03-01 18:16:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:19,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:21,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:21,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754209453] [2022-03-01 18:16:21,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754209453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:21,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142953413] [2022-03-01 18:16:21,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:16:21,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:21,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:21,827 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) [2022-03-01 18:16:21,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 18:16:21,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:16:21,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:21,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2022-03-01 18:16:21,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:22,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:16:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:22,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:22,205 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 18:16:22,205 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 14 treesize of output 13 [2022-03-01 18:16:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:22,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142953413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:22,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:22,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 74 [2022-03-01 18:16:22,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891967567] [2022-03-01 18:16:22,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:22,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-01 18:16:22,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-01 18:16:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:16:22,359 INFO L87 Difference]: Start difference. First operand 2226 states and 4550 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:32,730 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2022-03-01 18:16:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:16:32,730 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-03-01 18:16:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:32,734 INFO L225 Difference]: With dead ends: 4519 [2022-03-01 18:16:32,735 INFO L226 Difference]: Without dead ends: 2895 [2022-03-01 18:16:32,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2022-03-01 18:16:32,736 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 3026 mSDsluCounter, 14027 mSDsCounter, 0 mSdLazyCounter, 12142 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3026 SdHoareTripleChecker+Valid, 6182 SdHoareTripleChecker+Invalid, 12879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 12142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:32,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3026 Valid, 6182 Invalid, 12879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 12142 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-01 18:16:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-03-01 18:16:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2022-03-01 18:16:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 195 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2022-03-01 18:16:32,748 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2022-03-01 18:16:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:32,748 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2022-03-01 18:16:32,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2022-03-01 18:16:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-01 18:16:32,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:32,748 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:32,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-01 18:16:32,949 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,SelfDestructingSolverStorable77 [2022-03-01 18:16:32,949 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:32,949 INFO L85 PathProgramCache]: Analyzing trace with hash 844243809, now seen corresponding path program 77 times [2022-03-01 18:16:32,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:32,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925429469] [2022-03-01 18:16:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:32,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:33,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:33,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925429469] [2022-03-01 18:16:33,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925429469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:33,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977113769] [2022-03-01 18:16:33,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:16:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:33,523 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) [2022-03-01 18:16:33,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 18:16:33,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-01 18:16:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:33,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-01 18:16:33,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:33,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:33,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977113769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:33,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:33,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 39 [2022-03-01 18:16:33,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126787470] [2022-03-01 18:16:33,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:33,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:16:33,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:33,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:16:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:16:33,880 INFO L87 Difference]: Start difference. First operand 196 states and 386 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:34,107 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2022-03-01 18:16:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:16:34,108 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-03-01 18:16:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:34,111 INFO L225 Difference]: With dead ends: 2640 [2022-03-01 18:16:34,111 INFO L226 Difference]: Without dead ends: 2565 [2022-03-01 18:16:34,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:16:34,111 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 765 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:34,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 283 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:16:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2022-03-01 18:16:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2022-03-01 18:16:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.04397950469684) internal successors, (4787), 2342 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2022-03-01 18:16:34,131 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2022-03-01 18:16:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:34,131 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2022-03-01 18:16:34,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2022-03-01 18:16:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-01 18:16:34,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:34,133 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:34,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 18:16:34,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:34,334 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash -192804350, now seen corresponding path program 78 times [2022-03-01 18:16:34,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:34,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120465799] [2022-03-01 18:16:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:36,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:36,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120465799] [2022-03-01 18:16:36,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120465799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:36,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851982601] [2022-03-01 18:16:36,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:16:36,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:36,662 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) [2022-03-01 18:16:36,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 18:16:36,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-03-01 18:16:36,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:36,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-01 18:16:36,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:43,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:43,278 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 11 treesize of output 7 [2022-03-01 18:16:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 666 proven. 740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:43,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:48,946 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:16:48,946 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 12 treesize of output 11 [2022-03-01 18:16:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 630 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:49,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851982601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:49,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:49,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 187 [2022-03-01 18:16:49,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511659908] [2022-03-01 18:16:49,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-03-01 18:16:49,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-03-01 18:16:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5814, Invalid=29342, Unknown=0, NotChecked=0, Total=35156 [2022-03-01 18:16:49,020 INFO L87 Difference]: Start difference. First operand 2343 states and 4787 transitions. Second operand has 188 states, 188 states have (on average 1.0691489361702127) internal successors, (201), 187 states have internal predecessors, (201), 0 states have call successors, (0), 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... [2022-03-01 18:20:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 671 states. [2022-03-01 18:20:08,883 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 [2022-03-01 18:20:08,883 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:20:08,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1518 GetRequests, 614 SyntacticMatches, 83 SemanticMatches, 820 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 182485 ImplicationChecksByTransitivity, 127.0s TimeCoverageRelationStatistics Valid=173791, Invalid=501071, Unknown=0, NotChecked=0, Total=674862 [2022-03-01 18:20:08,911 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2645 mSDsluCounter, 6567 mSDsCounter, 0 mSdLazyCounter, 4155 mSolverCounterSat, 890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 4997 SdHoareTripleChecker+Invalid, 19061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 4155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14016 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:08,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2645 Valid, 4997 Invalid, 19061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [890 Valid, 4155 Invalid, 0 Unknown, 14016 Unchecked, 1.6s Time] [2022-03-01 18:20:08,912 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-01 18:20:08,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-01 18:20:09,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:09,113 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (2343states) and FLOYD_HOARE automaton (currently 671 states, 188 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 822 known predicates. [2022-03-01 18:20:09,115 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-01 18:20:09,115 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-01 18:20:09,118 INFO L732 BasicCegarLoop]: Path program histogram: [78, 1, 1] [2022-03-01 18:20:09,120 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:20:09,120 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:20:09,121 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:20:09 BasicIcfg [2022-03-01 18:20:09,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:20:09,122 INFO L158 Benchmark]: Toolchain (without parser) took 777075.16ms. Allocated memory was 191.9MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 148.9MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. [2022-03-01 18:20:09,122 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.17ms. Allocated memory is still 191.9MB. Free memory is still 149.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:20:09,122 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.38ms. Allocated memory is still 191.9MB. Free memory was 148.8MB in the beginning and 147.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:20:09,122 INFO L158 Benchmark]: Boogie Preprocessor took 18.37ms. Allocated memory is still 191.9MB. Free memory was 147.3MB in the beginning and 146.3MB in the end (delta: 924.0kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-01 18:20:09,122 INFO L158 Benchmark]: RCFGBuilder took 238.65ms. Allocated memory is still 191.9MB. Free memory was 146.2MB in the beginning and 137.5MB in the end (delta: 8.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:20:09,122 INFO L158 Benchmark]: TraceAbstraction took 776788.84ms. Allocated memory was 191.9MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 136.9MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-03-01 18:20:09,122 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 0.17ms. Allocated memory is still 191.9MB. Free memory is still 149.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.38ms. Allocated memory is still 191.9MB. Free memory was 148.8MB in the beginning and 147.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 18.37ms. Allocated memory is still 191.9MB. Free memory was 147.3MB in the beginning and 146.3MB in the end (delta: 924.0kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 238.65ms. Allocated memory is still 191.9MB. Free memory was 146.2MB in the beginning and 137.5MB in the end (delta: 8.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 776788.84ms. Allocated memory was 191.9MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 136.9MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.5GB. 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: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (2343states) and FLOYD_HOARE automaton (currently 671 states, 188 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 822 known predicates. - TimeoutResultAtElement [Line: 41]: 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 (2343states) and FLOYD_HOARE automaton (currently 671 states, 188 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 822 known predicates. - TimeoutResultAtElement [Line: 41]: 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 (2343states) and FLOYD_HOARE automaton (currently 671 states, 188 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 822 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 776.7s, OverallIterations: 80, TraceHistogramMax: 37, PathProgramHistogramMax: 78, EmptinessCheckTime: 0.2s, AutomataDifference: 647.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68546 SdHoareTripleChecker+Valid, 61.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68546 mSDsluCounter, 103220 SdHoareTripleChecker+Invalid, 50.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 28372 IncrementalHoareTripleChecker+Unchecked, 208815 mSDsCounter, 12872 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 172384 IncrementalHoareTripleChecker+Invalid, 213628 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12872 mSolverCounterUnsat, 3532 mSDtfsCounter, 172384 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16373 GetRequests, 9424 SyntacticMatches, 463 SemanticMatches, 6485 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 564241 ImplicationChecksByTransitivity, 439.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8584occurred in iteration=65, InterpolantAutomatonStates: 4031, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.9s AutomataMinimizationTime, 79 MinimizatonAttempts, 365529 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 103.4s InterpolantComputationTime, 7395 NumberOfCodeBlocks, 7395 NumberOfCodeBlocksAsserted, 571 NumberOfCheckSat, 10847 ConstructedInterpolants, 304 QuantifiedInterpolants, 70814 SizeOfPredicates, 93 NumberOfNonLiveVariables, 15171 ConjunctsInSsa, 4504 ConjunctsInUnsatCore, 236 InterpolantComputations, 2 PerfectInterpolantSequences, 31224/116035 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