/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:32:29,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:32:29,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:32:29,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:32:29,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:32:29,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:32:29,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:32:29,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:32:29,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:32:29,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:32:29,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:32:29,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:32:29,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:32:29,549 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:32:29,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:32:29,550 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:32:29,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:32:29,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:32:29,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:32:29,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:32:29,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:32:29,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:32:29,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:32:29,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:32:29,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:32:29,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:32:29,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:32:29,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:32:29,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:32:29,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:32:29,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:32:29,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:32:29,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:32:29,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:32:29,797 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:32:29,798 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:32:29,799 INFO L432 ainManager$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 [2022-03-03 19:32:29,800 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2022-03-03 19:32:29,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:32:29,822 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:32:29,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:32:29,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:32:29,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:32:29,834 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 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,845 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 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,852 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:32:29,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:32:29,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:32:29,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:32:29,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:32:29,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:32:29,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:32:29,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:32:29,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:32:29,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/1) ... [2022-03-03 19:32:29,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:32:29,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:29,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:32:29,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:32:29,934 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:32:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:32:29,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:32:29,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:32:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:32:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:32:29,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:32:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:32:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:32:29,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:32:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:32:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:32:29,936 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:32:29,971 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:32:29,973 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:32:30,044 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:32:30,057 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:32:30,057 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:32:30,059 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:32:30 BoogieIcfgContainer [2022-03-03 19:32:30,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:32:30,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:32:30,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:32:30,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:32:30,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:32:29" (1/2) ... [2022-03-03 19:32:30,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba0fa5c and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:32:30, skipping insertion in model container [2022-03-03 19:32:30,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:32:30" (2/2) ... [2022-03-03 19:32:30,083 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2022-03-03 19:32:30,087 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:32:30,087 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:32:30,088 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:32:30,088 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:32:30,143 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:32:30,181 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:32:30,190 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:32:30,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:32:30,209 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2022-03-03 19:32:30,247 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) [2022-03-03 19:32:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 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) [2022-03-03 19:32:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:32:30,259 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:30,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:30,260 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 785752709, now seen corresponding path program 1 times [2022-03-03 19:32:30,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:30,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640926938] [2022-03-03 19:32:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:30,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:30,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640926938] [2022-03-03 19:32:30,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640926938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:32:30,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:32:30,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:32:30,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447861546] [2022-03-03 19:32:30,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:32:30,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:32:30,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:32:30,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:32:30,421 INFO L87 Difference]: Start difference. First operand 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) 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) [2022-03-03 19:32:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:30,485 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2022-03-03 19:32:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:32:30,487 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 [2022-03-03 19:32:30,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:30,494 INFO L225 Difference]: With dead ends: 172 [2022-03-03 19:32:30,494 INFO L226 Difference]: Without dead ends: 109 [2022-03-03 19:32:30,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:32:30,498 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:30,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:32:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-03 19:32:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-03 19:32:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2022-03-03 19:32:30,578 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2022-03-03 19:32:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:30,579 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2022-03-03 19:32:30,580 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) [2022-03-03 19:32:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2022-03-03 19:32:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:32:30,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:30,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:30,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:32:30,582 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1380410419, now seen corresponding path program 2 times [2022-03-03 19:32:30,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:30,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843274109] [2022-03-03 19:32:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:30,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:30,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:30,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843274109] [2022-03-03 19:32:30,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843274109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:32:30,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:32:30,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:32:30,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221018981] [2022-03-03 19:32:30,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:32:30,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:32:30,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:32:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:32:30,643 INFO L87 Difference]: Start difference. First operand 109 states and 249 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) [2022-03-03 19:32:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:30,732 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2022-03-03 19:32:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:32:30,733 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 [2022-03-03 19:32:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:30,739 INFO L225 Difference]: With dead ends: 190 [2022-03-03 19:32:30,740 INFO L226 Difference]: Without dead ends: 142 [2022-03-03 19:32:30,741 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 [2022-03-03 19:32:30,742 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:30,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:32:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-03 19:32:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-03 19:32:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2022-03-03 19:32:30,768 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2022-03-03 19:32:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:30,768 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2022-03-03 19:32:30,768 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) [2022-03-03 19:32:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2022-03-03 19:32:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:32:30,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:30,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:30,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:32:30,770 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1081760350, now seen corresponding path program 1 times [2022-03-03 19:32:30,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:30,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81759469] [2022-03-03 19:32:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:30,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:30,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81759469] [2022-03-03 19:32:30,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81759469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:32:30,827 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:32:30,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:32:30,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57081871] [2022-03-03 19:32:30,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:32:30,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:32:30,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:32:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:32:30,829 INFO L87 Difference]: Start difference. First operand 142 states and 330 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) [2022-03-03 19:32:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:30,846 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2022-03-03 19:32:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:32:30,846 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 [2022-03-03 19:32:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:30,848 INFO L225 Difference]: With dead ends: 164 [2022-03-03 19:32:30,848 INFO L226 Difference]: Without dead ends: 152 [2022-03-03 19:32:30,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:32:30,849 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:30,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:32:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-03 19:32:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-03 19:32:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2022-03-03 19:32:30,864 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2022-03-03 19:32:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:30,864 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2022-03-03 19:32:30,864 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) [2022-03-03 19:32:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2022-03-03 19:32:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:32:30,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:30,866 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] [2022-03-03 19:32:30,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:32:30,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash -220317154, now seen corresponding path program 1 times [2022-03-03 19:32:30,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:30,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367085858] [2022-03-03 19:32:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:31,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:31,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367085858] [2022-03-03 19:32:31,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367085858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:31,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863194760] [2022-03-03 19:32:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:31,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:31,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:31,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:31,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:32:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:31,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:32:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:31,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:32:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:31,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:31,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:32:31,616 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 [2022-03-03 19:32:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:31,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863194760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:31,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:31,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:32:31,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006951457] [2022-03-03 19:32:31,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:31,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:32:31,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:32:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:32:31,760 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:32,223 INFO L93 Difference]: Finished difference Result 358 states and 819 transitions. [2022-03-03 19:32:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:32:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:32:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:32,226 INFO L225 Difference]: With dead ends: 358 [2022-03-03 19:32:32,226 INFO L226 Difference]: Without dead ends: 268 [2022-03-03 19:32:32,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:32:32,228 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 251 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:32,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 115 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:32:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-03 19:32:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 185. [2022-03-03 19:32:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2022-03-03 19:32:32,241 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2022-03-03 19:32:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:32,241 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2022-03-03 19:32:32,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2022-03-03 19:32:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:32:32,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:32,243 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] [2022-03-03 19:32:32,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:32,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:32,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1335000105, now seen corresponding path program 2 times [2022-03-03 19:32:32,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:32,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759154714] [2022-03-03 19:32:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:32,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:32,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:32,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759154714] [2022-03-03 19:32:32,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759154714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:32,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044457076] [2022-03-03 19:32:32,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:32:32,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:32,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:32,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:32:32,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:32:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:32:32,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:32,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:32,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044457076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:32,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:32,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:32:32,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057814495] [2022-03-03 19:32:32,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:32,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:32:32,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:32:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:32:32,649 INFO L87 Difference]: Start difference. First operand 185 states and 431 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) [2022-03-03 19:32:32,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:32,672 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2022-03-03 19:32:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:32:32,672 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 [2022-03-03 19:32:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:32,675 INFO L225 Difference]: With dead ends: 496 [2022-03-03 19:32:32,675 INFO L226 Difference]: Without dead ends: 454 [2022-03-03 19:32:32,675 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 [2022-03-03 19:32:32,676 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:32,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 65 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:32:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-03-03 19:32:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2022-03-03 19:32:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2022-03-03 19:32:32,692 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2022-03-03 19:32:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:32,692 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2022-03-03 19:32:32,692 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) [2022-03-03 19:32:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2022-03-03 19:32:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:32:32,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:32,694 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] [2022-03-03 19:32:32,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:32,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:32,904 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash -528291211, now seen corresponding path program 3 times [2022-03-03 19:32:32,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:32,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847533122] [2022-03-03 19:32:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:33,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:33,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847533122] [2022-03-03 19:32:33,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847533122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:33,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312373368] [2022-03-03 19:32:33,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:32:33,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:33,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:33,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:33,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:32:33,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:32:33,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:32:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:33,504 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:32:33,505 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 [2022-03-03 19:32:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:33,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:33,844 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:32:33,845 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 [2022-03-03 19:32:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:34,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312373368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:34,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:34,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-03 19:32:34,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568060956] [2022-03-03 19:32:34,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:34,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:32:34,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:32:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:32:34,110 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:40,755 INFO L93 Difference]: Finished difference Result 2570 states and 6225 transitions. [2022-03-03 19:32:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-03 19:32:40,756 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:32:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:40,764 INFO L225 Difference]: With dead ends: 2570 [2022-03-03 19:32:40,764 INFO L226 Difference]: Without dead ends: 1697 [2022-03-03 19:32:40,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11757 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5243, Invalid=26977, Unknown=0, NotChecked=0, Total=32220 [2022-03-03 19:32:40,772 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1193 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:40,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 512 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:32:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-03-03 19:32:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 421. [2022-03-03 19:32:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.4642857142857144) internal successors, (1035), 420 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1035 transitions. [2022-03-03 19:32:40,800 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1035 transitions. Word has length 31 [2022-03-03 19:32:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:40,801 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1035 transitions. [2022-03-03 19:32:40,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1035 transitions. [2022-03-03 19:32:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:32:40,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:40,807 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] [2022-03-03 19:32:40,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:41,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:41,030 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1420855431, now seen corresponding path program 4 times [2022-03-03 19:32:41,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:41,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910741273] [2022-03-03 19:32:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:41,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:41,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910741273] [2022-03-03 19:32:41,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910741273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:41,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213357592] [2022-03-03 19:32:41,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:32:41,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:41,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:41,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:32:41,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:32:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:41,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:32:41,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:41,565 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:32:41,565 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 [2022-03-03 19:32:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:41,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:41,826 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:32:41,827 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 [2022-03-03 19:32:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:42,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213357592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:42,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:42,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-03 19:32:42,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289284320] [2022-03-03 19:32:42,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:42,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:32:42,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:42,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:32:42,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:32:42,064 INFO L87 Difference]: Start difference. First operand 421 states and 1035 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:46,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:46,143 INFO L93 Difference]: Finished difference Result 2028 states and 4820 transitions. [2022-03-03 19:32:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-03 19:32:46,143 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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 [2022-03-03 19:32:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:46,151 INFO L225 Difference]: With dead ends: 2028 [2022-03-03 19:32:46,152 INFO L226 Difference]: Without dead ends: 1858 [2022-03-03 19:32:46,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3143, Invalid=14413, Unknown=0, NotChecked=0, Total=17556 [2022-03-03 19:32:46,156 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 550 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:46,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 293 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:32:46,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-03-03 19:32:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 477. [2022-03-03 19:32:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.4978991596638656) internal successors, (1189), 476 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1189 transitions. [2022-03-03 19:32:46,180 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1189 transitions. Word has length 31 [2022-03-03 19:32:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:46,180 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1189 transitions. [2022-03-03 19:32:46,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1189 transitions. [2022-03-03 19:32:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:32:46,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:46,182 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] [2022-03-03 19:32:46,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:46,403 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash 256367733, now seen corresponding path program 5 times [2022-03-03 19:32:46,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:46,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602514982] [2022-03-03 19:32:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:46,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:46,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:46,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602514982] [2022-03-03 19:32:46,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602514982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:46,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870982969] [2022-03-03 19:32:46,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:32:46,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:46,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:46,600 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:46,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:32:46,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:32:46,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:46,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:32:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:47,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:32:47,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:32:47,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:32:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:47,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:47,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:32:47,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:32:47,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:32:47,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 51 [2022-03-03 19:32:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:47,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870982969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:47,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:47,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-03 19:32:47,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603626010] [2022-03-03 19:32:47,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:47,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:32:47,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:32:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:32:47,554 INFO L87 Difference]: Start difference. First operand 477 states and 1189 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:58,519 INFO L93 Difference]: Finished difference Result 6877 states and 16443 transitions. [2022-03-03 19:32:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-03 19:32:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:32:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:58,542 INFO L225 Difference]: With dead ends: 6877 [2022-03-03 19:32:58,543 INFO L226 Difference]: Without dead ends: 5277 [2022-03-03 19:32:58,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38288 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13473, Invalid=70917, Unknown=0, NotChecked=0, Total=84390 [2022-03-03 19:32:58,551 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1278 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 2737 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:58,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 1016 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2737 Invalid, 0 Unknown, 323 Unchecked, 1.6s Time] [2022-03-03 19:32:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2022-03-03 19:32:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 959. [2022-03-03 19:32:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.6085594989561587) internal successors, (2499), 958 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2499 transitions. [2022-03-03 19:32:58,609 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2499 transitions. Word has length 31 [2022-03-03 19:32:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:58,610 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2499 transitions. [2022-03-03 19:32:58,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2499 transitions. [2022-03-03 19:32:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:32:58,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:58,612 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] [2022-03-03 19:32:58,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:58,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:58,831 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash 693727769, now seen corresponding path program 6 times [2022-03-03 19:32:58,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:58,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192731970] [2022-03-03 19:32:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:58,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:32:58,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:58,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192731970] [2022-03-03 19:32:58,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192731970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:58,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952281850] [2022-03-03 19:32:58,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:32:58,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:58,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:59,000 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:59,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:32:59,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:32:59,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:32:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:59,315 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:32:59,315 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 [2022-03-03 19:32:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:59,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:59,557 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:32:59,557 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 [2022-03-03 19:32:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:59,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952281850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:59,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:59,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-03-03 19:32:59,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515331760] [2022-03-03 19:32:59,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:59,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:32:59,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:32:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:32:59,766 INFO L87 Difference]: Start difference. First operand 959 states and 2499 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) [2022-03-03 19:33:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:05,824 INFO L93 Difference]: Finished difference Result 5655 states and 14099 transitions. [2022-03-03 19:33:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-03 19:33:05,824 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 [2022-03-03 19:33:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:05,868 INFO L225 Difference]: With dead ends: 5655 [2022-03-03 19:33:05,869 INFO L226 Difference]: Without dead ends: 5002 [2022-03-03 19:33:05,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16724 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6779, Invalid=32623, Unknown=0, NotChecked=0, Total=39402 [2022-03-03 19:33:05,872 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 921 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:05,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 845 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:33:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2022-03-03 19:33:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 1343. [2022-03-03 19:33:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.615499254843517) internal successors, (3510), 1342 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3510 transitions. [2022-03-03 19:33:05,928 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3510 transitions. Word has length 31 [2022-03-03 19:33:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:05,929 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 3510 transitions. [2022-03-03 19:33:05,929 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) [2022-03-03 19:33:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3510 transitions. [2022-03-03 19:33:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:33:05,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:05,933 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] [2022-03-03 19:33:05,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:06,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:06,158 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2111481487, now seen corresponding path program 7 times [2022-03-03 19:33:06,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:06,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982288931] [2022-03-03 19:33:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:06,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:06,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:06,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982288931] [2022-03-03 19:33:06,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982288931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:06,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076459689] [2022-03-03 19:33:06,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:33:06,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:06,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:06,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:33:06,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:33:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:33:06,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:06,680 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:33:06,680 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 [2022-03-03 19:33:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:06,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:06,924 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:33:06,924 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 [2022-03-03 19:33:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:07,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076459689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:07,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:07,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-03 19:33:07,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051483714] [2022-03-03 19:33:07,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:07,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:33:07,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:07,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:33:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:33:07,103 INFO L87 Difference]: Start difference. First operand 1343 states and 3510 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:12,890 INFO L93 Difference]: Finished difference Result 3910 states and 9739 transitions. [2022-03-03 19:33:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-03 19:33:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:33:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:12,904 INFO L225 Difference]: With dead ends: 3910 [2022-03-03 19:33:12,905 INFO L226 Difference]: Without dead ends: 2974 [2022-03-03 19:33:12,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10853 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5059, Invalid=25043, Unknown=0, NotChecked=0, Total=30102 [2022-03-03 19:33:12,907 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 754 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:12,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 647 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:33:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-03-03 19:33:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 1401. [2022-03-03 19:33:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.6135714285714284) internal successors, (3659), 1400 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3659 transitions. [2022-03-03 19:33:12,945 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3659 transitions. Word has length 31 [2022-03-03 19:33:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:12,946 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 3659 transitions. [2022-03-03 19:33:12,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3659 transitions. [2022-03-03 19:33:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:33:12,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:12,949 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] [2022-03-03 19:33:12,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:13,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:13,168 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash -911119041, now seen corresponding path program 8 times [2022-03-03 19:33:13,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:13,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771017465] [2022-03-03 19:33:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:13,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:33:13,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:13,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771017465] [2022-03-03 19:33:13,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771017465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:13,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492617853] [2022-03-03 19:33:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:33:13,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:13,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:33:13,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:33:13,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:33:13,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:13,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:33:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:13,616 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:33:13,616 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 [2022-03-03 19:33:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:13,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:13,826 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:33:13,826 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 [2022-03-03 19:33:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:14,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492617853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:14,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:14,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-03-03 19:33:14,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489999930] [2022-03-03 19:33:14,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:14,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:33:14,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:14,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:33:14,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:33:14,017 INFO L87 Difference]: Start difference. First operand 1401 states and 3659 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) [2022-03-03 19:33:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:17,703 INFO L93 Difference]: Finished difference Result 3992 states and 9944 transitions. [2022-03-03 19:33:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 19:33:17,704 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 [2022-03-03 19:33:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:17,712 INFO L225 Difference]: With dead ends: 3992 [2022-03-03 19:33:17,712 INFO L226 Difference]: Without dead ends: 3412 [2022-03-03 19:33:17,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6022 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3275, Invalid=13495, Unknown=0, NotChecked=0, Total=16770 [2022-03-03 19:33:17,714 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 761 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:17,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 453 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:33:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-03-03 19:33:17,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 1525. [2022-03-03 19:33:17,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.6122047244094486) internal successors, (3981), 1524 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 3981 transitions. [2022-03-03 19:33:17,753 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 3981 transitions. Word has length 31 [2022-03-03 19:33:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:17,754 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 3981 transitions. [2022-03-03 19:33:17,754 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) [2022-03-03 19:33:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 3981 transitions. [2022-03-03 19:33:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:33:17,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:17,757 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] [2022-03-03 19:33:17,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:17,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-03 19:33:17,971 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2139987936, now seen corresponding path program 9 times [2022-03-03 19:33:17,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:17,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108085365] [2022-03-03 19:33:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:17,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:18,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:18,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108085365] [2022-03-03 19:33:18,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108085365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:18,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283083785] [2022-03-03 19:33:18,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:33:18,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:18,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:33:18,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:33:18,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:33:18,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:33:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:18,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:18,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283083785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:18,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:18,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-03 19:33:18,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758943318] [2022-03-03 19:33:18,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:18,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:33:18,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:33:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:33:18,159 INFO L87 Difference]: Start difference. First operand 1525 states and 3981 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) [2022-03-03 19:33:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:18,187 INFO L93 Difference]: Finished difference Result 2453 states and 6384 transitions. [2022-03-03 19:33:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:33:18,187 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 [2022-03-03 19:33:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:18,193 INFO L225 Difference]: With dead ends: 2453 [2022-03-03 19:33:18,193 INFO L226 Difference]: Without dead ends: 2396 [2022-03-03 19:33:18,193 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 [2022-03-03 19:33:18,194 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 79 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:18,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:33:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-03-03 19:33:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2033. [2022-03-03 19:33:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.6663385826771653) internal successors, (5418), 2032 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 5418 transitions. [2022-03-03 19:33:18,236 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 5418 transitions. Word has length 34 [2022-03-03 19:33:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:18,236 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 5418 transitions. [2022-03-03 19:33:18,236 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) [2022-03-03 19:33:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 5418 transitions. [2022-03-03 19:33:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:33:18,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:18,241 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] [2022-03-03 19:33:18,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:18,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:18,463 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash -293873602, now seen corresponding path program 10 times [2022-03-03 19:33:18,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:18,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110511383] [2022-03-03 19:33:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:18,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:18,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:18,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110511383] [2022-03-03 19:33:18,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110511383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:18,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713820354] [2022-03-03 19:33:18,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:33:18,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:18,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:18,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:33:18,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:33:18,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:33:18,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:33:18,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:19,203 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:33:19,203 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 [2022-03-03 19:33:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:19,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:19,652 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:33:19,653 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 [2022-03-03 19:33:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:20,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713820354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:20,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:20,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:33:20,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981662959] [2022-03-03 19:33:20,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:20,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:33:20,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:33:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:33:20,293 INFO L87 Difference]: Start difference. First operand 2033 states and 5418 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:32,816 INFO L93 Difference]: Finished difference Result 7888 states and 19557 transitions. [2022-03-03 19:33:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-03 19:33:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:33:32,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:32,834 INFO L225 Difference]: With dead ends: 7888 [2022-03-03 19:33:32,835 INFO L226 Difference]: Without dead ends: 6844 [2022-03-03 19:33:32,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36898 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13021, Invalid=78485, Unknown=0, NotChecked=0, Total=91506 [2022-03-03 19:33:32,865 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1619 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 5373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:32,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 1449 Invalid, 5373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-03 19:33:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2022-03-03 19:33:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 2385. [2022-03-03 19:33:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 2.670302013422819) internal successors, (6366), 2384 states have internal predecessors, (6366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 6366 transitions. [2022-03-03 19:33:32,941 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 6366 transitions. Word has length 37 [2022-03-03 19:33:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:32,941 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 6366 transitions. [2022-03-03 19:33:32,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 6366 transitions. [2022-03-03 19:33:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:33:32,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:32,947 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] [2022-03-03 19:33:32,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:33,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 19:33:33,170 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:33,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash 609080936, now seen corresponding path program 11 times [2022-03-03 19:33:33,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:33,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375470263] [2022-03-03 19:33:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:33,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:33,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375470263] [2022-03-03 19:33:33,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375470263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:33,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974413741] [2022-03-03 19:33:33,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:33:33,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:33,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:33,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:33:33,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:33:33,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:33:33,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:33:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:33,913 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:33:33,913 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 [2022-03-03 19:33:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:33,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:34,389 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:33:34,389 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 [2022-03-03 19:33:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:34,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974413741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:34,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:34,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:33:34,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367521810] [2022-03-03 19:33:34,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:34,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:33:34,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:34,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:33:34,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:33:34,891 INFO L87 Difference]: Start difference. First operand 2385 states and 6366 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:53,367 INFO L93 Difference]: Finished difference Result 11643 states and 28850 transitions. [2022-03-03 19:33:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 336 states. [2022-03-03 19:33:53,368 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:33:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:53,388 INFO L225 Difference]: With dead ends: 11643 [2022-03-03 19:33:53,389 INFO L226 Difference]: Without dead ends: 10173 [2022-03-03 19:33:53,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59584 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=19211, Invalid=123295, Unknown=0, NotChecked=0, Total=142506 [2022-03-03 19:33:53,395 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1401 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 5917 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 6653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 5917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:53,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 1490 Invalid, 6653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 5917 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-03 19:33:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2022-03-03 19:33:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 2603. [2022-03-03 19:33:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.68293620292083) internal successors, (6981), 2602 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 6981 transitions. [2022-03-03 19:33:53,500 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 6981 transitions. Word has length 37 [2022-03-03 19:33:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:53,501 INFO L470 AbstractCegarLoop]: Abstraction has 2603 states and 6981 transitions. [2022-03-03 19:33:53,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 6981 transitions. [2022-03-03 19:33:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:33:53,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:53,506 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] [2022-03-03 19:33:53,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:53,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:33:53,735 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:53,735 INFO L85 PathProgramCache]: Analyzing trace with hash 725042942, now seen corresponding path program 12 times [2022-03-03 19:33:53,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:53,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932844004] [2022-03-03 19:33:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:53,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:53,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:53,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932844004] [2022-03-03 19:33:53,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932844004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:53,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664468719] [2022-03-03 19:33:53,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:33:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:53,988 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:33:53,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:33:54,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:33:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:33:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:54,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:33:54,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:33:54,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:33:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:33:54,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:33:54,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:33:54,991 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 30 treesize of output 18 [2022-03-03 19:33:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:55,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:55,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:33:55,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:33:55,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:33:55,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:33:55,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:33:55,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:33:55,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:33:55,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 32 treesize of output 92 [2022-03-03 19:33:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:56,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664468719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:56,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:56,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:33:56,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799735947] [2022-03-03 19:33:56,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:56,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:33:56,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:33:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:33:56,436 INFO L87 Difference]: Start difference. First operand 2603 states and 6981 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:59,432 INFO L93 Difference]: Finished difference Result 4636 states and 12333 transitions. [2022-03-03 19:33:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 19:33:59,433 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:33:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:59,439 INFO L225 Difference]: With dead ends: 4636 [2022-03-03 19:33:59,439 INFO L226 Difference]: Without dead ends: 4587 [2022-03-03 19:33:59,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4449 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2197, Invalid=11845, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:33:59,441 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 288 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1733 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:59,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 501 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 725 Invalid, 0 Unknown, 1733 Unchecked, 0.3s Time] [2022-03-03 19:33:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2022-03-03 19:33:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 2757. [2022-03-03 19:33:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.6756168359941945) internal successors, (7374), 2756 states have internal predecessors, (7374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 7374 transitions. [2022-03-03 19:33:59,505 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 7374 transitions. Word has length 37 [2022-03-03 19:33:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:59,505 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 7374 transitions. [2022-03-03 19:33:59,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 7374 transitions. [2022-03-03 19:33:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:33:59,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:59,511 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] [2022-03-03 19:33:59,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:59,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 19:33:59,728 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1062011650, now seen corresponding path program 13 times [2022-03-03 19:33:59,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:59,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777497787] [2022-03-03 19:33:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:59,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:00,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:00,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777497787] [2022-03-03 19:34:00,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777497787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:00,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276249657] [2022-03-03 19:34:00,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:34:00,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:00,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:00,006 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:34:00,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:34:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:34:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:00,476 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:34:00,476 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 [2022-03-03 19:34:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:00,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:00,967 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:34:00,968 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 [2022-03-03 19:34:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:01,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276249657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:01,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:01,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:34:01,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187724376] [2022-03-03 19:34:01,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:01,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:34:01,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:01,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:34:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:34:01,358 INFO L87 Difference]: Start difference. First operand 2757 states and 7374 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:20,123 INFO L93 Difference]: Finished difference Result 13846 states and 34888 transitions. [2022-03-03 19:34:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 350 states. [2022-03-03 19:34:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:34:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:20,143 INFO L225 Difference]: With dead ends: 13846 [2022-03-03 19:34:20,143 INFO L226 Difference]: Without dead ends: 12834 [2022-03-03 19:34:20,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65124 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=20027, Invalid=133245, Unknown=0, NotChecked=0, Total=153272 [2022-03-03 19:34:20,149 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1134 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 5924 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 6545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 5924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:20,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 1784 Invalid, 6545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 5924 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-03 19:34:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-03-03 19:34:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 3327. [2022-03-03 19:34:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.7194828622970535) internal successors, (9045), 3326 states have internal predecessors, (9045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9045 transitions. [2022-03-03 19:34:20,261 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9045 transitions. Word has length 37 [2022-03-03 19:34:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:20,261 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 9045 transitions. [2022-03-03 19:34:20,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9045 transitions. [2022-03-03 19:34:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:34:20,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:20,268 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] [2022-03-03 19:34:20,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:20,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 19:34:20,487 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:34:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2026265026, now seen corresponding path program 14 times [2022-03-03 19:34:20,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:20,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091496031] [2022-03-03 19:34:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:20,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:20,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091496031] [2022-03-03 19:34:20,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091496031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:20,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821069678] [2022-03-03 19:34:20,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:34:20,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:20,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:20,812 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:34:20,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:34:20,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:34:20,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:34:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:21,367 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:34:21,368 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 [2022-03-03 19:34:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:21,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:21,854 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:34:21,854 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 [2022-03-03 19:34:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:22,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821069678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:22,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:22,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:34:22,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758836101] [2022-03-03 19:34:22,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:22,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:34:22,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:34:22,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:34:22,363 INFO L87 Difference]: Start difference. First operand 3327 states and 9045 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:42,458 INFO L93 Difference]: Finished difference Result 16809 states and 42113 transitions. [2022-03-03 19:34:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 373 states. [2022-03-03 19:34:42,458 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:34:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:42,481 INFO L225 Difference]: With dead ends: 16809 [2022-03-03 19:34:42,481 INFO L226 Difference]: Without dead ends: 14346 [2022-03-03 19:34:42,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76932 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=24383, Invalid=147427, Unknown=0, NotChecked=0, Total=171810 [2022-03-03 19:34:42,491 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1850 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 4610 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 4610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:42,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 1276 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 4610 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-03 19:34:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14346 states. [2022-03-03 19:34:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14346 to 3535. [2022-03-03 19:34:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7190152801358236) internal successors, (9609), 3534 states have internal predecessors, (9609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9609 transitions. [2022-03-03 19:34:42,660 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9609 transitions. Word has length 37 [2022-03-03 19:34:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:42,660 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 9609 transitions. [2022-03-03 19:34:42,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9609 transitions. [2022-03-03 19:34:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:34:42,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:42,667 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] [2022-03-03 19:34:42,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:42,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:42,892 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:34:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1277334372, now seen corresponding path program 15 times [2022-03-03 19:34:42,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:42,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335825224] [2022-03-03 19:34:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:42,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:43,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:43,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335825224] [2022-03-03 19:34:43,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335825224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:43,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749484848] [2022-03-03 19:34:43,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:34:43,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:43,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:43,140 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:34:43,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:34:43,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:34:43,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:34:43,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:43,650 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:34:43,651 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 [2022-03-03 19:34:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:43,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:44,140 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:34:44,140 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 39 treesize of output 103 [2022-03-03 19:34:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:44,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749484848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:44,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:44,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:34:44,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621204099] [2022-03-03 19:34:44,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:44,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:34:44,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:34:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:34:44,749 INFO L87 Difference]: Start difference. First operand 3535 states and 9609 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:06,642 INFO L93 Difference]: Finished difference Result 15579 states and 39558 transitions. [2022-03-03 19:35:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 397 states. [2022-03-03 19:35:06,643 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:35:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:06,663 INFO L225 Difference]: With dead ends: 15579 [2022-03-03 19:35:06,664 INFO L226 Difference]: Without dead ends: 14122 [2022-03-03 19:35:06,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86518 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=24782, Invalid=167500, Unknown=0, NotChecked=0, Total=192282 [2022-03-03 19:35:06,672 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1551 mSDsluCounter, 3347 mSDsCounter, 0 mSdLazyCounter, 6306 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 7126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 6306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:06,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1551 Valid, 1653 Invalid, 7126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 6306 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-03 19:35:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14122 states. [2022-03-03 19:35:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14122 to 4322. [2022-03-03 19:35:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 2.7283036334181903) internal successors, (11789), 4321 states have internal predecessors, (11789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 11789 transitions. [2022-03-03 19:35:06,818 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 11789 transitions. Word has length 37 [2022-03-03 19:35:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:06,818 INFO L470 AbstractCegarLoop]: Abstraction has 4322 states and 11789 transitions. [2022-03-03 19:35:06,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 11789 transitions. [2022-03-03 19:35:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:35:06,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:06,824 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] [2022-03-03 19:35:06,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:35:07,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 19:35:07,025 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:35:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:07,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1393296378, now seen corresponding path program 16 times [2022-03-03 19:35:07,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:07,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85040988] [2022-03-03 19:35:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:07,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:07,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:07,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85040988] [2022-03-03 19:35:07,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85040988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:07,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025461135] [2022-03-03 19:35:07,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:35:07,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:07,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:07,316 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:35:07,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:35:07,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:35:07,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:07,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:35:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:07,789 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:35:07,790 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 [2022-03-03 19:35:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:07,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:08,286 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:35:08,287 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 [2022-03-03 19:35:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:08,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025461135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:08,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:08,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:35:08,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962129202] [2022-03-03 19:35:08,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:08,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:35:08,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:35:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:35:08,746 INFO L87 Difference]: Start difference. First operand 4322 states and 11789 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:31,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:31,089 INFO L93 Difference]: Finished difference Result 19425 states and 50281 transitions. [2022-03-03 19:35:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2022-03-03 19:35:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:35:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:31,119 INFO L225 Difference]: With dead ends: 19425 [2022-03-03 19:35:31,120 INFO L226 Difference]: Without dead ends: 18389 [2022-03-03 19:35:31,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88585 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=23496, Invalid=176760, Unknown=0, NotChecked=0, Total=200256 [2022-03-03 19:35:31,126 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1365 mSDsluCounter, 4482 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:31,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 2251 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-03 19:35:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18389 states. [2022-03-03 19:35:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18389 to 5336. [2022-03-03 19:35:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5336 states, 5335 states have (on average 2.7321462043111526) internal successors, (14576), 5335 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5336 states to 5336 states and 14576 transitions. [2022-03-03 19:35:31,319 INFO L78 Accepts]: Start accepts. Automaton has 5336 states and 14576 transitions. Word has length 37 [2022-03-03 19:35:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:31,319 INFO L470 AbstractCegarLoop]: Abstraction has 5336 states and 14576 transitions. [2022-03-03 19:35:31,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5336 states and 14576 transitions. [2022-03-03 19:35:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:35:31,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:31,329 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] [2022-03-03 19:35:31,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:35:31,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:31,532 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:35:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:31,533 INFO L85 PathProgramCache]: Analyzing trace with hash 730758682, now seen corresponding path program 17 times [2022-03-03 19:35:31,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:31,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724053018] [2022-03-03 19:35:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:31,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:35:31,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:31,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724053018] [2022-03-03 19:35:31,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724053018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:31,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149238511] [2022-03-03 19:35:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:35:31,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:31,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:31,754 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:35:31,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:35:31,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:35:31,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:31,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:35:31,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:32,213 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:35:32,213 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 [2022-03-03 19:35:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:32,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:32,688 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:35:32,689 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 [2022-03-03 19:35:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:33,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149238511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:33,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:33,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-03 19:35:33,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56876869] [2022-03-03 19:35:33,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:33,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:35:33,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:35:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:35:33,104 INFO L87 Difference]: Start difference. First operand 5336 states and 14576 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:55,984 INFO L93 Difference]: Finished difference Result 19470 states and 50048 transitions. [2022-03-03 19:35:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 420 states. [2022-03-03 19:35:55,984 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:35:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:56,014 INFO L225 Difference]: With dead ends: 19470 [2022-03-03 19:35:56,014 INFO L226 Difference]: Without dead ends: 17725 [2022-03-03 19:35:56,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99488 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=31398, Invalid=180662, Unknown=0, NotChecked=0, Total=212060 [2022-03-03 19:35:56,022 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1706 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 5853 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 6657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 5853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:56,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 1784 Invalid, 6657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 5853 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-03 19:35:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17725 states. [2022-03-03 19:35:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17725 to 6234. [2022-03-03 19:35:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6234 states, 6233 states have (on average 2.7328734156906784) internal successors, (17034), 6233 states have internal predecessors, (17034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 17034 transitions. [2022-03-03 19:35:56,210 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 17034 transitions. Word has length 37 [2022-03-03 19:35:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:56,210 INFO L470 AbstractCegarLoop]: Abstraction has 6234 states and 17034 transitions. [2022-03-03 19:35:56,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 17034 transitions. [2022-03-03 19:35:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:35:56,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:56,220 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] [2022-03-03 19:35:56,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:35:56,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:56,443 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:35:56,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:56,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1515417626, now seen corresponding path program 18 times [2022-03-03 19:35:56,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:56,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764214495] [2022-03-03 19:35:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:56,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:56,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:56,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764214495] [2022-03-03 19:35:56,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764214495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:56,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309776551] [2022-03-03 19:35:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:35:56,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:56,669 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:35:56,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:35:56,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:35:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:35:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:57,153 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:35:57,154 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 [2022-03-03 19:35:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:57,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:57,601 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:35:57,601 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 [2022-03-03 19:35:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:58,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309776551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:58,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:58,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-03 19:35:58,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873638836] [2022-03-03 19:35:58,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:58,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:35:58,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:35:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:35:58,136 INFO L87 Difference]: Start difference. First operand 6234 states and 17034 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:20,794 INFO L93 Difference]: Finished difference Result 31234 states and 81888 transitions. [2022-03-03 19:36:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-03-03 19:36:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:36:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:20,857 INFO L225 Difference]: With dead ends: 31234 [2022-03-03 19:36:20,857 INFO L226 Difference]: Without dead ends: 28790 [2022-03-03 19:36:20,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103084 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=29621, Invalid=188935, Unknown=0, NotChecked=0, Total=218556 [2022-03-03 19:36:20,866 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 2195 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 6351 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 7520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 6351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:20,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 1918 Invalid, 7520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 6351 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-03 19:36:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28790 states. [2022-03-03 19:36:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28790 to 9104. [2022-03-03 19:36:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 9103 states have (on average 2.730748105020323) internal successors, (24858), 9103 states have internal predecessors, (24858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 24858 transitions. [2022-03-03 19:36:21,210 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 24858 transitions. Word has length 37 [2022-03-03 19:36:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:21,210 INFO L470 AbstractCegarLoop]: Abstraction has 9104 states and 24858 transitions. [2022-03-03 19:36:21,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 24858 transitions. [2022-03-03 19:36:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:36:21,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:21,225 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] [2022-03-03 19:36:21,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:21,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:21,448 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:36:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:21,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1952777662, now seen corresponding path program 19 times [2022-03-03 19:36:21,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:21,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772819330] [2022-03-03 19:36:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:21,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:36:21,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:21,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772819330] [2022-03-03 19:36:21,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772819330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:21,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553712768] [2022-03-03 19:36:21,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:36:21,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:21,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:21,672 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:36:21,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:36:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:36:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:22,144 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:36:22,145 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 [2022-03-03 19:36:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:22,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:22,591 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:36:22,592 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 [2022-03-03 19:36:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:23,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553712768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:23,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:23,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-03 19:36:23,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486271199] [2022-03-03 19:36:23,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:23,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-03 19:36:23,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-03 19:36:23,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:36:23,227 INFO L87 Difference]: Start difference. First operand 9104 states and 24858 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:41,688 INFO L93 Difference]: Finished difference Result 32667 states and 86823 transitions. [2022-03-03 19:36:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2022-03-03 19:36:41,689 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:36:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:41,753 INFO L225 Difference]: With dead ends: 32667 [2022-03-03 19:36:41,753 INFO L226 Difference]: Without dead ends: 31087 [2022-03-03 19:36:41,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71981 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=22308, Invalid=132534, Unknown=0, NotChecked=0, Total=154842 [2022-03-03 19:36:41,760 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1751 mSDsluCounter, 4735 mSDsCounter, 0 mSdLazyCounter, 7318 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 8281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 7318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:41,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 2646 Invalid, 8281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 7318 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-03 19:36:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31087 states. [2022-03-03 19:36:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31087 to 11836. [2022-03-03 19:36:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11836 states, 11835 states have (on average 2.7356991972961553) internal successors, (32377), 11835 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11836 states to 11836 states and 32377 transitions. [2022-03-03 19:36:42,083 INFO L78 Accepts]: Start accepts. Automaton has 11836 states and 32377 transitions. Word has length 37 [2022-03-03 19:36:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:42,083 INFO L470 AbstractCegarLoop]: Abstraction has 11836 states and 32377 transitions. [2022-03-03 19:36:42,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 11836 states and 32377 transitions. [2022-03-03 19:36:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:36:42,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:42,102 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] [2022-03-03 19:36:42,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:42,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:42,315 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:36:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash 732190768, now seen corresponding path program 20 times [2022-03-03 19:36:42,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:42,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693121090] [2022-03-03 19:36:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:42,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:42,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:42,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693121090] [2022-03-03 19:36:42,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693121090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:42,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360058895] [2022-03-03 19:36:42,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:36:42,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:42,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:42,535 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:36:42,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:36:42,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:36:42,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:36:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:43,061 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:36:43,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2022-03-03 19:36:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:43,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:43,503 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:36:43,504 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 [2022-03-03 19:36:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:43,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360058895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:43,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:43,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-03 19:36:43,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632533644] [2022-03-03 19:36:43,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:43,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:36:43,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:43,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:36:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1722, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:36:43,996 INFO L87 Difference]: Start difference. First operand 11836 states and 32377 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:01,458 INFO L93 Difference]: Finished difference Result 33473 states and 89499 transitions. [2022-03-03 19:37:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 328 states. [2022-03-03 19:37:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:37:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:01,520 INFO L225 Difference]: With dead ends: 33473 [2022-03-03 19:37:01,520 INFO L226 Difference]: Without dead ends: 31834 [2022-03-03 19:37:01,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60160 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=20754, Invalid=115038, Unknown=0, NotChecked=0, Total=135792 [2022-03-03 19:37:01,525 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1317 mSDsluCounter, 2965 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 6074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:01,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1506 Invalid, 6074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-03 19:37:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31834 states. [2022-03-03 19:37:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31834 to 12555. [2022-03-03 19:37:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12555 states, 12554 states have (on average 2.736498327226382) internal successors, (34354), 12554 states have internal predecessors, (34354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12555 states to 12555 states and 34354 transitions. [2022-03-03 19:37:01,849 INFO L78 Accepts]: Start accepts. Automaton has 12555 states and 34354 transitions. Word has length 37 [2022-03-03 19:37:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:01,849 INFO L470 AbstractCegarLoop]: Abstraction has 12555 states and 34354 transitions. [2022-03-03 19:37:01,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 12555 states and 34354 transitions. [2022-03-03 19:37:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:37:01,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:01,868 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] [2022-03-03 19:37:01,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-03 19:37:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-03 19:37:02,068 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1932553214, now seen corresponding path program 21 times [2022-03-03 19:37:02,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:02,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182768204] [2022-03-03 19:37:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:02,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:02,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:02,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182768204] [2022-03-03 19:37:02,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182768204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:02,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133495674] [2022-03-03 19:37:02,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:02,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:02,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:02,285 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:02,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:37:02,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:37:02,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:02,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:37:02,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:02,755 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:37:02,756 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 [2022-03-03 19:37:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:02,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:03,195 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:37:03,196 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 39 treesize of output 103 [2022-03-03 19:37:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:03,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133495674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:03,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:03,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-03 19:37:03,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317752747] [2022-03-03 19:37:03,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:03,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-03 19:37:03,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:03,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-03 19:37:03,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:37:03,740 INFO L87 Difference]: Start difference. First operand 12555 states and 34354 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:18,920 INFO L93 Difference]: Finished difference Result 33192 states and 88992 transitions. [2022-03-03 19:37:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2022-03-03 19:37:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:37:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:18,981 INFO L225 Difference]: With dead ends: 33192 [2022-03-03 19:37:18,981 INFO L226 Difference]: Without dead ends: 31790 [2022-03-03 19:37:18,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43653 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=16321, Invalid=87041, Unknown=0, NotChecked=0, Total=103362 [2022-03-03 19:37:18,986 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1114 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 5203 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 5820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 5203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:18,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1794 Invalid, 5820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 5203 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-03 19:37:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31790 states. [2022-03-03 19:37:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31790 to 13207. [2022-03-03 19:37:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13207 states, 13206 states have (on average 2.7397395123428745) internal successors, (36181), 13206 states have internal predecessors, (36181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13207 states to 13207 states and 36181 transitions. [2022-03-03 19:37:19,414 INFO L78 Accepts]: Start accepts. Automaton has 13207 states and 36181 transitions. Word has length 37 [2022-03-03 19:37:19,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:19,414 INFO L470 AbstractCegarLoop]: Abstraction has 13207 states and 36181 transitions. [2022-03-03 19:37:19,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 13207 states and 36181 transitions. [2022-03-03 19:37:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:37:19,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:19,428 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] [2022-03-03 19:37:19,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:19,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:37:19,631 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1784070594, now seen corresponding path program 22 times [2022-03-03 19:37:19,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:19,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602684430] [2022-03-03 19:37:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:19,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:19,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:19,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602684430] [2022-03-03 19:37:19,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602684430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:19,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208966124] [2022-03-03 19:37:19,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:19,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:19,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:19,842 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:19,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:37:19,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:19,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:19,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:37:19,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:20,319 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:37:20,320 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 [2022-03-03 19:37:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:20,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:20,763 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:37:20,764 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 [2022-03-03 19:37:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:21,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208966124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:21,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:21,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:37:21,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605507616] [2022-03-03 19:37:21,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:21,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:37:21,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:21,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:37:21,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:37:21,246 INFO L87 Difference]: Start difference. First operand 13207 states and 36181 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:31,346 INFO L93 Difference]: Finished difference Result 27912 states and 74844 transitions. [2022-03-03 19:37:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-03-03 19:37:31,347 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:37:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:31,402 INFO L225 Difference]: With dead ends: 27912 [2022-03-03 19:37:31,402 INFO L226 Difference]: Without dead ends: 27500 [2022-03-03 19:37:31,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22323 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=8313, Invalid=50009, Unknown=0, NotChecked=0, Total=58322 [2022-03-03 19:37:31,407 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1123 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:31,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 536 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:37:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27500 states. [2022-03-03 19:37:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27500 to 13985. [2022-03-03 19:37:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13985 states, 13984 states have (on average 2.7281893592677346) internal successors, (38151), 13984 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13985 states to 13985 states and 38151 transitions. [2022-03-03 19:37:31,705 INFO L78 Accepts]: Start accepts. Automaton has 13985 states and 38151 transitions. Word has length 37 [2022-03-03 19:37:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:31,705 INFO L470 AbstractCegarLoop]: Abstraction has 13985 states and 38151 transitions. [2022-03-03 19:37:31,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 13985 states and 38151 transitions. [2022-03-03 19:37:31,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:37:31,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:31,720 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] [2022-03-03 19:37:31,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:31,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:31,921 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:31,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1519528804, now seen corresponding path program 23 times [2022-03-03 19:37:31,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:31,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127644356] [2022-03-03 19:37:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:32,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127644356] [2022-03-03 19:37:32,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127644356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:32,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605046729] [2022-03-03 19:37:32,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:32,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:32,187 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:32,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:37:32,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:37:32,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:32,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:37:32,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:32,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:32,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:32,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:32,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 [2022-03-03 19:37:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:33,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:33,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:33,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:33,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:33,275 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 [2022-03-03 19:37:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:33,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605046729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:33,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:33,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:37:33,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062222578] [2022-03-03 19:37:33,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:33,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:37:33,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:37:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:37:33,744 INFO L87 Difference]: Start difference. First operand 13985 states and 38151 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:48,124 INFO L93 Difference]: Finished difference Result 32196 states and 85016 transitions. [2022-03-03 19:37:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-03 19:37:48,124 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:37:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:48,186 INFO L225 Difference]: With dead ends: 32196 [2022-03-03 19:37:48,186 INFO L226 Difference]: Without dead ends: 30842 [2022-03-03 19:37:48,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39555 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=13928, Invalid=77578, Unknown=0, NotChecked=0, Total=91506 [2022-03-03 19:37:48,191 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1177 mSDsluCounter, 3531 mSDsCounter, 0 mSdLazyCounter, 4436 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 5681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 4436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:48,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1987 Invalid, 5681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 4436 Invalid, 0 Unknown, 620 Unchecked, 2.2s Time] [2022-03-03 19:37:48,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30842 states. [2022-03-03 19:37:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30842 to 14560. [2022-03-03 19:37:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14560 states, 14559 states have (on average 2.7218215536781374) internal successors, (39627), 14559 states have internal predecessors, (39627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 39627 transitions. [2022-03-03 19:37:48,580 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 39627 transitions. Word has length 37 [2022-03-03 19:37:48,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:48,580 INFO L470 AbstractCegarLoop]: Abstraction has 14560 states and 39627 transitions. [2022-03-03 19:37:48,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 39627 transitions. [2022-03-03 19:37:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:37:48,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:48,596 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] [2022-03-03 19:37:48,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:48,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:48,797 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1684148304, now seen corresponding path program 24 times [2022-03-03 19:37:48,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:48,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766260229] [2022-03-03 19:37:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:37:49,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:49,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766260229] [2022-03-03 19:37:49,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766260229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:49,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159163917] [2022-03-03 19:37:49,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:49,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:49,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:49,024 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:49,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:37:49,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:37:49,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:37:49,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:49,512 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:37:49,512 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 [2022-03-03 19:37:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:50,003 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:37:50,003 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 [2022-03-03 19:37:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:50,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159163917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:50,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:50,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-03 19:37:50,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057038230] [2022-03-03 19:37:50,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:50,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-03 19:37:50,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-03 19:37:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:37:50,387 INFO L87 Difference]: Start difference. First operand 14560 states and 39627 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) [2022-03-03 19:38:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:03,255 INFO L93 Difference]: Finished difference Result 31171 states and 82882 transitions. [2022-03-03 19:38:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-03-03 19:38:03,255 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 [2022-03-03 19:38:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:03,361 INFO L225 Difference]: With dead ends: 31171 [2022-03-03 19:38:03,361 INFO L226 Difference]: Without dead ends: 30819 [2022-03-03 19:38:03,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32626 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=11529, Invalid=68277, Unknown=0, NotChecked=0, Total=79806 [2022-03-03 19:38:03,364 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1218 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:03,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 754 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 3424 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 19:38:03,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30819 states. [2022-03-03 19:38:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30819 to 15192. [2022-03-03 19:38:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 2.7192416562438284) internal successors, (41308), 15191 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 41308 transitions. [2022-03-03 19:38:03,661 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 41308 transitions. Word has length 37 [2022-03-03 19:38:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:03,661 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 41308 transitions. [2022-03-03 19:38:03,661 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) [2022-03-03 19:38:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 41308 transitions. [2022-03-03 19:38:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:38:03,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:03,683 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] [2022-03-03 19:38:03,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:03,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 19:38:03,888 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2066976134, now seen corresponding path program 25 times [2022-03-03 19:38:03,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:03,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829274620] [2022-03-03 19:38:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:03,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:38:04,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:04,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829274620] [2022-03-03 19:38:04,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829274620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:04,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652742245] [2022-03-03 19:38:04,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:38:04,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:04,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:04,081 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:04,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:38:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:38:04,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:04,574 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:38:04,574 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 [2022-03-03 19:38:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:04,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:05,004 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:38:05,004 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 [2022-03-03 19:38:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:05,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652742245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:05,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:05,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-03 19:38:05,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674717187] [2022-03-03 19:38:05,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-03 19:38:05,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-03 19:38:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:38:05,428 INFO L87 Difference]: Start difference. First operand 15192 states and 41308 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:20,685 INFO L93 Difference]: Finished difference Result 40939 states and 109794 transitions. [2022-03-03 19:38:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2022-03-03 19:38:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:38:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:20,763 INFO L225 Difference]: With dead ends: 40939 [2022-03-03 19:38:20,764 INFO L226 Difference]: Without dead ends: 39453 [2022-03-03 19:38:20,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49162 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=16678, Invalid=95212, Unknown=0, NotChecked=0, Total=111890 [2022-03-03 19:38:20,769 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1246 mSDsluCounter, 3589 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 5763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:20,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 2049 Invalid, 5763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-03 19:38:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39453 states. [2022-03-03 19:38:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39453 to 16120. [2022-03-03 19:38:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16120 states, 16119 states have (on average 2.7244866306842854) internal successors, (43916), 16119 states have internal predecessors, (43916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16120 states to 16120 states and 43916 transitions. [2022-03-03 19:38:21,247 INFO L78 Accepts]: Start accepts. Automaton has 16120 states and 43916 transitions. Word has length 37 [2022-03-03 19:38:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:21,247 INFO L470 AbstractCegarLoop]: Abstraction has 16120 states and 43916 transitions. [2022-03-03 19:38:21,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 16120 states and 43916 transitions. [2022-03-03 19:38:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:38:21,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:21,271 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] [2022-03-03 19:38:21,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:38:21,487 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1940938686, now seen corresponding path program 26 times [2022-03-03 19:38:21,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:21,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450097275] [2022-03-03 19:38:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:21,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:21,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450097275] [2022-03-03 19:38:21,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450097275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:21,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317165233] [2022-03-03 19:38:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:38:21,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:21,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:21,712 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:21,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:38:21,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:38:21,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:38:21,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:22,214 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:38:22,214 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 [2022-03-03 19:38:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:22,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:22,664 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:38:22,664 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 [2022-03-03 19:38:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:23,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317165233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:23,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:23,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:38:23,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39548075] [2022-03-03 19:38:23,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:23,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:38:23,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:23,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:38:23,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:38:23,237 INFO L87 Difference]: Start difference. First operand 16120 states and 43916 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:36,854 INFO L93 Difference]: Finished difference Result 35540 states and 95539 transitions. [2022-03-03 19:38:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-03 19:38:36,854 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:38:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:36,920 INFO L225 Difference]: With dead ends: 35540 [2022-03-03 19:38:36,920 INFO L226 Difference]: Without dead ends: 34093 [2022-03-03 19:38:36,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36899 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=12408, Invalid=78494, Unknown=0, NotChecked=0, Total=90902 [2022-03-03 19:38:36,925 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1217 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 4786 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 4786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:36,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 1248 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 4786 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-03 19:38:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34093 states. [2022-03-03 19:38:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34093 to 17528. [2022-03-03 19:38:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17528 states, 17527 states have (on average 2.7226564728704283) internal successors, (47720), 17527 states have internal predecessors, (47720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17528 states to 17528 states and 47720 transitions. [2022-03-03 19:38:37,356 INFO L78 Accepts]: Start accepts. Automaton has 17528 states and 47720 transitions. Word has length 37 [2022-03-03 19:38:37,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:37,356 INFO L470 AbstractCegarLoop]: Abstraction has 17528 states and 47720 transitions. [2022-03-03 19:38:37,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 17528 states and 47720 transitions. [2022-03-03 19:38:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:38:37,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:37,377 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] [2022-03-03 19:38:37,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:37,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:38:37,578 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash 949570788, now seen corresponding path program 27 times [2022-03-03 19:38:37,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:37,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993156649] [2022-03-03 19:38:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:37,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:37,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:37,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993156649] [2022-03-03 19:38:37,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993156649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:37,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499615903] [2022-03-03 19:38:37,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:38:37,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:37,807 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:37,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:38:37,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:38:37,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:37,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:38:37,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:38,296 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:38:38,297 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 [2022-03-03 19:38:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:38,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:38,751 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:38:38,751 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 39 treesize of output 103 [2022-03-03 19:38:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:39,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499615903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:39,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:39,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-03 19:38:39,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758110204] [2022-03-03 19:38:39,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:39,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:38:39,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:38:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:38:39,346 INFO L87 Difference]: Start difference. First operand 17528 states and 47720 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:52,458 INFO L93 Difference]: Finished difference Result 36001 states and 97032 transitions. [2022-03-03 19:38:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-03-03 19:38:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:38:52,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:52,529 INFO L225 Difference]: With dead ends: 36001 [2022-03-03 19:38:52,530 INFO L226 Difference]: Without dead ends: 35103 [2022-03-03 19:38:52,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28391 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=11364, Invalid=62348, Unknown=0, NotChecked=0, Total=73712 [2022-03-03 19:38:52,533 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1001 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 4003 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 4003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:52,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 875 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 4003 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:38:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35103 states. [2022-03-03 19:38:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35103 to 18000. [2022-03-03 19:38:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18000 states, 17999 states have (on average 2.716039779987777) internal successors, (48886), 17999 states have internal predecessors, (48886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18000 states to 18000 states and 48886 transitions. [2022-03-03 19:38:53,030 INFO L78 Accepts]: Start accepts. Automaton has 18000 states and 48886 transitions. Word has length 37 [2022-03-03 19:38:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:53,030 INFO L470 AbstractCegarLoop]: Abstraction has 18000 states and 48886 transitions. [2022-03-03 19:38:53,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 18000 states and 48886 transitions. [2022-03-03 19:38:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:38:53,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:53,052 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] [2022-03-03 19:38:53,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:53,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:53,253 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:53,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1131314986, now seen corresponding path program 28 times [2022-03-03 19:38:53,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:53,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126524324] [2022-03-03 19:38:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:53,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:38:53,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:53,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126524324] [2022-03-03 19:38:53,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126524324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:53,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936991665] [2022-03-03 19:38:53,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:38:53,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:53,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:53,447 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:53,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:38:53,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:38:53,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:53,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:38:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:53,908 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:38:53,908 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 [2022-03-03 19:38:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:53,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:54,349 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:38:54,350 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 [2022-03-03 19:38:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:54,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936991665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:54,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:54,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-03 19:38:54,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832833207] [2022-03-03 19:38:54,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:54,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:38:54,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:38:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:38:54,819 INFO L87 Difference]: Start difference. First operand 18000 states and 48886 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:14,550 INFO L93 Difference]: Finished difference Result 47599 states and 127744 transitions. [2022-03-03 19:39:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-03-03 19:39:14,551 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:39:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:14,642 INFO L225 Difference]: With dead ends: 47599 [2022-03-03 19:39:14,642 INFO L226 Difference]: Without dead ends: 46244 [2022-03-03 19:39:14,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62634 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=20490, Invalid=123530, Unknown=0, NotChecked=0, Total=144020 [2022-03-03 19:39:14,647 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1306 mSDsluCounter, 2948 mSDsCounter, 0 mSdLazyCounter, 6007 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 6623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 6007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:14,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 1489 Invalid, 6623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 6007 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-03 19:39:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2022-03-03 19:39:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 20798. [2022-03-03 19:39:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20798 states, 20797 states have (on average 2.712747030821753) internal successors, (56417), 20797 states have internal predecessors, (56417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20798 states to 20798 states and 56417 transitions. [2022-03-03 19:39:15,152 INFO L78 Accepts]: Start accepts. Automaton has 20798 states and 56417 transitions. Word has length 37 [2022-03-03 19:39:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:15,153 INFO L470 AbstractCegarLoop]: Abstraction has 20798 states and 56417 transitions. [2022-03-03 19:39:15,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 20798 states and 56417 transitions. [2022-03-03 19:39:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:39:15,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:15,177 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] [2022-03-03 19:39:15,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:15,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:15,389 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:39:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash -346656042, now seen corresponding path program 29 times [2022-03-03 19:39:15,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:15,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247096821] [2022-03-03 19:39:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:15,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:39:15,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:15,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247096821] [2022-03-03 19:39:15,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247096821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:15,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809835294] [2022-03-03 19:39:15,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:39:15,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:15,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:15,606 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:39:15,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:39:15,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:39:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:15,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:39:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:16,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:16,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:16,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:16,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,196 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 [2022-03-03 19:39:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:16,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:16,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:16,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:39:16,646 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 [2022-03-03 19:39:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:17,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809835294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:17,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:17,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-03 19:39:17,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996705433] [2022-03-03 19:39:17,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:17,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:39:17,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:17,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:39:17,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:39:17,174 INFO L87 Difference]: Start difference. First operand 20798 states and 56417 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) [2022-03-03 19:39:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:34,856 INFO L93 Difference]: Finished difference Result 54650 states and 147257 transitions. [2022-03-03 19:39:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2022-03-03 19:39:34,856 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 [2022-03-03 19:39:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:34,975 INFO L225 Difference]: With dead ends: 54650 [2022-03-03 19:39:34,975 INFO L226 Difference]: Without dead ends: 53564 [2022-03-03 19:39:34,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59804 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=19529, Invalid=114061, Unknown=0, NotChecked=0, Total=133590 [2022-03-03 19:39:34,980 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1205 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 4671 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 5926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 4671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 666 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:34,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1691 Invalid, 5926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 4671 Invalid, 0 Unknown, 666 Unchecked, 2.4s Time] [2022-03-03 19:39:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53564 states. [2022-03-03 19:39:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53564 to 22756. [2022-03-03 19:39:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22756 states, 22755 states have (on average 2.711008569545155) internal successors, (61689), 22755 states have internal predecessors, (61689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22756 states to 22756 states and 61689 transitions. [2022-03-03 19:39:35,595 INFO L78 Accepts]: Start accepts. Automaton has 22756 states and 61689 transitions. Word has length 37 [2022-03-03 19:39:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:35,595 INFO L470 AbstractCegarLoop]: Abstraction has 22756 states and 61689 transitions. [2022-03-03 19:39:35,595 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) [2022-03-03 19:39:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 22756 states and 61689 transitions. [2022-03-03 19:39:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-03 19:39:35,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:35,624 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] [2022-03-03 19:39:35,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:35,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:35,839 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:39:35,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2073145783, now seen corresponding path program 30 times [2022-03-03 19:39:35,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:35,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310780552] [2022-03-03 19:39:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:35,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:36,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:36,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310780552] [2022-03-03 19:39:36,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310780552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:36,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355911616] [2022-03-03 19:39:36,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:39:36,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:36,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:36,064 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:39:36,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:39:36,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:39:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:39:36,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:36,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:36,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355911616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:36,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:36,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-03 19:39:36,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796027103] [2022-03-03 19:39:36,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:36,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:39:36,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:39:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:39:36,215 INFO L87 Difference]: Start difference. First operand 22756 states and 61689 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) [2022-03-03 19:39:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:36,491 INFO L93 Difference]: Finished difference Result 30249 states and 82841 transitions. [2022-03-03 19:39:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:39:36,492 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 [2022-03-03 19:39:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:36,554 INFO L225 Difference]: With dead ends: 30249 [2022-03-03 19:39:36,554 INFO L226 Difference]: Without dead ends: 30177 [2022-03-03 19:39:36,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:39:36,555 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:36,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 110 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:39:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30177 states. [2022-03-03 19:39:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30177 to 29234. [2022-03-03 19:39:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29234 states, 29233 states have (on average 2.7446721171279034) internal successors, (80235), 29233 states have internal predecessors, (80235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29234 states to 29234 states and 80235 transitions. [2022-03-03 19:39:37,193 INFO L78 Accepts]: Start accepts. Automaton has 29234 states and 80235 transitions. Word has length 40 [2022-03-03 19:39:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:37,193 INFO L470 AbstractCegarLoop]: Abstraction has 29234 states and 80235 transitions. [2022-03-03 19:39:37,193 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) [2022-03-03 19:39:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 29234 states and 80235 transitions. [2022-03-03 19:39:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-03 19:39:37,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:37,321 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] [2022-03-03 19:39:37,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:37,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-03 19:39:37,535 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:39:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1650713771, now seen corresponding path program 31 times [2022-03-03 19:39:37,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:37,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553470163] [2022-03-03 19:39:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:37,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:37,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553470163] [2022-03-03 19:39:37,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553470163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:37,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223876508] [2022-03-03 19:39:37,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:39:37,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:37,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:37,873 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:39:37,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:39:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:38,664 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-03 19:39:38,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-03-03 19:39:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:38,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:39,420 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:39:39,420 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 [2022-03-03 19:39:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:41,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223876508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:41,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:41,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-03 19:39:41,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562207780] [2022-03-03 19:39:41,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:41,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-03 19:39:41,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:41,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-03 19:39:41,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2904, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:39:41,213 INFO L87 Difference]: Start difference. First operand 29234 states and 80235 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:01,773 INFO L93 Difference]: Finished difference Result 44200 states and 117713 transitions. [2022-03-03 19:40:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-03-03 19:40:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-03 19:40:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:01,860 INFO L225 Difference]: With dead ends: 44200 [2022-03-03 19:40:01,860 INFO L226 Difference]: Without dead ends: 42253 [2022-03-03 19:40:01,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64716 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=21746, Invalid=132310, Unknown=0, NotChecked=0, Total=154056 [2022-03-03 19:40:01,866 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2342 mSDsluCounter, 4675 mSDsCounter, 0 mSdLazyCounter, 8694 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2342 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 8694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:01,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2342 Valid, 2391 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 8694 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-03 19:40:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42253 states. [2022-03-03 19:40:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42253 to 30116. [2022-03-03 19:40:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30116 states, 30115 states have (on average 2.74394819857214) internal successors, (82634), 30115 states have internal predecessors, (82634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30116 states to 30116 states and 82634 transitions. [2022-03-03 19:40:02,522 INFO L78 Accepts]: Start accepts. Automaton has 30116 states and 82634 transitions. Word has length 43 [2022-03-03 19:40:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:02,523 INFO L470 AbstractCegarLoop]: Abstraction has 30116 states and 82634 transitions. [2022-03-03 19:40:02,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30116 states and 82634 transitions. [2022-03-03 19:40:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-03 19:40:02,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:02,566 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] [2022-03-03 19:40:02,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:02,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:02,767 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:40:02,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1112247061, now seen corresponding path program 32 times [2022-03-03 19:40:02,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:02,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750722002] [2022-03-03 19:40:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:02,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:03,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:03,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750722002] [2022-03-03 19:40:03,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750722002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:03,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237654636] [2022-03-03 19:40:03,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:40:03,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:03,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:03,152 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:03,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:40:03,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:40:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:03,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:04,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:04,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:04,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:04,068 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 [2022-03-03 19:40:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:04,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:05,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:05,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:40:05,142 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 [2022-03-03 19:40:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:06,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237654636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:06,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:06,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-03 19:40:06,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342048982] [2022-03-03 19:40:06,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:06,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-03 19:40:06,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:06,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-03 19:40:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:40:06,076 INFO L87 Difference]: Start difference. First operand 30116 states and 82634 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:20,802 INFO L93 Difference]: Finished difference Result 42109 states and 115194 transitions. [2022-03-03 19:40:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-03-03 19:40:20,802 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-03 19:40:20,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:20,899 INFO L225 Difference]: With dead ends: 42109 [2022-03-03 19:40:20,899 INFO L226 Difference]: Without dead ends: 42066 [2022-03-03 19:40:20,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 96 SyntacticMatches, 28 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30717 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=9279, Invalid=60153, Unknown=0, NotChecked=0, Total=69432 [2022-03-03 19:40:20,903 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 633 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 5953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4978 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:20,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1035 Invalid, 5953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 897 Invalid, 0 Unknown, 4978 Unchecked, 0.4s Time] [2022-03-03 19:40:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42066 states. [2022-03-03 19:40:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42066 to 30630. [2022-03-03 19:40:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30630 states, 30629 states have (on average 2.743151914851938) internal successors, (84020), 30629 states have internal predecessors, (84020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30630 states to 30630 states and 84020 transitions. [2022-03-03 19:40:21,574 INFO L78 Accepts]: Start accepts. Automaton has 30630 states and 84020 transitions. Word has length 43 [2022-03-03 19:40:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:21,574 INFO L470 AbstractCegarLoop]: Abstraction has 30630 states and 84020 transitions. [2022-03-03 19:40:21,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 30630 states and 84020 transitions. [2022-03-03 19:40:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-03 19:40:21,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:21,618 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] [2022-03-03 19:40:21,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:21,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:21,818 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:40:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash -129342371, now seen corresponding path program 33 times [2022-03-03 19:40:21,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:21,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911891441] [2022-03-03 19:40:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:22,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:22,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911891441] [2022-03-03 19:40:22,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911891441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:22,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734293283] [2022-03-03 19:40:22,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:40:22,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:22,149 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:22,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:40:22,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:40:22,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:22,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:40:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:22,923 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-03 19:40:22,923 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 [2022-03-03 19:40:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:22,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:23,705 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:40:23,706 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 [2022-03-03 19:40:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:26,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734293283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:26,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:26,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-03 19:40:26,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223589064] [2022-03-03 19:40:26,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:26,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-03 19:40:26,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:26,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-03 19:40:26,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2914, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:40:26,213 INFO L87 Difference]: Start difference. First operand 30630 states and 84020 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:09,820 INFO L93 Difference]: Finished difference Result 55936 states and 147102 transitions. [2022-03-03 19:41:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 596 states. [2022-03-03 19:41:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-03 19:41:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:09,953 INFO L225 Difference]: With dead ends: 55936 [2022-03-03 19:41:09,954 INFO L226 Difference]: Without dead ends: 53473 [2022-03-03 19:41:09,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 648 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189462 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=52090, Invalid=369760, Unknown=0, NotChecked=0, Total=421850 [2022-03-03 19:41:09,969 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1682 mSDsluCounter, 6005 mSDsCounter, 0 mSdLazyCounter, 12509 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 13433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 12509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:09,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 2727 Invalid, 13433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 12509 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-03-03 19:41:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53473 states. [2022-03-03 19:41:10,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53473 to 30690. [2022-03-03 19:41:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30690 states, 30689 states have (on average 2.7449248916549904) internal successors, (84239), 30689 states have internal predecessors, (84239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30690 states to 30690 states and 84239 transitions. [2022-03-03 19:41:10,875 INFO L78 Accepts]: Start accepts. Automaton has 30690 states and 84239 transitions. Word has length 43 [2022-03-03 19:41:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:10,875 INFO L470 AbstractCegarLoop]: Abstraction has 30690 states and 84239 transitions. [2022-03-03 19:41:10,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 30690 states and 84239 transitions. [2022-03-03 19:41:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-03 19:41:10,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:10,920 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] [2022-03-03 19:41:10,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:11,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-03 19:41:11,121 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:11,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2103614959, now seen corresponding path program 34 times [2022-03-03 19:41:11,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:11,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366470299] [2022-03-03 19:41:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:11,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:11,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:11,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366470299] [2022-03-03 19:41:11,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366470299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:11,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782003187] [2022-03-03 19:41:11,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:41:11,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:11,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:11,541 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:11,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:41:11,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:41:11,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:12,487 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-03 19:41:12,487 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 [2022-03-03 19:41:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:12,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:13,261 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:41:13,262 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 [2022-03-03 19:41:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:15,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782003187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:15,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:15,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-03 19:41:15,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34251696] [2022-03-03 19:41:15,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:15,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-03 19:41:15,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-03 19:41:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2922, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:41:15,171 INFO L87 Difference]: Start difference. First operand 30690 states and 84239 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:59,687 INFO L93 Difference]: Finished difference Result 58865 states and 154985 transitions. [2022-03-03 19:41:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 628 states. [2022-03-03 19:41:59,688 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-03 19:41:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:59,813 INFO L225 Difference]: With dead ends: 58865 [2022-03-03 19:41:59,813 INFO L226 Difference]: Without dead ends: 56451 [2022-03-03 19:41:59,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 680 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210674 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=53546, Invalid=410896, Unknown=0, NotChecked=0, Total=464442 [2022-03-03 19:41:59,832 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1732 mSDsluCounter, 5833 mSDsCounter, 0 mSdLazyCounter, 11059 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 12080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 11059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:59,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 2854 Invalid, 12080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 11059 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-03-03 19:41:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56451 states. [2022-03-03 19:42:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56451 to 31926. [2022-03-03 19:42:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31926 states, 31925 states have (on average 2.74894283476899) internal successors, (87760), 31925 states have internal predecessors, (87760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31926 states to 31926 states and 87760 transitions. [2022-03-03 19:42:00,841 INFO L78 Accepts]: Start accepts. Automaton has 31926 states and 87760 transitions. Word has length 43 [2022-03-03 19:42:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:00,841 INFO L470 AbstractCegarLoop]: Abstraction has 31926 states and 87760 transitions. [2022-03-03 19:42:00,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 31926 states and 87760 transitions. [2022-03-03 19:42:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-03 19:42:00,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:00,889 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] [2022-03-03 19:42:00,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:01,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:42:01,090 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:01,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1987652953, now seen corresponding path program 35 times [2022-03-03 19:42:01,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:01,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123942854] [2022-03-03 19:42:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:01,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:01,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123942854] [2022-03-03 19:42:01,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123942854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:01,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374937576] [2022-03-03 19:42:01,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:42:01,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:01,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:01,507 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:01,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:42:01,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:42:01,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:42:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:02,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:02,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:02,618 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 48 treesize of output 22 [2022-03-03 19:42:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:02,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:03,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:03,667 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 129 [2022-03-03 19:42:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:04,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374937576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:04,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:04,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-03 19:42:04,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544394047] [2022-03-03 19:42:04,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:04,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-03 19:42:04,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:04,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-03 19:42:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:42:04,337 INFO L87 Difference]: Start difference. First operand 31926 states and 87760 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:48,380 INFO L93 Difference]: Finished difference Result 109906 states and 296717 transitions. [2022-03-03 19:42:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 575 states. [2022-03-03 19:42:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-03 19:42:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:48,891 INFO L225 Difference]: With dead ends: 109906 [2022-03-03 19:42:48,892 INFO L226 Difference]: Without dead ends: 108076 [2022-03-03 19:42:48,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 149 SyntacticMatches, 54 SemanticMatches, 616 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 194353 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=50892, Invalid=330414, Unknown=0, NotChecked=0, Total=381306 [2022-03-03 19:42:48,903 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1729 mSDsluCounter, 9182 mSDsCounter, 0 mSdLazyCounter, 6348 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 24523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 6348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17424 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:48,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 2953 Invalid, 24523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 6348 Invalid, 0 Unknown, 17424 Unchecked, 3.2s Time] [2022-03-03 19:42:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108076 states. [2022-03-03 19:42:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108076 to 39267. [2022-03-03 19:42:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39267 states, 39266 states have (on average 2.752355727601487) internal successors, (108074), 39266 states have internal predecessors, (108074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39267 states to 39267 states and 108074 transitions. [2022-03-03 19:42:50,872 INFO L78 Accepts]: Start accepts. Automaton has 39267 states and 108074 transitions. Word has length 43 [2022-03-03 19:42:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:50,872 INFO L470 AbstractCegarLoop]: Abstraction has 39267 states and 108074 transitions. [2022-03-03 19:42:50,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 39267 states and 108074 transitions. [2022-03-03 19:42:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-03 19:42:50,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:50,929 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] [2022-03-03 19:42:50,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:51,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:42:51,130 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1298369877, now seen corresponding path program 36 times [2022-03-03 19:42:51,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:51,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206401818] [2022-03-03 19:42:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:51,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:51,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206401818] [2022-03-03 19:42:51,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206401818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:51,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508233980] [2022-03-03 19:42:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:42:51,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:51,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:51,545 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:51,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:42:51,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:42:51,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:51,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:52,309 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-03 19:42:52,309 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 [2022-03-03 19:42:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:52,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:53,132 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:42:53,132 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 [2022-03-03 19:42:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:55,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508233980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:55,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:55,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-03 19:42:55,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785751357] [2022-03-03 19:42:55,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:55,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-03 19:42:55,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-03 19:42:55,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2915, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:42:55,231 INFO L87 Difference]: Start difference. First operand 39267 states and 108074 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:39,516 INFO L93 Difference]: Finished difference Result 77276 states and 205583 transitions. [2022-03-03 19:43:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 609 states. [2022-03-03 19:43:39,517 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-03 19:43:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:39,894 INFO L225 Difference]: With dead ends: 77276 [2022-03-03 19:43:39,894 INFO L226 Difference]: Without dead ends: 73306 [2022-03-03 19:43:39,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204061 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=56273, Invalid=382633, Unknown=0, NotChecked=0, Total=438906 [2022-03-03 19:43:39,921 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 2233 mSDsluCounter, 5723 mSDsCounter, 0 mSdLazyCounter, 11275 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 12368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 11275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:39,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2233 Valid, 2675 Invalid, 12368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 11275 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-03 19:43:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73306 states. [2022-03-03 19:43:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73306 to 39944. [2022-03-03 19:43:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39944 states, 39943 states have (on average 2.7510202037904015) internal successors, (109884), 39943 states have internal predecessors, (109884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39944 states to 39944 states and 109884 transitions. [2022-03-03 19:43:41,199 INFO L78 Accepts]: Start accepts. Automaton has 39944 states and 109884 transitions. Word has length 43 [2022-03-03 19:43:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:41,199 INFO L470 AbstractCegarLoop]: Abstraction has 39944 states and 109884 transitions. [2022-03-03 19:43:41,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:41,199 INFO L276 IsEmpty]: Start isEmpty. Operand 39944 states and 109884 transitions. [2022-03-03 19:43:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-03 19:43:41,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:41,272 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] [2022-03-03 19:43:41,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:41,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:43:41,472 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash -347552145, now seen corresponding path program 37 times [2022-03-03 19:43:41,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:41,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976727022] [2022-03-03 19:43:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:42,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:42,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976727022] [2022-03-03 19:43:42,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976727022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:42,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022391038] [2022-03-03 19:43:42,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:43:42,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:42,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:42,116 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:42,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:43:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:43,155 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-03 19:43:43,155 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 [2022-03-03 19:43:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:43,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:43,923 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:43:43,923 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 [2022-03-03 19:43:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:45,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022391038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:45,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:45,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-03 19:43:45,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268512589] [2022-03-03 19:43:45,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:45,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-03 19:43:45,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-03 19:43:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2924, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:43:45,202 INFO L87 Difference]: Start difference. First operand 39944 states and 109884 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-03 19:44:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 543 states. [2022-03-03 19:44:22,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 595 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159732 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=42258, Invalid=313554, Unknown=0, NotChecked=0, Total=355812 [2022-03-03 19:44:22,646 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1920 mSDsluCounter, 3028 mSDsCounter, 0 mSdLazyCounter, 8243 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 9265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 8243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:22,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 844 Invalid, 9265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 8243 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-03 19:44:22,647 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 19:44:22,660 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:44:22,660 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:44:22,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:22,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:44:22,848 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 543 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 597 known predicates. [2022-03-03 19:44:22,850 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 19:44:22,850 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 19:44:22,850 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 19:44:22,853 INFO L732 BasicCegarLoop]: Path program histogram: [37, 2, 1] [2022-03-03 19:44:22,856 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 19:44:22,856 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 19:44:22,866 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 07:44:22 BasicIcfg [2022-03-03 19:44:22,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 19:44:22,866 INFO L158 Benchmark]: Toolchain (without parser) took 713044.22ms. Allocated memory was 185.6MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 144.8MB in the beginning and 1.1GB in the end (delta: -927.1MB). Peak memory consumption was 696.6MB. Max. memory is 8.0GB. [2022-03-03 19:44:22,867 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 185.6MB. Free memory is still 145.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:44:22,867 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.85ms. Allocated memory is still 185.6MB. Free memory was 144.7MB in the beginning and 143.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:44:22,867 INFO L158 Benchmark]: Boogie Preprocessor took 18.38ms. Allocated memory is still 185.6MB. Free memory was 143.2MB in the beginning and 142.3MB in the end (delta: 957.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:44:22,867 INFO L158 Benchmark]: RCFGBuilder took 185.40ms. Allocated memory is still 185.6MB. Free memory was 142.2MB in the beginning and 132.8MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 19:44:22,867 INFO L158 Benchmark]: TraceAbstraction took 712805.40ms. Allocated memory was 185.6MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 132.3MB in the beginning and 1.1GB in the end (delta: -939.7MB). Peak memory consumption was 684.0MB. Max. memory is 8.0GB. [2022-03-03 19:44:22,867 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 0.14ms. Allocated memory is still 185.6MB. Free memory is still 145.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.85ms. Allocated memory is still 185.6MB. Free memory was 144.7MB in the beginning and 143.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.38ms. Allocated memory is still 185.6MB. Free memory was 143.2MB in the beginning and 142.3MB in the end (delta: 957.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 185.40ms. Allocated memory is still 185.6MB. Free memory was 142.2MB in the beginning and 132.8MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 712805.40ms. Allocated memory was 185.6MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 132.3MB in the beginning and 1.1GB in the end (delta: -939.7MB). Peak memory consumption was 684.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 543 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 597 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 (39944states) and FLOYD_HOARE automaton (currently 543 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 597 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 (39944states) and FLOYD_HOARE automaton (currently 543 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 597 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 (39944states) and FLOYD_HOARE automaton (currently 543 states, 58 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 597 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: 712.7s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.8s, AutomataDifference: 620.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 45047 SdHoareTripleChecker+Valid, 85.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45047 mSDsluCounter, 50371 SdHoareTripleChecker+Invalid, 72.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25744 IncrementalHoareTripleChecker+Unchecked, 104942 mSDsCounter, 21544 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 173720 IncrementalHoareTripleChecker+Invalid, 221008 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21544 mSolverCounterUnsat, 2526 mSDtfsCounter, 173720 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14045 GetRequests, 1978 SyntacticMatches, 115 SemanticMatches, 11951 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2271406 ImplicationChecksByTransitivity, 532.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39944occurred in iteration=39, InterpolantAutomatonStates: 10137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.5s AutomataMinimizationTime, 39 MinimizatonAttempts, 492652 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 67.9s InterpolantComputationTime, 2768 NumberOfCodeBlocks, 2768 NumberOfCodeBlocksAsserted, 141 NumberOfCheckSat, 4008 ConstructedInterpolants, 101 QuantifiedInterpolants, 54679 SizeOfPredicates, 447 NumberOfNonLiveVariables, 3290 ConjunctsInSsa, 899 ConjunctsInUnsatCore, 114 InterpolantComputations, 3 PerfectInterpolantSequences, 268/2722 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