/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 03:26:55,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:26:55,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:26:55,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 03:26:55,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-10 03:26:55,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:26:55,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:26:55,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:26:55,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:26:55,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:26:55,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:26:55,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:26:55,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:26:55,268 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:26:55,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:26:55,268 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:26:55,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:26:55,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:26:55,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:26:55,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:26:55,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:26:55,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:26:55,269 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:26:55,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:26:55,269 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:26:55,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:26:55,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:26:55,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:26:55,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:26:55,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:26:55,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:26:55,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:26:55,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:26:55,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:26:55,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:26:55,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:26:55,271 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:26:55,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:26:55,272 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:26:55,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:26:55,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:26:55,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:26:55,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:26:55,514 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:26:55,516 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:26:55,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2022-02-10 03:26:55,517 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2022-02-10 03:26:55,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:26:55,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:26:55,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:26:55,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:26:55,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:26:55,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,566 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:26:55,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:26:55,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:26:55,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:26:55,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:26:55,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:26:55,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:26:55,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:26:55,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:26:55,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/1) ... [2022-02-10 03:26:55,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:26:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:26:55,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-10 03:26:55,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-10 03:26:55,651 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:26:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:26:55,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:26:55,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:26:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:26:55,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:26:55,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:26:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:26:55,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:26:55,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-10 03:26:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-10 03:26:55,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-10 03:26:55,653 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 03:26:55,693 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:26:55,695 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:26:55,768 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:26:55,780 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:26:55,781 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 03:26:55,782 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:26:55 BoogieIcfgContainer [2022-02-10 03:26:55,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:26:55,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:26:55,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:26:55,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:26:55,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:26:55" (1/2) ... [2022-02-10 03:26:55,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710dd2b2 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:26:55, skipping insertion in model container [2022-02-10 03:26:55,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:26:55" (2/2) ... [2022-02-10 03:26:55,789 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2022-02-10 03:26:55,793 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:26:55,793 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:26:55,794 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:26:55,794 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:26:55,824 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-10 03:26:55,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:26:55,867 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-10 03:26:55,867 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-10 03:26:55,875 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2022-02-10 03:26:55,910 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:26:58,040 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 112938 transitions and produced 49040 states. [2022-02-10 03:26:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 49040 states, 28781 states have (on average 1.9412112157326014) internal successors, (55870), 49039 states have internal predecessors, (55870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:26:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 03:26:58,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:26:58,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:26:58,578 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:26:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:26:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1798569311, now seen corresponding path program 1 times [2022-02-10 03:26:58,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:26:58,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625392929] [2022-02-10 03:26:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:26:58,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:26:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:26:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:26:58,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:26:58,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625392929] [2022-02-10 03:26:58,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625392929] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:26:58,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:26:58,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:26:58,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516837887] [2022-02-10 03:26:58,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:26:58,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:26:58,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:26:58,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:26:58,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:26:58,927 INFO L87 Difference]: Start difference. First operand has 49040 states, 28781 states have (on average 1.9412112157326014) internal successors, (55870), 49039 states have internal predecessors, (55870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2022-02-10 03:27:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:00,055 INFO L93 Difference]: Finished difference Result 29069 states and 34926 transitions. [2022-02-10 03:27:00,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:27:00,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 [2022-02-10 03:27:00,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:00,097 INFO L225 Difference]: With dead ends: 29069 [2022-02-10 03:27:00,097 INFO L226 Difference]: Without dead ends: 3255 [2022-02-10 03:27:00,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:27:00,105 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:00,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:27:00,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-02-10 03:27:00,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 44. [2022-02-10 03:27:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-02-10 03:27:00,282 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 19 [2022-02-10 03:27:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:00,283 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-02-10 03:27:00,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2022-02-10 03:27:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-02-10 03:27:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 03:27:00,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:00,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:00,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:27:00,285 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1404113307, now seen corresponding path program 2 times [2022-02-10 03:27:00,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:00,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224799970] [2022-02-10 03:27:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:00,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:00,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:00,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224799970] [2022-02-10 03:27:00,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224799970] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:27:00,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:27:00,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:27:00,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893119260] [2022-02-10 03:27:00,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:27:00,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:27:00,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:00,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:27:00,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:27:00,339 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:00,410 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2022-02-10 03:27:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 03:27:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-10 03:27:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:00,411 INFO L225 Difference]: With dead ends: 65 [2022-02-10 03:27:00,412 INFO L226 Difference]: Without dead ends: 57 [2022-02-10 03:27:00,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-10 03:27:00,413 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:00,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:27:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-10 03:27:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-10 03:27:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-02-10 03:27:00,424 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 19 [2022-02-10 03:27:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:00,424 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-02-10 03:27:00,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-02-10 03:27:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:27:00,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:00,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:00,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:27:00,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:00,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1364646154, now seen corresponding path program 1 times [2022-02-10 03:27:00,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:00,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38947960] [2022-02-10 03:27:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:00,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:00,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:00,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38947960] [2022-02-10 03:27:00,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38947960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:27:00,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:27:00,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:27:00,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992715503] [2022-02-10 03:27:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:27:00,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:27:00,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:27:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:27:00,460 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:00,471 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2022-02-10 03:27:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:27:00,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-10 03:27:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:00,473 INFO L225 Difference]: With dead ends: 66 [2022-02-10 03:27:00,473 INFO L226 Difference]: Without dead ends: 61 [2022-02-10 03:27:00,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:27:00,474 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:00,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:27:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-10 03:27:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-10 03:27:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 60 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-02-10 03:27:00,478 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 22 [2022-02-10 03:27:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:00,479 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-02-10 03:27:00,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-02-10 03:27:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:27:00,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:00,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:00,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-10 03:27:00,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:00,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1220695708, now seen corresponding path program 1 times [2022-02-10 03:27:00,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:00,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911488996] [2022-02-10 03:27:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:00,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:00,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:00,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911488996] [2022-02-10 03:27:00,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911488996] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:00,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172972781] [2022-02-10 03:27:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:00,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:00,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:00,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:00,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 03:27:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-10 03:27:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:01,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:27:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:01,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:01,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:27:01,224 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 18 [2022-02-10 03:27:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:01,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172972781] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:01,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:01,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:27:01,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954213172] [2022-02-10 03:27:01,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:01,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:27:01,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:27:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:27:01,367 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:01,844 INFO L93 Difference]: Finished difference Result 98 states and 136 transitions. [2022-02-10 03:27:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:27:01,846 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:27:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:01,846 INFO L225 Difference]: With dead ends: 98 [2022-02-10 03:27:01,847 INFO L226 Difference]: Without dead ends: 87 [2022-02-10 03:27:01,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:27:01,850 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:01,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 80 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:27:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-10 03:27:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2022-02-10 03:27:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 75 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2022-02-10 03:27:01,856 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 25 [2022-02-10 03:27:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:01,856 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2022-02-10 03:27:01,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2022-02-10 03:27:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 03:27:01,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:01,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:01,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 03:27:02,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:02,058 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1935029845, now seen corresponding path program 2 times [2022-02-10 03:27:02,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:02,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330902872] [2022-02-10 03:27:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:02,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:02,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:02,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330902872] [2022-02-10 03:27:02,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330902872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:02,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443836436] [2022-02-10 03:27:02,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:27:02,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:02,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:02,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:02,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 03:27:02,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:27:02,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:27:02,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-10 03:27:02,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:02,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:02,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443836436] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:02,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:02,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-10 03:27:02,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98731372] [2022-02-10 03:27:02,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:02,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:27:02,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:27:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:27:02,238 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:02,257 INFO L93 Difference]: Finished difference Result 179 states and 239 transitions. [2022-02-10 03:27:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:27:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 03:27:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:02,258 INFO L225 Difference]: With dead ends: 179 [2022-02-10 03:27:02,258 INFO L226 Difference]: Without dead ends: 165 [2022-02-10 03:27:02,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:27:02,259 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:02,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 76 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:27:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-10 03:27:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 131. [2022-02-10 03:27:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4230769230769231) internal successors, (185), 130 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 185 transitions. [2022-02-10 03:27:02,266 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 185 transitions. Word has length 28 [2022-02-10 03:27:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:02,267 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 185 transitions. [2022-02-10 03:27:02,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 185 transitions. [2022-02-10 03:27:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-10 03:27:02,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:02,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:02,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-10 03:27:02,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:02,490 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:02,490 INFO L85 PathProgramCache]: Analyzing trace with hash 388329093, now seen corresponding path program 3 times [2022-02-10 03:27:02,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:02,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510626016] [2022-02-10 03:27:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:02,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:02,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:02,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510626016] [2022-02-10 03:27:02,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510626016] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:02,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981245239] [2022-02-10 03:27:02,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:27:02,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:02,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:02,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:02,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 03:27:02,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:27:02,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:27:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:27:02,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:03,103 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-10 03:27:03,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-10 03:27:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:03,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:03,472 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:27:03,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-02-10 03:27:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:03,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981245239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:03,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:03,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-10 03:27:03,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694495016] [2022-02-10 03:27:03,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:03,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-10 03:27:03,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:03,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-10 03:27:03,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:27:03,740 INFO L87 Difference]: Start difference. First operand 131 states and 185 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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) [2022-02-10 03:27:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:09,089 INFO L93 Difference]: Finished difference Result 520 states and 767 transitions. [2022-02-10 03:27:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-10 03:27:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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 31 [2022-02-10 03:27:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:09,091 INFO L225 Difference]: With dead ends: 520 [2022-02-10 03:27:09,091 INFO L226 Difference]: Without dead ends: 414 [2022-02-10 03:27:09,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8700 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4169, Invalid=20323, Unknown=0, NotChecked=0, Total=24492 [2022-02-10 03:27:09,098 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 437 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:09,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 192 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-10 03:27:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-10 03:27:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 156. [2022-02-10 03:27:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.4451612903225806) internal successors, (224), 155 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:09,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 224 transitions. [2022-02-10 03:27:09,106 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 224 transitions. Word has length 31 [2022-02-10 03:27:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:09,106 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 224 transitions. [2022-02-10 03:27:09,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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) [2022-02-10 03:27:09,107 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 224 transitions. [2022-02-10 03:27:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-10 03:27:09,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:09,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:09,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-10 03:27:09,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:09,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash -540625471, now seen corresponding path program 4 times [2022-02-10 03:27:09,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:09,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125353692] [2022-02-10 03:27:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:09,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:27:09,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:09,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125353692] [2022-02-10 03:27:09,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125353692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:09,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729464769] [2022-02-10 03:27:09,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:27:09,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:09,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:09,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:09,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 03:27:09,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:27:09,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:27:09,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:27:09,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:09,871 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-10 03:27:09,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-10 03:27:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:09,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:10,160 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:27:10,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-02-10 03:27:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:10,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729464769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:10,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:10,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-02-10 03:27:10,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742094680] [2022-02-10 03:27:10,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:10,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:27:10,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:10,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:27:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:27:10,399 INFO L87 Difference]: Start difference. First operand 156 states and 224 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:15,107 INFO L93 Difference]: Finished difference Result 756 states and 1105 transitions. [2022-02-10 03:27:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-10 03:27:15,111 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-10 03:27:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:15,114 INFO L225 Difference]: With dead ends: 756 [2022-02-10 03:27:15,114 INFO L226 Difference]: Without dead ends: 662 [2022-02-10 03:27:15,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8109 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3883, Invalid=17579, Unknown=0, NotChecked=0, Total=21462 [2022-02-10 03:27:15,120 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 372 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:15,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 284 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-10 03:27:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-10 03:27:15,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 213. [2022-02-10 03:27:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5) internal successors, (318), 212 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 318 transitions. [2022-02-10 03:27:15,129 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 318 transitions. Word has length 31 [2022-02-10 03:27:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:15,130 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 318 transitions. [2022-02-10 03:27:15,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 318 transitions. [2022-02-10 03:27:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-10 03:27:15,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:15,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:15,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-10 03:27:15,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:15,347 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash 687793386, now seen corresponding path program 5 times [2022-02-10 03:27:15,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:15,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599945047] [2022-02-10 03:27:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:15,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:15,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:15,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599945047] [2022-02-10 03:27:15,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599945047] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:15,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925425763] [2022-02-10 03:27:15,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:27:15,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:15,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:15,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:27:15,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:27:15,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:27:15,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:27:15,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:15,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:15,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925425763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:15,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:15,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-10 03:27:15,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983969243] [2022-02-10 03:27:15,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:15,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 03:27:15,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 03:27:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:27:15,531 INFO L87 Difference]: Start difference. First operand 213 states and 318 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:15,557 INFO L93 Difference]: Finished difference Result 408 states and 589 transitions. [2022-02-10 03:27:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:27:15,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-10 03:27:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:15,559 INFO L225 Difference]: With dead ends: 408 [2022-02-10 03:27:15,559 INFO L226 Difference]: Without dead ends: 390 [2022-02-10 03:27:15,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:27:15,560 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:15,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 114 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:27:15,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-10 03:27:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 287. [2022-02-10 03:27:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.5174825174825175) internal successors, (434), 286 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 434 transitions. [2022-02-10 03:27:15,568 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 434 transitions. Word has length 34 [2022-02-10 03:27:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:15,568 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 434 transitions. [2022-02-10 03:27:15,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 434 transitions. [2022-02-10 03:27:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:27:15,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:15,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:15,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-10 03:27:15,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:15,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 893255236, now seen corresponding path program 6 times [2022-02-10 03:27:15,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:15,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141727807] [2022-02-10 03:27:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:15,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:16,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:16,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141727807] [2022-02-10 03:27:16,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141727807] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:16,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745408602] [2022-02-10 03:27:16,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:27:16,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:16,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:16,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:16,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 03:27:16,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:27:16,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:27:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:27:16,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:16,602 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-10 03:27:16,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-10 03:27:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:16,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:17,144 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:27:17,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-10 03:27:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:17,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745408602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:17,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:17,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-02-10 03:27:17,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459132729] [2022-02-10 03:27:17,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:17,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:27:17,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:27:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:27:17,764 INFO L87 Difference]: Start difference. First operand 287 states and 434 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:28,325 INFO L93 Difference]: Finished difference Result 1431 states and 2098 transitions. [2022-02-10 03:27:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-02-10 03:27:28,325 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:27:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:28,330 INFO L225 Difference]: With dead ends: 1431 [2022-02-10 03:27:28,330 INFO L226 Difference]: Without dead ends: 1311 [2022-02-10 03:27:28,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28256 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=10899, Invalid=60657, Unknown=0, NotChecked=0, Total=71556 [2022-02-10 03:27:28,345 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 755 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:28,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 479 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-10 03:27:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-02-10 03:27:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 365. [2022-02-10 03:27:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5384615384615385) internal successors, (560), 364 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 560 transitions. [2022-02-10 03:27:28,362 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 560 transitions. Word has length 37 [2022-02-10 03:27:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:28,362 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 560 transitions. [2022-02-10 03:27:28,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:28,362 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 560 transitions. [2022-02-10 03:27:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:27:28,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:28,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:28,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 03:27:28,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:28,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:28,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1712443004, now seen corresponding path program 7 times [2022-02-10 03:27:28,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:28,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095845298] [2022-02-10 03:27:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:28,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:28,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:28,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095845298] [2022-02-10 03:27:28,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095845298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:28,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804466095] [2022-02-10 03:27:28,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:27:28,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:28,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:28,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:28,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 03:27:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:28,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:27:28,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:29,407 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-10 03:27:29,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-10 03:27:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:29,918 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:27:29,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-10 03:27:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:30,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804466095] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:30,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:30,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-02-10 03:27:30,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601588926] [2022-02-10 03:27:30,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:30,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:27:30,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:30,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:27:30,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:27:30,391 INFO L87 Difference]: Start difference. First operand 365 states and 560 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:44,650 INFO L93 Difference]: Finished difference Result 1462 states and 2118 transitions. [2022-02-10 03:27:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-02-10 03:27:44,650 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:27:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:44,655 INFO L225 Difference]: With dead ends: 1462 [2022-02-10 03:27:44,656 INFO L226 Difference]: Without dead ends: 1435 [2022-02-10 03:27:44,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41368 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=14971, Invalid=86471, Unknown=0, NotChecked=0, Total=101442 [2022-02-10 03:27:44,662 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 411 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 3377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:44,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 603 Invalid, 3377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-10 03:27:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-02-10 03:27:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 390. [2022-02-10 03:27:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.5424164524421593) internal successors, (600), 389 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 600 transitions. [2022-02-10 03:27:44,677 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 600 transitions. Word has length 37 [2022-02-10 03:27:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:44,677 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 600 transitions. [2022-02-10 03:27:44,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 600 transitions. [2022-02-10 03:27:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:27:44,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:44,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:44,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-10 03:27:44,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:44,892 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:44,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1117872760, now seen corresponding path program 8 times [2022-02-10 03:27:44,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:44,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430069112] [2022-02-10 03:27:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:44,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:27:45,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:45,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430069112] [2022-02-10 03:27:45,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430069112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:45,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526355944] [2022-02-10 03:27:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:27:45,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:45,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:45,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 03:27:45,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:27:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:27:45,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:27:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:45,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:45,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:45,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:45,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:45,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-02-10 03:27:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:45,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:46,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:46,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:46,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:46,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:46,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:46,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:27:46,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 94 [2022-02-10 03:27:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:46,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526355944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:46,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:46,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-10 03:27:46,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340610732] [2022-02-10 03:27:46,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:46,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:27:46,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:27:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:27:46,982 INFO L87 Difference]: Start difference. First operand 390 states and 600 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:51,170 INFO L93 Difference]: Finished difference Result 1078 states and 1741 transitions. [2022-02-10 03:27:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-10 03:27:51,171 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:27:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:51,178 INFO L225 Difference]: With dead ends: 1078 [2022-02-10 03:27:51,178 INFO L226 Difference]: Without dead ends: 1058 [2022-02-10 03:27:51,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8029 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3629, Invalid=18423, Unknown=0, NotChecked=0, Total=22052 [2022-02-10 03:27:51,183 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 226 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1083 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:51,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 267 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 516 Invalid, 0 Unknown, 1083 Unchecked, 0.3s Time] [2022-02-10 03:27:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-10 03:27:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 584. [2022-02-10 03:27:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.6260720411663807) internal successors, (948), 583 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 948 transitions. [2022-02-10 03:27:51,198 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 948 transitions. Word has length 37 [2022-02-10 03:27:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:51,199 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 948 transitions. [2022-02-10 03:27:51,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 948 transitions. [2022-02-10 03:27:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:27:51,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:51,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:51,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-10 03:27:51,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-10 03:27:51,416 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash -625525692, now seen corresponding path program 9 times [2022-02-10 03:27:51,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:51,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362094362] [2022-02-10 03:27:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:51,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:27:51,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:51,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362094362] [2022-02-10 03:27:51,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362094362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:51,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159982381] [2022-02-10 03:27:51,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:27:51,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:51,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:51,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:51,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 03:27:51,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:27:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:27:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:27:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:52,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:52,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:52,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:52,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:27:52,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:52,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-02-10 03:27:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:52,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:52,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:52,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:52,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:52,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:52,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:27:53,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:27:53,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 94 [2022-02-10 03:27:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:53,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159982381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:27:53,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:27:53,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-10 03:27:53,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537419574] [2022-02-10 03:27:53,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:27:53,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:27:53,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:27:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:27:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1688, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:27:53,449 INFO L87 Difference]: Start difference. First operand 584 states and 948 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:27:58,351 INFO L93 Difference]: Finished difference Result 1414 states and 2314 transitions. [2022-02-10 03:27:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-10 03:27:58,351 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:27:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:27:58,356 INFO L225 Difference]: With dead ends: 1414 [2022-02-10 03:27:58,356 INFO L226 Difference]: Without dead ends: 1399 [2022-02-10 03:27:58,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10925 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4628, Invalid=25128, Unknown=0, NotChecked=0, Total=29756 [2022-02-10 03:27:58,362 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 290 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1059 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:27:58,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 407 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1138 Invalid, 0 Unknown, 1059 Unchecked, 0.6s Time] [2022-02-10 03:27:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-02-10 03:27:58,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 693. [2022-02-10 03:27:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.6589595375722543) internal successors, (1148), 692 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1148 transitions. [2022-02-10 03:27:58,402 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1148 transitions. Word has length 37 [2022-02-10 03:27:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:27:58,402 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1148 transitions. [2022-02-10 03:27:58,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:27:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1148 transitions. [2022-02-10 03:27:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:27:58,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:27:58,404 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:27:58,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 03:27:58,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:58,611 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:27:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:27:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1367946808, now seen corresponding path program 10 times [2022-02-10 03:27:58,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:27:58,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118769471] [2022-02-10 03:27:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:27:58,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:27:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:27:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:27:58,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:27:58,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118769471] [2022-02-10 03:27:58,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118769471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:27:58,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308551038] [2022-02-10 03:27:58,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:27:58,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:27:58,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:27:58,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:27:58,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 03:27:58,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:27:58,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:27:58,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:27:58,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:27:59,318 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-10 03:27:59,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-10 03:27:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:27:59,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:27:59,778 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:27:59,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-10 03:28:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:28:00,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308551038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:28:00,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:28:00,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-10 03:28:00,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621759373] [2022-02-10 03:28:00,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:28:00,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:28:00,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:28:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:28:00,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:28:00,294 INFO L87 Difference]: Start difference. First operand 693 states and 1148 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:28:16,621 INFO L93 Difference]: Finished difference Result 3016 states and 4683 transitions. [2022-02-10 03:28:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2022-02-10 03:28:16,621 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:28:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:28:16,629 INFO L225 Difference]: With dead ends: 3016 [2022-02-10 03:28:16,629 INFO L226 Difference]: Without dead ends: 2770 [2022-02-10 03:28:16,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53878 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=18662, Invalid=104890, Unknown=0, NotChecked=0, Total=123552 [2022-02-10 03:28:16,640 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 589 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 3688 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 4324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 3688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:28:16,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 1004 Invalid, 4324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 3688 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-10 03:28:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2022-02-10 03:28:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 498. [2022-02-10 03:28:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.5975855130784709) internal successors, (794), 497 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 794 transitions. [2022-02-10 03:28:16,666 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 794 transitions. Word has length 37 [2022-02-10 03:28:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:28:16,666 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 794 transitions. [2022-02-10 03:28:16,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 794 transitions. [2022-02-10 03:28:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:28:16,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:28:16,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:28:16,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 03:28:16,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-10 03:28:16,882 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:28:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:28:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1550576320, now seen corresponding path program 11 times [2022-02-10 03:28:16,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:28:16,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708399328] [2022-02-10 03:28:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:28:16,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:28:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:28:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:28:17,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:28:17,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708399328] [2022-02-10 03:28:17,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708399328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:28:17,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626943013] [2022-02-10 03:28:17,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:28:17,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:28:17,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:28:17,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:28:17,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 03:28:17,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:28:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:28:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:28:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:28:17,682 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-10 03:28:17,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-10 03:28:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:28:17,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:28:18,153 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:28:18,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-10 03:28:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:28:18,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626943013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:28:18,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:28:18,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-10 03:28:18,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930819826] [2022-02-10 03:28:18,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:28:18,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:28:18,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:28:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:28:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:28:18,731 INFO L87 Difference]: Start difference. First operand 498 states and 794 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:28:35,762 INFO L93 Difference]: Finished difference Result 2205 states and 3284 transitions. [2022-02-10 03:28:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2022-02-10 03:28:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:28:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:28:35,768 INFO L225 Difference]: With dead ends: 2205 [2022-02-10 03:28:35,768 INFO L226 Difference]: Without dead ends: 2163 [2022-02-10 03:28:35,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57822 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=18570, Invalid=113562, Unknown=0, NotChecked=0, Total=132132 [2022-02-10 03:28:35,777 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 526 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 4033 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 4596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 4033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:28:35,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 1036 Invalid, 4596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 4033 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-10 03:28:35,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-02-10 03:28:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 577. [2022-02-10 03:28:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.6232638888888888) internal successors, (935), 576 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 935 transitions. [2022-02-10 03:28:35,800 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 935 transitions. Word has length 37 [2022-02-10 03:28:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:28:35,801 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 935 transitions. [2022-02-10 03:28:35,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 935 transitions. [2022-02-10 03:28:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:28:35,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:28:35,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:28:35,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-10 03:28:36,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-10 03:28:36,021 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:28:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:28:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1456721178, now seen corresponding path program 12 times [2022-02-10 03:28:36,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:28:36,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77040768] [2022-02-10 03:28:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:28:36,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:28:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:28:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:28:36,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:28:36,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77040768] [2022-02-10 03:28:36,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77040768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:28:36,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520103803] [2022-02-10 03:28:36,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:28:36,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:28:36,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:28:36,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:28:36,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 03:28:36,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:28:36,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:28:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:28:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:28:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:28:36,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:28:36,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:28:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:28:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:36,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-10 03:28:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:28:36,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:28:37,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:37,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:37,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:37,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:37,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:37,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:37,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:28:37,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:28:37,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 98 [2022-02-10 03:28:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:28:37,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520103803] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:28:37,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:28:37,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-02-10 03:28:37,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446555087] [2022-02-10 03:28:37,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:28:37,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-10 03:28:37,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:28:37,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-10 03:28:37,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:28:37,681 INFO L87 Difference]: Start difference. First operand 577 states and 935 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:28:55,194 INFO L93 Difference]: Finished difference Result 3247 states and 4969 transitions. [2022-02-10 03:28:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-02-10 03:28:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:28:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:28:55,202 INFO L225 Difference]: With dead ends: 3247 [2022-02-10 03:28:55,202 INFO L226 Difference]: Without dead ends: 3057 [2022-02-10 03:28:55,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50673 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=18273, Invalid=92283, Unknown=0, NotChecked=0, Total=110556 [2022-02-10 03:28:55,211 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 983 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 962 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 4968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:28:55,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1088 Invalid, 4968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 3681 Invalid, 0 Unknown, 325 Unchecked, 1.9s Time] [2022-02-10 03:28:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2022-02-10 03:28:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 879. [2022-02-10 03:28:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.6924829157175398) internal successors, (1486), 878 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1486 transitions. [2022-02-10 03:28:55,240 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1486 transitions. Word has length 37 [2022-02-10 03:28:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:28:55,240 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1486 transitions. [2022-02-10 03:28:55,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:28:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1486 transitions. [2022-02-10 03:28:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:28:55,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:28:55,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:28:55,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-10 03:28:55,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-10 03:28:55,465 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:28:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:28:55,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2059691200, now seen corresponding path program 13 times [2022-02-10 03:28:55,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:28:55,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402058656] [2022-02-10 03:28:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:28:55,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:28:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:28:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:28:55,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:28:55,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402058656] [2022-02-10 03:28:55,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402058656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:28:55,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285532145] [2022-02-10 03:28:55,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:28:55,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:28:55,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:28:55,722 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:28:55,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 03:28:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:28:55,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:28:55,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:28:56,239 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-10 03:28:56,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-10 03:28:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:28:56,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:28:56,684 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:28:56,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-10 03:28:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:28:57,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285532145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:28:57,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:28:57,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-02-10 03:28:57,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364060529] [2022-02-10 03:28:57,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:28:57,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:28:57,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:28:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:28:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:28:57,163 INFO L87 Difference]: Start difference. First operand 879 states and 1486 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:29:04,630 INFO L93 Difference]: Finished difference Result 3536 states and 5692 transitions. [2022-02-10 03:29:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-02-10 03:29:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:29:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:29:04,641 INFO L225 Difference]: With dead ends: 3536 [2022-02-10 03:29:04,641 INFO L226 Difference]: Without dead ends: 3370 [2022-02-10 03:29:04,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15501 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6339, Invalid=35481, Unknown=0, NotChecked=0, Total=41820 [2022-02-10 03:29:04,645 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 509 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:29:04,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 459 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-10 03:29:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2022-02-10 03:29:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 1018. [2022-02-10 03:29:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.6991150442477876) internal successors, (1728), 1017 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1728 transitions. [2022-02-10 03:29:04,673 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1728 transitions. Word has length 37 [2022-02-10 03:29:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:29:04,674 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1728 transitions. [2022-02-10 03:29:04,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1728 transitions. [2022-02-10 03:29:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:29:04,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:29:04,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:29:04,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-10 03:29:04,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-10 03:29:04,892 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:29:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:29:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1672076424, now seen corresponding path program 14 times [2022-02-10 03:29:04,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:29:04,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189443075] [2022-02-10 03:29:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:29:04,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:29:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:29:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:05,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:29:05,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189443075] [2022-02-10 03:29:05,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189443075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:29:05,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312030283] [2022-02-10 03:29:05,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:29:05,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:29:05,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:29:05,181 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:29:05,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 03:29:05,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:29:05,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:29:05,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:29:05,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:29:05,694 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-10 03:29:05,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-10 03:29:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:05,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:29:06,177 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:29:06,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-10 03:29:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:06,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312030283] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:29:06,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:29:06,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-02-10 03:29:06,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392883863] [2022-02-10 03:29:06,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:29:06,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:29:06,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:29:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:29:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:29:06,654 INFO L87 Difference]: Start difference. First operand 1018 states and 1728 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:29:15,175 INFO L93 Difference]: Finished difference Result 2658 states and 4282 transitions. [2022-02-10 03:29:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-02-10 03:29:15,175 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:29:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:29:15,183 INFO L225 Difference]: With dead ends: 2658 [2022-02-10 03:29:15,183 INFO L226 Difference]: Without dead ends: 2604 [2022-02-10 03:29:15,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15734 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=6768, Invalid=37542, Unknown=0, NotChecked=0, Total=44310 [2022-02-10 03:29:15,188 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 371 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:29:15,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 393 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-10 03:29:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2022-02-10 03:29:15,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 986. [2022-02-10 03:29:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.6791878172588832) internal successors, (1654), 985 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1654 transitions. [2022-02-10 03:29:15,213 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1654 transitions. Word has length 37 [2022-02-10 03:29:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:29:15,213 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1654 transitions. [2022-02-10 03:29:15,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1654 transitions. [2022-02-10 03:29:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:29:15,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:29:15,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:29:15,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-10 03:29:15,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:29:15,440 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:29:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:29:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1511907652, now seen corresponding path program 15 times [2022-02-10 03:29:15,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:29:15,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406753402] [2022-02-10 03:29:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:29:15,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:29:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:29:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:29:15,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:29:15,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406753402] [2022-02-10 03:29:15,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406753402] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:29:15,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480286408] [2022-02-10 03:29:15,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:29:15,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:29:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:29:15,660 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:29:15,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 03:29:15,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:29:15,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:29:15,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:29:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:29:16,143 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-10 03:29:16,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-10 03:29:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:16,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:29:16,594 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:29:16,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-10 03:29:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:17,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480286408] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:29:17,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:29:17,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-10 03:29:17,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136081198] [2022-02-10 03:29:17,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:29:17,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:29:17,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:29:17,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:29:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:29:17,155 INFO L87 Difference]: Start difference. First operand 986 states and 1654 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:29:30,872 INFO L93 Difference]: Finished difference Result 3564 states and 5705 transitions. [2022-02-10 03:29:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-02-10 03:29:30,872 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:29:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:29:30,879 INFO L225 Difference]: With dead ends: 3564 [2022-02-10 03:29:30,880 INFO L226 Difference]: Without dead ends: 3509 [2022-02-10 03:29:30,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37449 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=13110, Invalid=75396, Unknown=0, NotChecked=0, Total=88506 [2022-02-10 03:29:30,888 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 494 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:29:30,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 373 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-10 03:29:30,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-02-10 03:29:30,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 1041. [2022-02-10 03:29:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.6807692307692308) internal successors, (1748), 1040 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1748 transitions. [2022-02-10 03:29:30,916 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1748 transitions. Word has length 37 [2022-02-10 03:29:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:29:30,917 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1748 transitions. [2022-02-10 03:29:30,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1748 transitions. [2022-02-10 03:29:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-10 03:29:30,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:29:30,919 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:29:30,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-10 03:29:31,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-10 03:29:31,132 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:29:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:29:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1967048907, now seen corresponding path program 16 times [2022-02-10 03:29:31,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:29:31,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020906739] [2022-02-10 03:29:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:29:31,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:29:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:29:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:31,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:29:31,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020906739] [2022-02-10 03:29:31,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020906739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:29:31,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886158602] [2022-02-10 03:29:31,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:29:31,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:29:31,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:29:31,173 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:29:31,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 03:29:31,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:29:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:29:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 03:29:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:29:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:31,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:29:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:31,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886158602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:29:31,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:29:31,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-10 03:29:31,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601063741] [2022-02-10 03:29:31,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:29:31,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 03:29:31,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:29:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 03:29:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:29:31,324 INFO L87 Difference]: Start difference. First operand 1041 states and 1748 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:29:31,352 INFO L93 Difference]: Finished difference Result 1625 states and 2695 transitions. [2022-02-10 03:29:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 03:29:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-10 03:29:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:29:31,356 INFO L225 Difference]: With dead ends: 1625 [2022-02-10 03:29:31,356 INFO L226 Difference]: Without dead ends: 1603 [2022-02-10 03:29:31,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:29:31,357 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:29:31,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 118 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:29:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-02-10 03:29:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1363. [2022-02-10 03:29:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.7011747430249633) internal successors, (2317), 1362 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2317 transitions. [2022-02-10 03:29:31,378 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2317 transitions. Word has length 40 [2022-02-10 03:29:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:29:31,379 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 2317 transitions. [2022-02-10 03:29:31,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:29:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2317 transitions. [2022-02-10 03:29:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:29:31,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:29:31,381 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:29:31,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-10 03:29:31,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:29:31,604 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:29:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:29:31,605 INFO L85 PathProgramCache]: Analyzing trace with hash 720893605, now seen corresponding path program 17 times [2022-02-10 03:29:31,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:29:31,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680330854] [2022-02-10 03:29:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:29:31,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:29:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:29:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:31,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:29:31,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680330854] [2022-02-10 03:29:31,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680330854] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:29:31,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126550116] [2022-02-10 03:29:31,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:29:31,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:29:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:29:31,963 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:29:31,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 03:29:31,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:29:31,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:29:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:29:31,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:29:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:29:33,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-02-10 03:29:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:33,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:29:33,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:29:33,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:29:33,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 49 treesize of output 153 [2022-02-10 03:29:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:29:34,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126550116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:29:34,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:29:34,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:29:34,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705199248] [2022-02-10 03:29:34,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:29:34,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:29:34,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:29:34,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:29:34,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2805, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:29:34,775 INFO L87 Difference]: Start difference. First operand 1363 states and 2317 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:30:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:30:02,002 INFO L93 Difference]: Finished difference Result 4318 states and 6636 transitions. [2022-02-10 03:30:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-02-10 03:30:02,002 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:30:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:30:02,009 INFO L225 Difference]: With dead ends: 4318 [2022-02-10 03:30:02,009 INFO L226 Difference]: Without dead ends: 4172 [2022-02-10 03:30:02,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 75 SyntacticMatches, 12 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84416 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=25700, Invalid=156202, Unknown=0, NotChecked=0, Total=181902 [2022-02-10 03:30:02,024 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 918 mSDsluCounter, 2123 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 7741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4565 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:30:02,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1545 Invalid, 7741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 2692 Invalid, 0 Unknown, 4565 Unchecked, 1.3s Time] [2022-02-10 03:30:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2022-02-10 03:30:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 1672. [2022-02-10 03:30:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.698982645122681) internal successors, (2839), 1671 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:30:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2839 transitions. [2022-02-10 03:30:02,064 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2839 transitions. Word has length 43 [2022-02-10 03:30:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:30:02,064 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2839 transitions. [2022-02-10 03:30:02,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:30:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2839 transitions. [2022-02-10 03:30:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:30:02,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:30:02,067 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:30:02,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-10 03:30:02,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:30:02,291 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:30:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:30:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1420185947, now seen corresponding path program 18 times [2022-02-10 03:30:02,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:30:02,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747333618] [2022-02-10 03:30:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:30:02,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:30:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:30:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:30:02,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:30:02,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747333618] [2022-02-10 03:30:02,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747333618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:30:02,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320089380] [2022-02-10 03:30:02,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:30:02,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:30:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:30:02,678 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:30:02,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 03:30:02,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:30:02,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:30:02,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:30:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:30:03,477 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:30:03,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:30:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:30:03,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:30:04,232 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:30:04,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:30:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:30:05,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320089380] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:30:05,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:30:05,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:30:05,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994340792] [2022-02-10 03:30:05,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:30:05,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:30:05,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:30:05,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:30:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=2907, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:30:05,533 INFO L87 Difference]: Start difference. First operand 1672 states and 2839 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:30:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:30:38,392 INFO L93 Difference]: Finished difference Result 5434 states and 8419 transitions. [2022-02-10 03:30:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 492 states. [2022-02-10 03:30:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:30:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:30:38,399 INFO L225 Difference]: With dead ends: 5434 [2022-02-10 03:30:38,399 INFO L226 Difference]: Without dead ends: 5109 [2022-02-10 03:30:38,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 544 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133308 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=40195, Invalid=257375, Unknown=0, NotChecked=0, Total=297570 [2022-02-10 03:30:38,420 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 668 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 7091 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 7723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 7091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:30:38,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1147 Invalid, 7723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 7091 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-10 03:30:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5109 states. [2022-02-10 03:30:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5109 to 1794. [2022-02-10 03:30:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 1.6965978806469604) internal successors, (3042), 1793 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:30:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 3042 transitions. [2022-02-10 03:30:38,460 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 3042 transitions. Word has length 43 [2022-02-10 03:30:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:30:38,460 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 3042 transitions. [2022-02-10 03:30:38,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:30:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 3042 transitions. [2022-02-10 03:30:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:30:38,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:30:38,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:30:38,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 03:30:38,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:30:38,679 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:30:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:30:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1139514221, now seen corresponding path program 19 times [2022-02-10 03:30:38,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:30:38,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563788509] [2022-02-10 03:30:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:30:38,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:30:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:30:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:30:39,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:30:39,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563788509] [2022-02-10 03:30:39,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563788509] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:30:39,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219748412] [2022-02-10 03:30:39,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:30:39,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:30:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:30:39,034 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:30:39,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 03:30:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:30:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:30:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:30:39,784 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:30:39,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:30:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:30:39,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:30:40,559 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:30:40,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:30:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:30:41,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219748412] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:30:41,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:30:41,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:30:41,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292921506] [2022-02-10 03:30:41,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:30:41,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:30:41,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:30:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:30:41,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2914, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:30:41,763 INFO L87 Difference]: Start difference. First operand 1794 states and 3042 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:31:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:31:14,529 INFO L93 Difference]: Finished difference Result 4613 states and 7117 transitions. [2022-02-10 03:31:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 489 states. [2022-02-10 03:31:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:31:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:31:14,537 INFO L225 Difference]: With dead ends: 4613 [2022-02-10 03:31:14,537 INFO L226 Difference]: Without dead ends: 4581 [2022-02-10 03:31:14,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 541 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129657 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=39582, Invalid=254724, Unknown=0, NotChecked=0, Total=294306 [2022-02-10 03:31:14,611 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 696 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 4945 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 5579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 4945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:31:14,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 884 Invalid, 5579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 4945 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-10 03:31:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2022-02-10 03:31:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 1868. [2022-02-10 03:31:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.6946973754686663) internal successors, (3164), 1867 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:31:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3164 transitions. [2022-02-10 03:31:14,647 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3164 transitions. Word has length 43 [2022-02-10 03:31:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:31:14,647 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 3164 transitions. [2022-02-10 03:31:14,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:31:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3164 transitions. [2022-02-10 03:31:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:31:14,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:31:14,651 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:31:14,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 03:31:14,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:31:14,876 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:31:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:31:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1527128997, now seen corresponding path program 20 times [2022-02-10 03:31:14,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:31:14,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62407473] [2022-02-10 03:31:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:31:14,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:31:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:31:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:31:15,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:31:15,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62407473] [2022-02-10 03:31:15,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62407473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:31:15,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004156124] [2022-02-10 03:31:15,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:31:15,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:31:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:31:15,256 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:31:15,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 03:31:15,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:31:15,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:31:15,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:31:15,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:31:16,023 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:31:16,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:31:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:31:16,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:31:16,827 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:31:16,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:31:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:31:17,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004156124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:31:17,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:31:17,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:31:17,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560148548] [2022-02-10 03:31:17,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:31:17,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:31:17,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:31:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:31:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2922, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:31:17,900 INFO L87 Difference]: Start difference. First operand 1868 states and 3164 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:31:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:31:51,678 INFO L93 Difference]: Finished difference Result 4479 states and 6974 transitions. [2022-02-10 03:31:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 505 states. [2022-02-10 03:31:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:31:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:31:51,688 INFO L225 Difference]: With dead ends: 4479 [2022-02-10 03:31:51,688 INFO L226 Difference]: Without dead ends: 4452 [2022-02-10 03:31:51,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 557 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136304 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=37031, Invalid=274891, Unknown=0, NotChecked=0, Total=311922 [2022-02-10 03:31:51,713 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 626 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 5683 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 6315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 5683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:31:51,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 1037 Invalid, 6315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 5683 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-10 03:31:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4452 states. [2022-02-10 03:31:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4452 to 1992. [2022-02-10 03:31:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 1.6926167754897037) internal successors, (3370), 1991 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:31:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 3370 transitions. [2022-02-10 03:31:51,754 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 3370 transitions. Word has length 43 [2022-02-10 03:31:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:31:51,754 INFO L470 AbstractCegarLoop]: Abstraction has 1992 states and 3370 transitions. [2022-02-10 03:31:51,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:31:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 3370 transitions. [2022-02-10 03:31:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:31:51,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:31:51,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:31:51,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-10 03:31:51,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-10 03:31:51,980 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:31:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:31:51,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2077562711, now seen corresponding path program 21 times [2022-02-10 03:31:51,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:31:51,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173759188] [2022-02-10 03:31:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:31:51,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:31:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:31:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:31:52,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:31:52,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173759188] [2022-02-10 03:31:52,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173759188] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:31:52,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661355269] [2022-02-10 03:31:52,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:31:52,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:31:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:31:52,296 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:31:52,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 03:31:52,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:31:52,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:31:52,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-10 03:31:52,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:31:53,065 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:31:53,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:31:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:31:53,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:31:53,826 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:31:53,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 52 treesize of output 176 [2022-02-10 03:31:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:31:55,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661355269] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:31:55,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:31:55,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2022-02-10 03:31:55,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432461673] [2022-02-10 03:31:55,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:31:55,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-10 03:31:55,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:31:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-10 03:31:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2022-02-10 03:31:55,704 INFO L87 Difference]: Start difference. First operand 1992 states and 3370 transitions. Second operand has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:37,608 INFO L93 Difference]: Finished difference Result 7468 states and 11502 transitions. [2022-02-10 03:32:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 610 states. [2022-02-10 03:32:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:32:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:37,618 INFO L225 Difference]: With dead ends: 7468 [2022-02-10 03:32:37,618 INFO L226 Difference]: Without dead ends: 7173 [2022-02-10 03:32:37,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202914 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=53559, Invalid=385347, Unknown=0, NotChecked=0, Total=438906 [2022-02-10 03:32:37,643 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 698 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 7784 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 8528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 7784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:37,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1639 Invalid, 8528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 7784 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-10 03:32:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2022-02-10 03:32:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 2213. [2022-02-10 03:32:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 1.6989150090415914) internal successors, (3758), 2212 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3758 transitions. [2022-02-10 03:32:37,694 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3758 transitions. Word has length 43 [2022-02-10 03:32:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:37,694 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 3758 transitions. [2022-02-10 03:32:37,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3758 transitions. [2022-02-10 03:32:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:32:37,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:37,699 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:37,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:37,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-10 03:32:37,911 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:32:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1689947935, now seen corresponding path program 22 times [2022-02-10 03:32:37,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:37,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985773739] [2022-02-10 03:32:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:37,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:38,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:38,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985773739] [2022-02-10 03:32:38,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985773739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:38,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813021888] [2022-02-10 03:32:38,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:32:38,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:38,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:38,272 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:38,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 03:32:38,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:32:38,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:38,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:32:38,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:39,035 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:32:39,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:32:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:39,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:39,889 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:32:39,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:32:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:42,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813021888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:42,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:42,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2022-02-10 03:32:42,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697718179] [2022-02-10 03:32:42,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:42,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-10 03:32:42,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-10 03:32:42,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2837, Unknown=0, NotChecked=0, Total=3192 [2022-02-10 03:32:42,132 INFO L87 Difference]: Start difference. First operand 2213 states and 3758 transitions. Second operand has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:24,186 INFO L93 Difference]: Finished difference Result 6167 states and 9701 transitions. [2022-02-10 03:33:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 568 states. [2022-02-10 03:33:24,187 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:33:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:24,193 INFO L225 Difference]: With dead ends: 6167 [2022-02-10 03:33:24,194 INFO L226 Difference]: Without dead ends: 6115 [2022-02-10 03:33:24,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 619 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173953 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=44520, Invalid=340500, Unknown=0, NotChecked=0, Total=385020 [2022-02-10 03:33:24,214 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 718 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 6367 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 7180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 6367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:24,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1582 Invalid, 7180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 6367 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-10 03:33:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2022-02-10 03:33:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 2429. [2022-02-10 03:33:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 1.7038714991762767) internal successors, (4137), 2428 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 4137 transitions. [2022-02-10 03:33:24,268 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 4137 transitions. Word has length 43 [2022-02-10 03:33:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:24,268 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 4137 transitions. [2022-02-10 03:33:24,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 4137 transitions. [2022-02-10 03:33:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:24,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:24,272 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:24,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-10 03:33:24,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:24,496 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:33:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash 540468931, now seen corresponding path program 23 times [2022-02-10 03:33:24,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:24,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556432884] [2022-02-10 03:33:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:24,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:33:24,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:24,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556432884] [2022-02-10 03:33:24,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556432884] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:24,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432937797] [2022-02-10 03:33:24,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:33:24,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:24,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:24,812 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:24,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 03:33:24,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:33:24,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:33:24,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-10 03:33:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:25,595 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:33:25,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:33:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:33:25,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:26,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:26,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:26,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 135 [2022-02-10 03:33:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:33:27,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432937797] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:27,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:27,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 56 [2022-02-10 03:33:27,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150478702] [2022-02-10 03:33:27,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:27,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-10 03:33:27,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:27,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-10 03:33:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=2607, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:33:27,091 INFO L87 Difference]: Start difference. First operand 2429 states and 4137 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:34:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:34:07,402 INFO L93 Difference]: Finished difference Result 10638 states and 17350 transitions. [2022-02-10 03:34:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 475 states. [2022-02-10 03:34:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:34:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:34:07,415 INFO L225 Difference]: With dead ends: 10638 [2022-02-10 03:34:07,415 INFO L226 Difference]: Without dead ends: 10277 [2022-02-10 03:34:07,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133095 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=42344, Invalid=234858, Unknown=0, NotChecked=0, Total=277202 [2022-02-10 03:34:07,442 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 1376 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 5718 mSolverCounterSat, 1345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 7063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1345 IncrementalHoareTripleChecker+Valid, 5718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:34:07,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 1401 Invalid, 7063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1345 Valid, 5718 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-10 03:34:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10277 states. [2022-02-10 03:34:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10277 to 3494. [2022-02-10 03:34:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3493 states have (on average 1.7466361294016604) internal successors, (6101), 3493 states have internal predecessors, (6101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:34:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 6101 transitions. [2022-02-10 03:34:07,528 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 6101 transitions. Word has length 43 [2022-02-10 03:34:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:34:07,528 INFO L470 AbstractCegarLoop]: Abstraction has 3494 states and 6101 transitions. [2022-02-10 03:34:07,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:34:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 6101 transitions. [2022-02-10 03:34:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:34:07,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:34:07,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:34:07,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-10 03:34:07,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:34:07,776 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:34:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:34:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1086049285, now seen corresponding path program 24 times [2022-02-10 03:34:07,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:34:07,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944774680] [2022-02-10 03:34:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:34:07,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:34:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:34:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:34:08,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:34:08,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944774680] [2022-02-10 03:34:08,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944774680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:34:08,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053858125] [2022-02-10 03:34:08,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:34:08,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:34:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:34:08,168 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:34:08,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 03:34:08,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:34:08,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:34:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:34:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:34:09,107 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:34:09,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:34:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:34:09,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:34:09,874 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:34:09,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:34:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:34:12,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053858125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:34:12,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:34:12,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 56 [2022-02-10 03:34:12,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643596845] [2022-02-10 03:34:12,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:34:12,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-10 03:34:12,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:34:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-10 03:34:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:34:12,423 INFO L87 Difference]: Start difference. First operand 3494 states and 6101 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:34:53,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:34:53,064 INFO L93 Difference]: Finished difference Result 11103 states and 18458 transitions. [2022-02-10 03:34:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 565 states. [2022-02-10 03:34:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:34:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:34:53,077 INFO L225 Difference]: With dead ends: 11103 [2022-02-10 03:34:53,078 INFO L226 Difference]: Without dead ends: 11047 [2022-02-10 03:34:53,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 615 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176334 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=45687, Invalid=334385, Unknown=0, NotChecked=0, Total=380072 [2022-02-10 03:34:53,099 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 978 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 6670 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 7768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 6670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:34:53,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1726 Invalid, 7768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 6670 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-10 03:34:53,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11047 states. [2022-02-10 03:34:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11047 to 4379. [2022-02-10 03:34:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4378 states have (on average 1.7633622658748287) internal successors, (7720), 4378 states have internal predecessors, (7720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:34:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 7720 transitions. [2022-02-10 03:34:53,178 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 7720 transitions. Word has length 43 [2022-02-10 03:34:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:34:53,178 INFO L470 AbstractCegarLoop]: Abstraction has 4379 states and 7720 transitions. [2022-02-10 03:34:53,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:34:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 7720 transitions. [2022-02-10 03:34:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:34:53,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:34:53,184 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:34:53,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-10 03:34:53,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-10 03:34:53,405 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:34:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:34:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash 201620513, now seen corresponding path program 25 times [2022-02-10 03:34:53,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:34:53,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009971435] [2022-02-10 03:34:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:34:53,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:34:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:34:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:34:53,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:34:53,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009971435] [2022-02-10 03:34:53,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009971435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:34:53,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26255823] [2022-02-10 03:34:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:34:53,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:34:53,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:34:53,768 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:34:53,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 03:34:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:34:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:34:53,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:34:54,512 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:34:54,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:34:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:34:54,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:34:55,274 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:34:55,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:34:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:34:56,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26255823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:34:56,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:34:56,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 55 [2022-02-10 03:34:56,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546775176] [2022-02-10 03:34:56,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:34:56,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-10 03:34:56,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:34:56,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-10 03:34:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2590, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:34:56,540 INFO L87 Difference]: Start difference. First operand 4379 states and 7720 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:35:20,352 INFO L93 Difference]: Finished difference Result 14417 states and 24893 transitions. [2022-02-10 03:35:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 379 states. [2022-02-10 03:35:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:35:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:35:20,371 INFO L225 Difference]: With dead ends: 14417 [2022-02-10 03:35:20,371 INFO L226 Difference]: Without dead ends: 14199 [2022-02-10 03:35:20,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83122 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=25162, Invalid=159308, Unknown=0, NotChecked=0, Total=184470 [2022-02-10 03:35:20,385 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1024 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 5382 mSolverCounterSat, 1461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 6843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1461 IncrementalHoareTripleChecker+Valid, 5382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:35:20,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 1502 Invalid, 6843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1461 Valid, 5382 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-10 03:35:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14199 states. [2022-02-10 03:35:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14199 to 5598. [2022-02-10 03:35:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 1.7789887439699839) internal successors, (9957), 5597 states have internal predecessors, (9957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 9957 transitions. [2022-02-10 03:35:20,564 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 9957 transitions. Word has length 43 [2022-02-10 03:35:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:35:20,564 INFO L470 AbstractCegarLoop]: Abstraction has 5598 states and 9957 transitions. [2022-02-10 03:35:20,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 9957 transitions. [2022-02-10 03:35:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:35:20,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:35:20,573 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:35:20,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-10 03:35:20,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-10 03:35:20,785 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:35:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:35:20,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1573475569, now seen corresponding path program 26 times [2022-02-10 03:35:20,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:35:20,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186949038] [2022-02-10 03:35:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:35:20,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:35:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:35:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:35:21,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:35:21,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186949038] [2022-02-10 03:35:21,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186949038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:35:21,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656144452] [2022-02-10 03:35:21,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:35:21,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:35:21,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:35:21,146 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:35:21,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 03:35:21,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:35:21,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:35:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:35:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:35:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:35:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:35:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:35:22,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:22,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:35:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:35:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:35:22,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-02-10 03:35:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:35:22,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:35:23,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:35:23,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:35:23,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 49 treesize of output 153 [2022-02-10 03:35:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:35:23,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656144452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:35:23,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:35:23,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:35:23,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587695501] [2022-02-10 03:35:23,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:35:23,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:35:23,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:35:23,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:35:23,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:35:23,918 INFO L87 Difference]: Start difference. First operand 5598 states and 9957 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:35:27,917 INFO L93 Difference]: Finished difference Result 5963 states and 10424 transitions. [2022-02-10 03:35:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-10 03:35:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:35:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:35:27,923 INFO L225 Difference]: With dead ends: 5963 [2022-02-10 03:35:27,923 INFO L226 Difference]: Without dead ends: 5937 [2022-02-10 03:35:27,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2399, Invalid=14371, Unknown=0, NotChecked=0, Total=16770 [2022-02-10 03:35:27,925 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1460 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:35:27,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 486 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 607 Invalid, 0 Unknown, 1460 Unchecked, 0.3s Time] [2022-02-10 03:35:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5937 states. [2022-02-10 03:35:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5937 to 5603. [2022-02-10 03:35:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5602 states have (on average 1.7781149589432346) internal successors, (9961), 5602 states have internal predecessors, (9961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 9961 transitions. [2022-02-10 03:35:28,004 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 9961 transitions. Word has length 43 [2022-02-10 03:35:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:35:28,004 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 9961 transitions. [2022-02-10 03:35:28,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 9961 transitions. [2022-02-10 03:35:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:35:28,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:35:28,011 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:35:28,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-10 03:35:28,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-10 03:35:28,234 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:35:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:35:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1961090345, now seen corresponding path program 27 times [2022-02-10 03:35:28,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:35:28,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12135172] [2022-02-10 03:35:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:35:28,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:35:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:35:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:35:28,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:35:28,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12135172] [2022-02-10 03:35:28,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12135172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:35:28,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675133599] [2022-02-10 03:35:28,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:35:28,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:35:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:35:28,644 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:35:28,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 03:35:28,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:35:28,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:35:28,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:35:28,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:35:29,436 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:35:29,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:35:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:35:29,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:35:30,218 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:35:30,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:35:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:35:31,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675133599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:35:31,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:35:31,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:35:31,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117204685] [2022-02-10 03:35:31,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:35:31,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:35:31,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:35:31,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:35:31,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2923, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:35:31,895 INFO L87 Difference]: Start difference. First operand 5603 states and 9961 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:35:58,669 INFO L93 Difference]: Finished difference Result 14084 states and 23924 transitions. [2022-02-10 03:35:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-02-10 03:35:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:35:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:35:58,687 INFO L225 Difference]: With dead ends: 14084 [2022-02-10 03:35:58,688 INFO L226 Difference]: Without dead ends: 13874 [2022-02-10 03:35:58,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89394 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=26497, Invalid=182809, Unknown=0, NotChecked=0, Total=209306 [2022-02-10 03:35:58,704 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 651 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 3986 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 4775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 3986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:35:58,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 658 Invalid, 4775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 3986 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-10 03:35:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13874 states. [2022-02-10 03:35:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13874 to 6264. [2022-02-10 03:35:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 1.777103624461121) internal successors, (11130), 6263 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 11130 transitions. [2022-02-10 03:35:58,927 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 11130 transitions. Word has length 43 [2022-02-10 03:35:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:35:58,927 INFO L470 AbstractCegarLoop]: Abstraction has 6264 states and 11130 transitions. [2022-02-10 03:35:58,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:35:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 11130 transitions. [2022-02-10 03:35:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:35:58,932 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:35:58,933 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:35:58,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-10 03:35:59,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:35:59,147 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:35:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:35:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -320459273, now seen corresponding path program 28 times [2022-02-10 03:35:59,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:35:59,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979178182] [2022-02-10 03:35:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:35:59,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:35:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:35:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:35:59,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:35:59,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979178182] [2022-02-10 03:35:59,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979178182] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:35:59,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613602838] [2022-02-10 03:35:59,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:35:59,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:35:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:35:59,436 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:35:59,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 03:35:59,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:35:59,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:35:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:35:59,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:36:00,147 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:36:00,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:36:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:36:00,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:36:00,897 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:36:00,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:36:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:36:02,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613602838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:36:02,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:36:02,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 56 [2022-02-10 03:36:02,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222715030] [2022-02-10 03:36:02,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:36:02,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-10 03:36:02,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:36:02,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-10 03:36:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2718, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:36:02,764 INFO L87 Difference]: Start difference. First operand 6264 states and 11130 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:36:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:36:33,768 INFO L93 Difference]: Finished difference Result 19952 states and 34254 transitions. [2022-02-10 03:36:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 470 states. [2022-02-10 03:36:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:36:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:36:33,792 INFO L225 Difference]: With dead ends: 19952 [2022-02-10 03:36:33,792 INFO L226 Difference]: Without dead ends: 19664 [2022-02-10 03:36:33,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 520 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124518 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=35746, Invalid=236216, Unknown=0, NotChecked=0, Total=271962 [2022-02-10 03:36:33,806 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 637 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 5260 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 6043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 5260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:36:33,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1110 Invalid, 6043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 5260 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-10 03:36:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19664 states. [2022-02-10 03:36:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19664 to 7191. [2022-02-10 03:36:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 1.7749652294853964) internal successors, (12762), 7190 states have internal predecessors, (12762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:36:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 12762 transitions. [2022-02-10 03:36:33,955 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 12762 transitions. Word has length 43 [2022-02-10 03:36:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:36:33,955 INFO L470 AbstractCegarLoop]: Abstraction has 7191 states and 12762 transitions. [2022-02-10 03:36:33,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:36:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 12762 transitions. [2022-02-10 03:36:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:36:33,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:36:33,962 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:36:33,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-10 03:36:34,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:36:34,163 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:36:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:36:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash 67155503, now seen corresponding path program 29 times [2022-02-10 03:36:34,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:36:34,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131172911] [2022-02-10 03:36:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:36:34,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:36:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:36:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:36:34,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:36:34,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131172911] [2022-02-10 03:36:34,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131172911] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:36:34,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501308554] [2022-02-10 03:36:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:36:34,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:36:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:36:34,470 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:36:34,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 03:36:34,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:36:34,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:36:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:36:34,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:36:35,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:36:35,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:36:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:36:35,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:36:35,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:35,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:36:36,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:36:36,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 135 [2022-02-10 03:36:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:36:36,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501308554] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:36:36,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:36:36,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 56 [2022-02-10 03:36:36,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64238761] [2022-02-10 03:36:36,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:36:36,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-10 03:36:36,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:36:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-10 03:36:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:36:36,564 INFO L87 Difference]: Start difference. First operand 7191 states and 12762 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:36:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:36:50,071 INFO L93 Difference]: Finished difference Result 10839 states and 18782 transitions. [2022-02-10 03:36:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-02-10 03:36:50,072 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:36:50,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:36:50,084 INFO L225 Difference]: With dead ends: 10839 [2022-02-10 03:36:50,084 INFO L226 Difference]: Without dead ends: 10817 [2022-02-10 03:36:50,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24953 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=8612, Invalid=53140, Unknown=0, NotChecked=0, Total=61752 [2022-02-10 03:36:50,090 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 542 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2738 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 2738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:36:50,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 553 Invalid, 3806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 2738 Invalid, 0 Unknown, 367 Unchecked, 1.5s Time] [2022-02-10 03:36:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10817 states. [2022-02-10 03:36:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10817 to 7719. [2022-02-10 03:36:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7719 states, 7718 states have (on average 1.7709251101321586) internal successors, (13668), 7718 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:36:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7719 states to 7719 states and 13668 transitions. [2022-02-10 03:36:50,239 INFO L78 Accepts]: Start accepts. Automaton has 7719 states and 13668 transitions. Word has length 43 [2022-02-10 03:36:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:36:50,239 INFO L470 AbstractCegarLoop]: Abstraction has 7719 states and 13668 transitions. [2022-02-10 03:36:50,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:36:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7719 states and 13668 transitions. [2022-02-10 03:36:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:36:50,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:36:50,246 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:36:50,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-10 03:36:50,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:36:50,447 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:36:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:36:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1290351525, now seen corresponding path program 30 times [2022-02-10 03:36:50,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:36:50,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950691531] [2022-02-10 03:36:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:36:50,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:36:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:36:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:36:50,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:36:50,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950691531] [2022-02-10 03:36:50,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950691531] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:36:50,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282709575] [2022-02-10 03:36:50,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:36:50,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:36:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:36:50,740 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:36:50,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 03:36:50,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:36:50,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:36:50,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:36:50,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:36:51,471 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:36:51,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:36:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:36:51,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:36:52,214 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:36:52,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:36:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:36:53,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282709575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:36:53,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:36:53,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 55 [2022-02-10 03:36:53,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175404400] [2022-02-10 03:36:53,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:36:53,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-10 03:36:53,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:36:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-10 03:36:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2626, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:36:53,693 INFO L87 Difference]: Start difference. First operand 7719 states and 13668 transitions. Second operand has 55 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) [2022-02-10 03:37:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:37:19,880 INFO L93 Difference]: Finished difference Result 19076 states and 32898 transitions. [2022-02-10 03:37:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 399 states. [2022-02-10 03:37:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 55 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) Word has length 43 [2022-02-10 03:37:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:37:19,904 INFO L225 Difference]: With dead ends: 19076 [2022-02-10 03:37:19,905 INFO L226 Difference]: Without dead ends: 18982 [2022-02-10 03:37:19,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 448 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90402 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=28573, Invalid=173477, Unknown=0, NotChecked=0, Total=202050 [2022-02-10 03:37:19,918 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 616 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 5195 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 5779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 5195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:37:19,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1156 Invalid, 5779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 5195 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-10 03:37:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18982 states. [2022-02-10 03:37:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18982 to 8450. [2022-02-10 03:37:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.7778435317789087) internal successors, (15021), 8449 states have internal predecessors, (15021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:37:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 15021 transitions. [2022-02-10 03:37:20,070 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 15021 transitions. Word has length 43 [2022-02-10 03:37:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:37:20,070 INFO L470 AbstractCegarLoop]: Abstraction has 8450 states and 15021 transitions. [2022-02-10 03:37:20,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 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) [2022-02-10 03:37:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 15021 transitions. [2022-02-10 03:37:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:37:20,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:37:20,077 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:37:20,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-10 03:37:20,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-10 03:37:20,277 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:37:20,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:37:20,278 INFO L85 PathProgramCache]: Analyzing trace with hash -738709847, now seen corresponding path program 31 times [2022-02-10 03:37:20,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:37:20,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791030260] [2022-02-10 03:37:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:37:20,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:37:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:37:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:37:20,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:37:20,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791030260] [2022-02-10 03:37:20,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791030260] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:37:20,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239365935] [2022-02-10 03:37:20,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:37:20,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:37:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:37:20,644 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:37:20,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 03:37:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:37:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:37:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:37:21,374 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:37:21,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:37:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:37:21,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:37:22,119 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:37:22,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:37:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:37:23,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239365935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:37:23,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:37:23,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 54 [2022-02-10 03:37:23,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340886557] [2022-02-10 03:37:23,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:37:23,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-10 03:37:23,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:37:23,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-10 03:37:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2507, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:37:23,641 INFO L87 Difference]: Start difference. First operand 8450 states and 15021 transitions. Second operand has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 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) [2022-02-10 03:37:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:37:54,691 INFO L93 Difference]: Finished difference Result 17420 states and 29910 transitions. [2022-02-10 03:37:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 449 states. [2022-02-10 03:37:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 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) Word has length 43 [2022-02-10 03:37:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:37:54,712 INFO L225 Difference]: With dead ends: 17420 [2022-02-10 03:37:54,712 INFO L226 Difference]: Without dead ends: 17353 [2022-02-10 03:37:54,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112943 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=34957, Invalid=213545, Unknown=0, NotChecked=0, Total=248502 [2022-02-10 03:37:54,724 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 656 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 5699 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 6514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 5699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:37:54,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1284 Invalid, 6514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 5699 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-10 03:37:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17353 states. [2022-02-10 03:37:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17353 to 8945. [2022-02-10 03:37:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8945 states, 8944 states have (on average 1.7823121645796065) internal successors, (15941), 8944 states have internal predecessors, (15941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:37:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 15941 transitions. [2022-02-10 03:37:54,858 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 15941 transitions. Word has length 43 [2022-02-10 03:37:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:37:54,858 INFO L470 AbstractCegarLoop]: Abstraction has 8945 states and 15941 transitions. [2022-02-10 03:37:54,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 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) [2022-02-10 03:37:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 15941 transitions. [2022-02-10 03:37:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:37:54,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:37:54,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:37:54,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-10 03:37:55,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:37:55,066 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:37:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:37:55,066 INFO L85 PathProgramCache]: Analyzing trace with hash -695267291, now seen corresponding path program 32 times [2022-02-10 03:37:55,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:37:55,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499083707] [2022-02-10 03:37:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:37:55,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:37:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:37:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:37:55,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:37:55,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499083707] [2022-02-10 03:37:55,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499083707] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:37:55,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104516633] [2022-02-10 03:37:55,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:37:55,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:37:55,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:37:55,391 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:37:55,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 03:37:55,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:37:55,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:37:55,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-10 03:37:55,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:37:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:37:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:37:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:37:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:37:56,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:37:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:37:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:37:56,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 22 [2022-02-10 03:37:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:37:56,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:37:56,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:56,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:37:57,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:37:57,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 127 [2022-02-10 03:37:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:37:57,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104516633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:37:57,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:37:57,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:37:57,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397796591] [2022-02-10 03:37:57,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:37:57,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:37:57,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:37:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:37:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=2782, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:37:57,801 INFO L87 Difference]: Start difference. First operand 8945 states and 15941 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:38:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:38:04,289 INFO L93 Difference]: Finished difference Result 12302 states and 21404 transitions. [2022-02-10 03:38:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-10 03:38:04,290 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:38:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:38:04,303 INFO L225 Difference]: With dead ends: 12302 [2022-02-10 03:38:04,303 INFO L226 Difference]: Without dead ends: 12273 [2022-02-10 03:38:04,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13666 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5559, Invalid=29973, Unknown=0, NotChecked=0, Total=35532 [2022-02-10 03:38:04,308 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 608 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2184 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:38:04,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 524 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 978 Invalid, 0 Unknown, 2184 Unchecked, 0.5s Time] [2022-02-10 03:38:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12273 states. [2022-02-10 03:38:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12273 to 8953. [2022-02-10 03:38:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8953 states, 8952 states have (on average 1.7818364611260054) internal successors, (15951), 8952 states have internal predecessors, (15951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:38:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8953 states to 8953 states and 15951 transitions. [2022-02-10 03:38:04,474 INFO L78 Accepts]: Start accepts. Automaton has 8953 states and 15951 transitions. Word has length 43 [2022-02-10 03:38:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:38:04,474 INFO L470 AbstractCegarLoop]: Abstraction has 8953 states and 15951 transitions. [2022-02-10 03:38:04,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:38:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 8953 states and 15951 transitions. [2022-02-10 03:38:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:38:04,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:38:04,480 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:38:04,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-10 03:38:04,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:38:04,681 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:38:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:38:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1864432877, now seen corresponding path program 33 times [2022-02-10 03:38:04,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:38:04,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881393653] [2022-02-10 03:38:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:38:04,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:38:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:38:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:38:05,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:38:05,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881393653] [2022-02-10 03:38:05,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881393653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:38:05,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398220257] [2022-02-10 03:38:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:38:05,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:38:05,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:38:05,018 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:38:05,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 03:38:05,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:38:05,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:38:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:38:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:38:05,767 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:38:05,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:38:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:38:05,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:38:06,536 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:38:06,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:38:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:38:08,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398220257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:38:08,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:38:08,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:38:08,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442635544] [2022-02-10 03:38:08,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:38:08,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:38:08,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:38:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:38:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2911, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:38:08,185 INFO L87 Difference]: Start difference. First operand 8953 states and 15951 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:38:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:38:36,583 INFO L93 Difference]: Finished difference Result 19694 states and 33715 transitions. [2022-02-10 03:38:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2022-02-10 03:38:36,585 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:38:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:38:36,607 INFO L225 Difference]: With dead ends: 19694 [2022-02-10 03:38:36,607 INFO L226 Difference]: Without dead ends: 19380 [2022-02-10 03:38:36,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 464 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94679 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=30429, Invalid=186261, Unknown=0, NotChecked=0, Total=216690 [2022-02-10 03:38:36,618 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 653 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 4716 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 5342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 4716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:38:36,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 883 Invalid, 5342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 4716 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-10 03:38:36,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19380 states. [2022-02-10 03:38:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19380 to 9574. [2022-02-10 03:38:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9574 states, 9573 states have (on average 1.7804241094745639) internal successors, (17044), 9573 states have internal predecessors, (17044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:38:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9574 states to 9574 states and 17044 transitions. [2022-02-10 03:38:36,761 INFO L78 Accepts]: Start accepts. Automaton has 9574 states and 17044 transitions. Word has length 43 [2022-02-10 03:38:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:38:36,761 INFO L470 AbstractCegarLoop]: Abstraction has 9574 states and 17044 transitions. [2022-02-10 03:38:36,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:38:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 9574 states and 17044 transitions. [2022-02-10 03:38:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:38:36,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:38:36,769 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:38:36,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-10 03:38:36,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-10 03:38:36,969 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:38:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:38:36,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2042919643, now seen corresponding path program 34 times [2022-02-10 03:38:36,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:38:36,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242478433] [2022-02-10 03:38:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:38:36,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:38:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:38:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:38:37,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:38:37,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242478433] [2022-02-10 03:38:37,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242478433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:38:37,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691360641] [2022-02-10 03:38:37,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:38:37,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:38:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:38:37,299 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:38:37,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 03:38:37,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:38:37,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:38:37,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:38:37,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:38:38,069 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:38:38,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:38:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:38:38,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:38:38,859 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-10 03:38:38,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-10 03:38:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:38:40,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691360641] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:38:40,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:38:40,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:38:40,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460553426] [2022-02-10 03:38:40,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:38:40,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:38:40,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:38:40,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:38:40,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2918, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:38:40,419 INFO L87 Difference]: Start difference. First operand 9574 states and 17044 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:01,284 INFO L93 Difference]: Finished difference Result 15966 states and 27607 transitions. [2022-02-10 03:39:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2022-02-10 03:39:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2022-02-10 03:39:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:01,303 INFO L225 Difference]: With dead ends: 15966 [2022-02-10 03:39:01,304 INFO L226 Difference]: Without dead ends: 15908 [2022-02-10 03:39:01,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51473 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=17999, Invalid=109807, Unknown=0, NotChecked=0, Total=127806 [2022-02-10 03:39:01,311 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 547 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 3710 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 4220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 3710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:01,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 673 Invalid, 4220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 3710 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-10 03:39:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15908 states. [2022-02-10 03:39:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15908 to 9654. [2022-02-10 03:39:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9654 states, 9653 states have (on average 1.7784108567284782) internal successors, (17167), 9653 states have internal predecessors, (17167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9654 states to 9654 states and 17167 transitions. [2022-02-10 03:39:01,452 INFO L78 Accepts]: Start accepts. Automaton has 9654 states and 17167 transitions. Word has length 43 [2022-02-10 03:39:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:01,453 INFO L470 AbstractCegarLoop]: Abstraction has 9654 states and 17167 transitions. [2022-02-10 03:39:01,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9654 states and 17167 transitions. [2022-02-10 03:39:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:39:01,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:01,460 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:01,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:01,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-10 03:39:01,661 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:39:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1960767709, now seen corresponding path program 35 times [2022-02-10 03:39:01,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:01,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16209411] [2022-02-10 03:39:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:01,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:02,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:02,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16209411] [2022-02-10 03:39:02,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16209411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:02,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267959611] [2022-02-10 03:39:02,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:02,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:02,042 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:39:02,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 03:39:02,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:39:02,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:39:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:02,844 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-10 03:39:02,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-10 03:39:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:02,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:03,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:03,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 135 [2022-02-10 03:39:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:04,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267959611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:04,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:04,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-10 03:39:04,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006058686] [2022-02-10 03:39:04,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:04,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-10 03:39:04,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:04,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-10 03:39:04,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2931, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:39:04,186 INFO L87 Difference]: Start difference. First operand 9654 states and 17167 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 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... [2022-02-10 03:39:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:39:05,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=857, Invalid=5785, Unknown=0, NotChecked=0, Total=6642 [2022-02-10 03:39:05,240 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:05,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 27 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:39:05,241 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-10 03:39:05,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-10 03:39:05,272 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:39:05,272 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:39:05,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-10 03:39:05,441 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (9654states) and FLOYD_HOARE automaton (currently 28 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 82 known predicates. [2022-02-10 03:39:05,443 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-10 03:39:05,443 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-10 03:39:05,443 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-10 03:39:05,444 INFO L732 BasicCegarLoop]: Path program histogram: [35, 2, 1] [2022-02-10 03:39:05,445 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 03:39:05,445 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 03:39:05,447 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 03:39:05 BasicIcfg [2022-02-10 03:39:05,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 03:39:05,447 INFO L158 Benchmark]: Toolchain (without parser) took 729906.12ms. Allocated memory was 200.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 165.6MB in the beginning and 696.3MB in the end (delta: -530.7MB). Peak memory consumption was 518.2MB. Max. memory is 8.0GB. [2022-02-10 03:39:05,447 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 200.3MB. Free memory is still 166.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:39:05,448 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.90ms. Allocated memory is still 200.3MB. Free memory was 165.5MB in the beginning and 163.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:39:05,448 INFO L158 Benchmark]: Boogie Preprocessor took 14.10ms. Allocated memory is still 200.3MB. Free memory was 163.9MB in the beginning and 162.9MB in the end (delta: 993.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:39:05,448 INFO L158 Benchmark]: RCFGBuilder took 199.06ms. Allocated memory is still 200.3MB. Free memory was 162.9MB in the beginning and 153.6MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-10 03:39:05,448 INFO L158 Benchmark]: TraceAbstraction took 729663.07ms. Allocated memory was 200.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 153.1MB in the beginning and 696.3MB in the end (delta: -543.2MB). Peak memory consumption was 505.6MB. Max. memory is 8.0GB. [2022-02-10 03:39:05,448 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 0.13ms. Allocated memory is still 200.3MB. Free memory is still 166.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.90ms. Allocated memory is still 200.3MB. Free memory was 165.5MB in the beginning and 163.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.10ms. Allocated memory is still 200.3MB. Free memory was 163.9MB in the beginning and 162.9MB in the end (delta: 993.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 199.06ms. Allocated memory is still 200.3MB. Free memory was 162.9MB in the beginning and 153.6MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 729663.07ms. Allocated memory was 200.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 153.1MB in the beginning and 696.3MB in the end (delta: -543.2MB). Peak memory consumption was 505.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (9654states) and FLOYD_HOARE automaton (currently 28 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 82 known predicates. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9654states) and FLOYD_HOARE automaton (currently 28 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 82 known predicates. - TimeoutResultAtElement [Line: 57]: 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 (9654states) and FLOYD_HOARE automaton (currently 28 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 82 known predicates. - TimeoutResultAtElement [Line: 57]: 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 (9654states) and FLOYD_HOARE automaton (currently 28 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 82 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 729.6s, OverallIterations: 38, TraceHistogramMax: 4, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.7s, AutomataDifference: 632.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, PartialOrderReductionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19263 SdHoareTripleChecker+Valid, 59.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19263 mSDsluCounter, 26872 SdHoareTripleChecker+Invalid, 50.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11043 IncrementalHoareTripleChecker+Unchecked, 36041 mSDsCounter, 18695 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 113722 IncrementalHoareTripleChecker+Invalid, 143460 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18695 mSolverCounterUnsat, 1343 mSDtfsCounter, 113722 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13266 GetRequests, 1906 SyntacticMatches, 57 SemanticMatches, 11302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199178 ImplicationChecksByTransitivity, 589.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49040occurred in iteration=0, InterpolantAutomatonStates: 9901, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 37 MinimizatonAttempts, 123472 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 83.0s InterpolantComputationTime, 2812 NumberOfCodeBlocks, 2812 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 4080 ConstructedInterpolants, 125 QuantifiedInterpolants, 62742 SizeOfPredicates, 439 NumberOfNonLiveVariables, 3366 ConjunctsInSsa, 984 ConjunctsInUnsatCore, 108 InterpolantComputations, 3 PerfectInterpolantSequences, 282/3466 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