/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 20:02:37,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 20:02:37,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 20:02:37,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-03 20:02:37,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-03 20:02:37,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-03 20:02:37,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-03 20:02:37,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-03 20:02:37,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-03 20:02:37,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-03 20:02:37,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-03 20:02:37,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-03 20:02:37,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 20:02:37,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 20:02:37,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 20:02:37,432 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 20:02:37,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 20:02:37,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 20:02:37,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 20:02:37,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 20:02:37,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 20:02:37,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 20:02:37,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 20:02:37,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 20:02:37,468 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 20:02:37,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 20:02:37,469 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 20:02:37,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 20:02:37,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 20:02:37,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 20:02:37,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 20:02:37,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 20:02:37,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 20:02:37,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 20:02:37,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 20:02:37,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 20:02:37,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 20:02:37,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 20:02:37,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 20:02:37,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 20:02:37,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 20:02:37,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:02:37,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 20:02:37,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 20:02:37,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 20:02:37,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 20:02:37,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 20:02:37,472 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 20:02:37,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 20:02:37,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 20:02:37,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 20:02:37,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 20:02:37,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 20:02:37,690 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 20:02:37,693 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 20:02:37,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl [2022-03-03 20:02:37,694 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl' [2022-03-03 20:02:37,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 20:02:37,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 20:02:37,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 20:02:37,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 20:02:37,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 20:02:37,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,749 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 20:02:37,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 20:02:37,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 20:02:37,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 20:02:37,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 20:02:37,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 20:02:37,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 20:02:37,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 20:02:37,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 20:02:37,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/1) ... [2022-03-03 20:02:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:02:37,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:37,805 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 20:02:37,817 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 20:02:37,841 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 20:02:37,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 20:02:37,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 20:02:37,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 20:02:37,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 20:02:37,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 20:02:37,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 20:02:37,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 20:02:37,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 20:02:37,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 20:02:37,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 20:02:37,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 20:02:37,843 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 20:02:37,887 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 20:02:37,888 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 20:02:38,002 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 20:02:38,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 20:02:38,021 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 20:02:38,022 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:02:38 BoogieIcfgContainer [2022-03-03 20:02:38,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 20:02:38,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 20:02:38,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 20:02:38,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 20:02:38,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:02:37" (1/2) ... [2022-03-03 20:02:38,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a01898 and model type min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:02:38, skipping insertion in model container [2022-03-03 20:02:38,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:02:38" (2/2) ... [2022-03-03 20:02:38,038 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array.wvr.bpl [2022-03-03 20:02:38,046 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 20:02:38,046 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 20:02:38,046 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 20:02:38,046 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 20:02:38,110 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 20:02:38,169 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 20:02:38,178 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 20:02:38,178 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 20:02:38,191 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-03 20:02:38,240 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 20:02:38,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:38,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:38,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:38,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-03-03 20:02:38,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:38,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76387915] [2022-03-03 20:02:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:38,404 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 20:02:38,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:38,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76387915] [2022-03-03 20:02:38,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76387915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:02:38,412 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:02:38,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 20:02:38,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603748671] [2022-03-03 20:02:38,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:02:38,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 20:02:38,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 20:02:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 20:02:38,478 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:38,543 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-03 20:02:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 20:02:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 20:02:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:38,555 INFO L225 Difference]: With dead ends: 217 [2022-03-03 20:02:38,555 INFO L226 Difference]: Without dead ends: 202 [2022-03-03 20:02:38,557 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 20:02:38,560 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:38,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:02:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-03 20:02:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-03 20:02:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-03 20:02:38,639 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-03 20:02:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:38,640 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-03 20:02:38,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-03 20:02:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 20:02:38,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:38,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:38,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 20:02:38,643 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-03-03 20:02:38,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:38,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928810000] [2022-03-03 20:02:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:02:38,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:38,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928810000] [2022-03-03 20:02:38,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928810000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:02:38,728 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:02:38,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:02:38,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867948148] [2022-03-03 20:02:38,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:02:38,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:02:38,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:02:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 20:02:38,730 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:38,803 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-03 20:02:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 20:02:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 20:02:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:38,806 INFO L225 Difference]: With dead ends: 158 [2022-03-03 20:02:38,806 INFO L226 Difference]: Without dead ends: 158 [2022-03-03 20:02:38,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:02:38,808 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:38,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:02:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-03 20:02:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-03 20:02:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-03 20:02:38,828 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-03 20:02:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:38,828 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-03 20:02:38,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-03 20:02:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 20:02:38,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:38,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:38,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 20:02:38,831 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-03-03 20:02:38,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:38,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692005129] [2022-03-03 20:02:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:02:38,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:38,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692005129] [2022-03-03 20:02:38,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692005129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:02:38,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:02:38,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:02:38,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181225276] [2022-03-03 20:02:38,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:02:38,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 20:02:38,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:38,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 20:02:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:02:38,884 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:38,941 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-03 20:02:38,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:02:38,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 20:02:38,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:38,944 INFO L225 Difference]: With dead ends: 183 [2022-03-03 20:02:38,944 INFO L226 Difference]: Without dead ends: 183 [2022-03-03 20:02:38,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:02:38,945 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:38,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:02:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-03 20:02:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-03 20:02:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-03 20:02:38,958 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-03 20:02:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:38,958 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-03 20:02:38,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-03 20:02:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:02:38,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:38,960 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 20:02:38,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 20:02:38,960 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:38,961 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-03-03 20:02:38,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:38,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632780648] [2022-03-03 20:02:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:38,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:39,349 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 20:02:39,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:39,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632780648] [2022-03-03 20:02:39,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632780648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:39,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601823004] [2022-03-03 20:02:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:39,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:39,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:39,356 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 20:02:39,358 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 20:02:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:39,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 20:02:39,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:39,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-03-03 20:02:40,002 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 20:02:40,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:40,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:40,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-03 20:02:40,412 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 20:02:40,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601823004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:40,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:40,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:02:40,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299738642] [2022-03-03 20:02:40,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:40,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:02:40,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:40,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:02:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:02:40,414 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:40,759 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-03 20:02:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:02:40,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:02:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:40,762 INFO L225 Difference]: With dead ends: 366 [2022-03-03 20:02:40,762 INFO L226 Difference]: Without dead ends: 351 [2022-03-03 20:02:40,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:02:40,764 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 197 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:40,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 61 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:02:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-03 20:02:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-03 20:02:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-03 20:02:40,786 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-03 20:02:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:40,787 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-03 20:02:40,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-03 20:02:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:02:40,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:40,788 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 20:02:40,814 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 20:02:40,989 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 20:02:40,989 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-03-03 20:02:40,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:40,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511435066] [2022-03-03 20:02:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:40,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:41,193 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 20:02:41,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:41,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511435066] [2022-03-03 20:02:41,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511435066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:41,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010130209] [2022-03-03 20:02:41,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:02:41,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:41,195 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 20:02:41,200 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 20:02:41,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:02:41,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:41,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 20:02:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:41,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:41,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-03-03 20:02:41,883 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 20:02:41,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:42,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:42,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-03 20:02:42,240 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 20:02:42,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010130209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:42,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:42,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-03-03 20:02:42,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244184958] [2022-03-03 20:02:42,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:42,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:02:42,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:02:42,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:02:42,245 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:43,251 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-03-03 20:02:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:02:43,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:02:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:43,255 INFO L225 Difference]: With dead ends: 478 [2022-03-03 20:02:43,255 INFO L226 Difference]: Without dead ends: 463 [2022-03-03 20:02:43,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:02:43,256 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 281 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:43,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 128 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:02:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-03 20:02:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-03-03 20:02:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-03 20:02:43,268 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-03 20:02:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:43,269 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-03 20:02:43,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-03 20:02:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:02:43,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:43,270 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 20:02:43,295 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 20:02:43,492 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 20:02:43,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:43,493 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-03-03 20:02:43,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:43,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839559165] [2022-03-03 20:02:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:43,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:43,662 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 20:02:43,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:43,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839559165] [2022-03-03 20:02:43,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839559165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:43,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751144211] [2022-03-03 20:02:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:02:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:43,665 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 20:02:43,696 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 20:02:43,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:02:43,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:43,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:02:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:43,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-03-03 20:02:43,941 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 20:02:43,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:43,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:43,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-03 20:02:44,143 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 20:02:44,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751144211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:44,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:44,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 20:02:44,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880003864] [2022-03-03 20:02:44,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:44,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:02:44,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:02:44,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:02:44,156 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:44,559 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-03-03 20:02:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:02:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:02:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:44,562 INFO L225 Difference]: With dead ends: 418 [2022-03-03 20:02:44,562 INFO L226 Difference]: Without dead ends: 403 [2022-03-03 20:02:44,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:02:44,563 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:44,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 122 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:02:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-03 20:02:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-03-03 20:02:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-03 20:02:44,573 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-03 20:02:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:44,573 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-03 20:02:44,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-03 20:02:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:02:44,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:44,575 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 20:02:44,595 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 20:02:44,791 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 20:02:44,792 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-03-03 20:02:44,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:44,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145628822] [2022-03-03 20:02:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:44,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:44,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:44,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145628822] [2022-03-03 20:02:44,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145628822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:44,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41496004] [2022-03-03 20:02:44,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:02:44,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:44,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:44,957 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 20:02:44,985 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 20:02:44,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:02:44,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:44,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 20:02:44,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:45,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:45,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-03-03 20:02:45,450 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 20:02:45,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:45,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:45,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-03 20:02:45,691 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 20:02:45,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41496004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:45,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:45,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 20:02:45,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580045149] [2022-03-03 20:02:45,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:45,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:02:45,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:02:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:02:45,693 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:46,014 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-03-03 20:02:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:02:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:02:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:46,017 INFO L225 Difference]: With dead ends: 381 [2022-03-03 20:02:46,017 INFO L226 Difference]: Without dead ends: 366 [2022-03-03 20:02:46,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:02:46,018 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:46,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 135 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 318 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-03-03 20:02:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-03 20:02:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-03-03 20:02:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-03-03 20:02:46,026 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-03-03 20:02:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:46,026 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-03-03 20:02:46,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-03-03 20:02:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:02:46,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:46,028 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 20:02:46,053 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 20:02:46,251 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 20:02:46,251 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:46,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-03-03 20:02:46,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:46,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517764696] [2022-03-03 20:02:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:46,417 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 20:02:46,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:46,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517764696] [2022-03-03 20:02:46,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517764696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:46,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728728411] [2022-03-03 20:02:46,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:02:46,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:46,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:46,422 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 20:02:46,423 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 20:02:46,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:02:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 20:02:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:46,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:46,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-03-03 20:02:46,863 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 20:02:46,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:46,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:46,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-03 20:02:47,127 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 20:02:47,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728728411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:47,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:47,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 20:02:47,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441282398] [2022-03-03 20:02:47,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:47,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:02:47,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:47,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:02:47,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:02:47,128 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:48,198 INFO L93 Difference]: Finished difference Result 672 states and 1913 transitions. [2022-03-03 20:02:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 20:02:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:02:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:48,203 INFO L225 Difference]: With dead ends: 672 [2022-03-03 20:02:48,203 INFO L226 Difference]: Without dead ends: 657 [2022-03-03 20:02:48,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 20:02:48,204 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 247 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:48,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 135 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:02:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-03 20:02:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 253. [2022-03-03 20:02:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9404761904761907) internal successors, (741), 252 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 741 transitions. [2022-03-03 20:02:48,215 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 741 transitions. Word has length 22 [2022-03-03 20:02:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:48,215 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 741 transitions. [2022-03-03 20:02:48,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 741 transitions. [2022-03-03 20:02:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:02:48,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:48,216 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 20:02:48,243 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 20:02:48,440 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 20:02:48,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:48,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:48,441 INFO L85 PathProgramCache]: Analyzing trace with hash 70299084, now seen corresponding path program 6 times [2022-03-03 20:02:48,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:48,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369815764] [2022-03-03 20:02:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:48,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:48,592 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 20:02:48,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:48,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369815764] [2022-03-03 20:02:48,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369815764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:48,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256717506] [2022-03-03 20:02:48,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:02:48,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:48,594 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 20:02:48,620 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 20:02:48,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:02:48,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:48,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 20:02:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:48,840 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 46 treesize of output 34 [2022-03-03 20:02:48,934 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 20:02:48,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:49,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:49,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-03 20:02:49,160 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 20:02:49,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256717506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:49,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:49,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-03 20:02:49,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995084130] [2022-03-03 20:02:49,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:49,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:02:49,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:02:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:02:49,162 INFO L87 Difference]: Start difference. First operand 253 states and 741 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:49,931 INFO L93 Difference]: Finished difference Result 471 states and 1359 transitions. [2022-03-03 20:02:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:02:49,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:02:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:49,935 INFO L225 Difference]: With dead ends: 471 [2022-03-03 20:02:49,935 INFO L226 Difference]: Without dead ends: 456 [2022-03-03 20:02:49,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:02:49,939 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:49,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 161 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:02:49,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-03-03 20:02:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 247. [2022-03-03 20:02:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-03-03 20:02:49,948 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-03-03 20:02:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-03-03 20:02:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-03-03 20:02:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:49,950 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:49,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:49,974 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 20:02:50,161 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 20:02:50,161 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:50,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-03-03 20:02:50,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:50,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636665565] [2022-03-03 20:02:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:50,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:50,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:50,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636665565] [2022-03-03 20:02:50,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636665565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:50,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478642819] [2022-03-03 20:02:50,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:02:50,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:50,218 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 20:02:50,219 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 20:02:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:02:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:50,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:50,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478642819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:50,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:50,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 20:02:50,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703138282] [2022-03-03 20:02:50,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:50,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:02:50,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:02:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:02:50,448 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:51,368 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-03-03 20:02:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:02:51,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:02:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:51,374 INFO L225 Difference]: With dead ends: 1099 [2022-03-03 20:02:51,375 INFO L226 Difference]: Without dead ends: 1099 [2022-03-03 20:02:51,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 20:02:51,376 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 274 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:51,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 211 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:02:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-03 20:02:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-03-03 20:02:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:51,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-03-03 20:02:51,391 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-03-03 20:02:51,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:51,392 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-03-03 20:02:51,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-03-03 20:02:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:51,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:51,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:51,422 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 20:02:51,607 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 20:02:51,607 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:51,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-03-03 20:02:51,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:51,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077807139] [2022-03-03 20:02:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:51,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:51,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:51,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077807139] [2022-03-03 20:02:51,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077807139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:51,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116244528] [2022-03-03 20:02:51,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:02:51,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:51,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:51,672 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 20:02:51,679 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 20:02:51,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:02:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:02:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:51,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116244528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:51,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:51,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:02:51,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382489819] [2022-03-03 20:02:51,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:51,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:02:51,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:02:51,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:02:51,944 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:53,849 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-03-03 20:02:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 20:02:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:02:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:53,860 INFO L225 Difference]: With dead ends: 1794 [2022-03-03 20:02:53,860 INFO L226 Difference]: Without dead ends: 1794 [2022-03-03 20:02:53,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 20:02:53,864 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 487 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:53,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 286 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:02:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-03-03 20:02:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-03-03 20:02:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-03 20:02:53,888 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-03 20:02:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:53,889 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-03 20:02:53,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-03 20:02:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:53,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:53,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:53,917 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 20:02:54,107 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 20:02:54,108 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:54,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:54,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-03-03 20:02:54,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:54,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277936896] [2022-03-03 20:02:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:54,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:54,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:54,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277936896] [2022-03-03 20:02:54,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277936896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:54,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15803965] [2022-03-03 20:02:54,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:02:54,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:54,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:54,178 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 20:02:54,179 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 20:02:54,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:02:54,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:02:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:54,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:54,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15803965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:54,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:54,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:02:54,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283910437] [2022-03-03 20:02:54,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:54,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:02:54,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:02:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:02:54,439 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:55,366 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-03 20:02:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:02:55,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:02:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:55,373 INFO L225 Difference]: With dead ends: 1470 [2022-03-03 20:02:55,373 INFO L226 Difference]: Without dead ends: 1470 [2022-03-03 20:02:55,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 20:02:55,375 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 430 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:55,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 249 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:02:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-03 20:02:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-03 20:02:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-03 20:02:55,393 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-03 20:02:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:55,394 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-03 20:02:55,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-03 20:02:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:55,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:55,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:55,421 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 20:02:55,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:55,611 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-03-03 20:02:55,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:55,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666982300] [2022-03-03 20:02:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:02:55,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:55,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666982300] [2022-03-03 20:02:55,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666982300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:55,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167276756] [2022-03-03 20:02:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:55,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:55,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:55,658 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 20:02:55,689 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 20:02:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:02:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:02:55,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:02:55,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167276756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:55,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:55,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 20:02:55,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949334380] [2022-03-03 20:02:55,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:55,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:02:55,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:02:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:02:55,837 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:55,999 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-03 20:02:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:02:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:02:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:56,012 INFO L225 Difference]: With dead ends: 685 [2022-03-03 20:02:56,012 INFO L226 Difference]: Without dead ends: 679 [2022-03-03 20:02:56,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:02:56,013 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 170 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:56,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 38 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:02:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-03 20:02:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-03 20:02:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-03 20:02:56,026 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-03 20:02:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:56,026 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-03 20:02:56,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-03 20:02:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:56,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:56,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:56,058 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 20:02:56,247 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 20:02:56,247 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-03-03 20:02:56,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:56,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953109311] [2022-03-03 20:02:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:56,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:56,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953109311] [2022-03-03 20:02:56,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953109311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:56,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878117351] [2022-03-03 20:02:56,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:02:56,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:56,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:56,297 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 20:02:56,298 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 20:02:56,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:02:56,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:56,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:02:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:56,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:56,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878117351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:56,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:56,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 20:02:56,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107724459] [2022-03-03 20:02:56,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:56,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:02:56,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:02:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:02:56,486 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:56,874 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-03 20:02:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 20:02:56,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:02:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:56,880 INFO L225 Difference]: With dead ends: 1159 [2022-03-03 20:02:56,880 INFO L226 Difference]: Without dead ends: 1111 [2022-03-03 20:02:56,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:02:56,881 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 233 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:56,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 124 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:02:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-03 20:02:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-03 20:02:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-03 20:02:56,902 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-03 20:02:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:56,902 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-03 20:02:56,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-03 20:02:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:56,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:56,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:56,932 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 20:02:57,121 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 20:02:57,122 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-03-03 20:02:57,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:57,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088146328] [2022-03-03 20:02:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:57,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:02:57,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:57,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088146328] [2022-03-03 20:02:57,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088146328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:57,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119667393] [2022-03-03 20:02:57,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:02:57,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:57,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:57,160 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 20:02:57,195 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 20:02:57,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:02:57,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:57,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:02:57,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:02:57,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:02:57,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119667393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:57,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:57,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 20:02:57,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26853813] [2022-03-03 20:02:57,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:57,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:02:57,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:57,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:02:57,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:02:57,386 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:57,590 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-03 20:02:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:02:57,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:02:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:57,595 INFO L225 Difference]: With dead ends: 1267 [2022-03-03 20:02:57,596 INFO L226 Difference]: Without dead ends: 1267 [2022-03-03 20:02:57,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:02:57,596 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 202 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:57,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 68 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:02:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-03 20:02:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-03 20:02:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-03 20:02:57,619 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-03 20:02:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:57,619 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-03 20:02:57,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-03 20:02:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:57,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:57,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:57,642 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 20:02:57,835 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 20:02:57,835 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-03-03 20:02:57,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:57,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93561522] [2022-03-03 20:02:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:57,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:57,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:57,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93561522] [2022-03-03 20:02:57,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93561522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:57,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566329663] [2022-03-03 20:02:57,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:02:57,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:57,893 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 20:02:57,921 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 20:02:57,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:02:57,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:57,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:02:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:58,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:58,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566329663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:58,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:58,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:02:58,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491734492] [2022-03-03 20:02:58,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:58,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:02:58,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:02:58,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:02:58,111 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:58,680 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-03 20:02:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:02:58,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:02:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:58,691 INFO L225 Difference]: With dead ends: 2268 [2022-03-03 20:02:58,691 INFO L226 Difference]: Without dead ends: 2268 [2022-03-03 20:02:58,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 20:02:58,692 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 254 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:58,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 168 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:02:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-03 20:02:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-03 20:02:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-03 20:02:58,726 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-03 20:02:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:58,726 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-03 20:02:58,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-03 20:02:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:58,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:58,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:58,755 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 20:02:58,951 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 20:02:58,952 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-03-03 20:02:58,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:58,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676956761] [2022-03-03 20:02:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:58,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:58,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:58,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676956761] [2022-03-03 20:02:58,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676956761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:58,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220144320] [2022-03-03 20:02:58,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:02:58,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:58,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:58,998 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 20:02:59,030 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 20:02:59,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:02:59,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:02:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:59,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:59,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220144320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:59,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:59,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:02:59,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475214887] [2022-03-03 20:02:59,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:59,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:02:59,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:02:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:02:59,188 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:59,857 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-03 20:02:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:02:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:02:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:59,868 INFO L225 Difference]: With dead ends: 2256 [2022-03-03 20:02:59,868 INFO L226 Difference]: Without dead ends: 2256 [2022-03-03 20:02:59,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:02:59,870 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 271 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:59,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 163 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:02:59,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-03 20:02:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-03 20:02:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-03 20:02:59,905 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-03 20:02:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:59,906 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-03 20:02:59,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-03 20:02:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:02:59,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:59,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:59,932 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 20:03:00,126 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 20:03:00,126 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-03-03 20:03:00,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:00,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939413363] [2022-03-03 20:03:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:00,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:00,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:00,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939413363] [2022-03-03 20:03:00,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939413363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:00,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990004492] [2022-03-03 20:03:00,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:00,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:00,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:00,166 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 20:03:00,167 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 20:03:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:00,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:00,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:00,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990004492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:00,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:00,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 20:03:00,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424619456] [2022-03-03 20:03:00,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:00,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:03:00,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:03:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:03:00,328 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:00,604 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-03 20:03:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 20:03:00,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:00,612 INFO L225 Difference]: With dead ends: 1611 [2022-03-03 20:03:00,613 INFO L226 Difference]: Without dead ends: 1611 [2022-03-03 20:03:00,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:03:00,614 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 227 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:00,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 110 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-03 20:03:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-03 20:03:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-03 20:03:00,653 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-03 20:03:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:00,653 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-03 20:03:00,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-03 20:03:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:00,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:00,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:00,683 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 20:03:00,880 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 20:03:00,881 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:00,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-03-03 20:03:00,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:00,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809642837] [2022-03-03 20:03:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:00,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:00,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:00,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809642837] [2022-03-03 20:03:00,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809642837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:00,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108025524] [2022-03-03 20:03:00,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:00,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:00,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:00,931 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 20:03:00,932 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 20:03:00,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:00,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:00,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:00,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:01,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:01,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108025524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:01,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:01,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:01,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020502329] [2022-03-03 20:03:01,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:01,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:01,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:01,121 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:01,663 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-03 20:03:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:03:01,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:01,671 INFO L225 Difference]: With dead ends: 2408 [2022-03-03 20:03:01,672 INFO L226 Difference]: Without dead ends: 2404 [2022-03-03 20:03:01,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:03:01,673 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 295 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:01,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 142 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-03 20:03:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-03 20:03:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-03 20:03:01,713 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-03 20:03:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:01,713 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-03 20:03:01,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-03 20:03:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:01,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:01,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:01,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-03 20:03:01,931 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 20:03:01,931 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-03-03 20:03:01,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:01,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816277166] [2022-03-03 20:03:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:01,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:01,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816277166] [2022-03-03 20:03:01,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816277166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:01,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140799294] [2022-03-03 20:03:01,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:01,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:01,978 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 20:03:02,008 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 20:03:02,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:03:02,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:02,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:02,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:02,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:02,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140799294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:02,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:02,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:02,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250428262] [2022-03-03 20:03:02,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:02,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:02,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:02,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:02,207 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:03,229 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-03 20:03:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 20:03:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:03,238 INFO L225 Difference]: With dead ends: 3509 [2022-03-03 20:03:03,239 INFO L226 Difference]: Without dead ends: 3509 [2022-03-03 20:03:03,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:03:03,240 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 526 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:03,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 260 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:03:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-03 20:03:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-03 20:03:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-03 20:03:03,293 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-03 20:03:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:03,293 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-03 20:03:03,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-03 20:03:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:03,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:03,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:03,312 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 20:03:03,496 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 20:03:03,497 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-03-03 20:03:03,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:03,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258491233] [2022-03-03 20:03:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:03,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:03,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258491233] [2022-03-03 20:03:03,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258491233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:03,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182997452] [2022-03-03 20:03:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:03,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:03,540 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 20:03:03,558 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 20:03:03,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:03,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:03,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:03,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:03,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182997452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:03,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:03,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:03,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622169958] [2022-03-03 20:03:03,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:03,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:03,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:03,782 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:05,167 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-03 20:03:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 20:03:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:05,177 INFO L225 Difference]: With dead ends: 3211 [2022-03-03 20:03:05,177 INFO L226 Difference]: Without dead ends: 3207 [2022-03-03 20:03:05,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 20:03:05,179 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 442 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:05,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 286 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:03:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-03 20:03:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-03 20:03:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-03 20:03:05,225 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-03 20:03:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:05,225 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-03 20:03:05,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-03 20:03:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:05,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:05,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:05,254 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 20:03:05,443 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 20:03:05,443 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-03-03 20:03:05,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:05,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400779169] [2022-03-03 20:03:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:05,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:05,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:05,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400779169] [2022-03-03 20:03:05,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400779169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:05,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061979883] [2022-03-03 20:03:05,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:05,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:05,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:05,480 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 20:03:05,482 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 20:03:05,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:03:05,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:03:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:05,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:05,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061979883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:05,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:05,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 20:03:05,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069343407] [2022-03-03 20:03:05,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:05,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 20:03:05,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:05,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 20:03:05,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-03 20:03:05,689 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:05,820 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-03 20:03:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:03:05,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:05,823 INFO L225 Difference]: With dead ends: 1333 [2022-03-03 20:03:05,823 INFO L226 Difference]: Without dead ends: 1333 [2022-03-03 20:03:05,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:05,824 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:05,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 51 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:05,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-03 20:03:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-03 20:03:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-03 20:03:05,846 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-03 20:03:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:05,846 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-03 20:03:05,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-03 20:03:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:05,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:05,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:05,875 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 20:03:06,075 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 20:03:06,075 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-03-03 20:03:06,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:06,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983845946] [2022-03-03 20:03:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:06,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:06,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:06,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983845946] [2022-03-03 20:03:06,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983845946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:06,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899047438] [2022-03-03 20:03:06,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:06,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:06,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:06,119 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 20:03:06,142 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 20:03:06,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:06,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:06,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:06,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899047438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:06,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:06,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 20:03:06,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506364004] [2022-03-03 20:03:06,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:06,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:03:06,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:03:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:03:06,285 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:06,677 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-03 20:03:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:03:06,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:06,684 INFO L225 Difference]: With dead ends: 2129 [2022-03-03 20:03:06,684 INFO L226 Difference]: Without dead ends: 2129 [2022-03-03 20:03:06,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:03:06,685 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:06,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 142 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-03 20:03:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-03 20:03:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-03 20:03:06,719 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-03 20:03:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:06,720 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-03 20:03:06,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-03 20:03:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:06,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:06,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:06,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:06,967 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 20:03:06,968 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-03-03 20:03:06,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:06,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784511762] [2022-03-03 20:03:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:06,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:07,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:07,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784511762] [2022-03-03 20:03:07,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784511762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:07,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836153468] [2022-03-03 20:03:07,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:07,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:07,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:07,015 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 20:03:07,043 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 20:03:07,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:03:07,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:07,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:07,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:07,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836153468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:07,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:07,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:03:07,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783974178] [2022-03-03 20:03:07,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:07,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:03:07,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:07,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:03:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:03:07,172 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:07,555 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-03 20:03:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:03:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:07,564 INFO L225 Difference]: With dead ends: 2262 [2022-03-03 20:03:07,564 INFO L226 Difference]: Without dead ends: 2262 [2022-03-03 20:03:07,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:03:07,566 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 189 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:07,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 129 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-03 20:03:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-03 20:03:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-03 20:03:07,605 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-03 20:03:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:07,605 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-03 20:03:07,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-03 20:03:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:07,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:07,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:07,633 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 20:03:07,823 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 20:03:07,823 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-03-03 20:03:07,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:07,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743428214] [2022-03-03 20:03:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:07,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:07,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743428214] [2022-03-03 20:03:07,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743428214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:07,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678410095] [2022-03-03 20:03:07,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:07,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:07,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:07,877 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 20:03:07,878 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 20:03:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:07,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:07,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:08,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:08,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678410095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:08,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:08,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 20:03:08,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012836098] [2022-03-03 20:03:08,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:08,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:03:08,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:03:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:08,077 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:08,391 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-03 20:03:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:03:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:08,396 INFO L225 Difference]: With dead ends: 1474 [2022-03-03 20:03:08,396 INFO L226 Difference]: Without dead ends: 1464 [2022-03-03 20:03:08,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:03:08,397 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:08,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 154 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-03 20:03:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-03 20:03:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-03 20:03:08,424 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-03 20:03:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:08,424 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-03 20:03:08,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-03 20:03:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:08,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:08,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:08,453 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 20:03:08,646 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 20:03:08,647 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:08,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-03-03 20:03:08,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:08,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525354498] [2022-03-03 20:03:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:08,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:08,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525354498] [2022-03-03 20:03:08,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525354498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:08,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363395001] [2022-03-03 20:03:08,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:08,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:08,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:08,690 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 20:03:08,692 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 20:03:08,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:08,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:08,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:08,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:08,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363395001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:08,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:08,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:03:08,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570403672] [2022-03-03 20:03:08,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:08,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:03:08,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:03:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:03:08,866 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:09,147 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-03 20:03:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 20:03:09,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:09,152 INFO L225 Difference]: With dead ends: 2318 [2022-03-03 20:03:09,152 INFO L226 Difference]: Without dead ends: 2314 [2022-03-03 20:03:09,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:03:09,153 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 193 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:09,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 107 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-03 20:03:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-03 20:03:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-03 20:03:09,187 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-03 20:03:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:09,187 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-03 20:03:09,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-03 20:03:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:09,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:09,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:09,217 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 20:03:09,413 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 20:03:09,413 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-03-03 20:03:09,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:09,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491198658] [2022-03-03 20:03:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:09,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:09,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:09,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491198658] [2022-03-03 20:03:09,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491198658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:09,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915446619] [2022-03-03 20:03:09,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:09,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:09,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:09,488 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 20:03:09,493 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 20:03:09,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:03:09,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:09,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:09,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:09,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915446619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:09,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:09,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 20:03:09,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040237448] [2022-03-03 20:03:09,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:09,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:03:09,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:03:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:03:09,624 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:09,981 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-03 20:03:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 20:03:09,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:09,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:09,986 INFO L225 Difference]: With dead ends: 2302 [2022-03-03 20:03:09,986 INFO L226 Difference]: Without dead ends: 2290 [2022-03-03 20:03:09,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:03:09,987 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:09,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 148 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-03 20:03:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-03 20:03:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-03 20:03:10,019 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-03 20:03:10,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:10,019 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-03 20:03:10,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:10,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-03 20:03:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:10,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:10,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:10,045 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 20:03:10,235 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 20:03:10,235 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:10,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-03-03 20:03:10,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:10,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455523542] [2022-03-03 20:03:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:10,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:10,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:10,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455523542] [2022-03-03 20:03:10,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455523542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:10,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330092956] [2022-03-03 20:03:10,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:10,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:10,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:10,286 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 20:03:10,313 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 20:03:10,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:10,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:10,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:10,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:10,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330092956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:10,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:10,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:10,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714448394] [2022-03-03 20:03:10,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:10,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:10,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:10,519 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:11,421 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-03 20:03:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:03:11,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:11,434 INFO L225 Difference]: With dead ends: 4760 [2022-03-03 20:03:11,434 INFO L226 Difference]: Without dead ends: 4760 [2022-03-03 20:03:11,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:03:11,436 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 475 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:11,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 197 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-03 20:03:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-03 20:03:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-03 20:03:11,546 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-03 20:03:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:11,547 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-03 20:03:11,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:11,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-03 20:03:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:11,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:11,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:11,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-03 20:03:11,763 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 20:03:11,763 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:11,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-03-03 20:03:11,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:11,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10241556] [2022-03-03 20:03:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:11,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:11,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:11,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10241556] [2022-03-03 20:03:11,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10241556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:11,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409281057] [2022-03-03 20:03:11,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:11,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:11,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:11,810 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 20:03:11,811 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 20:03:11,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:11,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:11,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:12,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409281057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:12,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:12,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:12,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546036848] [2022-03-03 20:03:12,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:12,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:12,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:12,026 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:12,815 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-03 20:03:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:03:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:12,825 INFO L225 Difference]: With dead ends: 4260 [2022-03-03 20:03:12,825 INFO L226 Difference]: Without dead ends: 4260 [2022-03-03 20:03:12,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 20:03:12,827 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 370 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:12,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 200 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-03 20:03:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-03 20:03:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-03 20:03:12,886 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-03 20:03:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:12,887 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-03 20:03:12,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-03 20:03:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:12,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:12,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:12,914 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 20:03:13,103 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 20:03:13,103 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-03-03 20:03:13,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:13,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543515533] [2022-03-03 20:03:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:13,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:13,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:13,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543515533] [2022-03-03 20:03:13,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543515533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:13,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621880066] [2022-03-03 20:03:13,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:13,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:13,147 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 20:03:13,148 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 20:03:13,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:03:13,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:13,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:13,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:13,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621880066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:13,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:13,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 20:03:13,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273538349] [2022-03-03 20:03:13,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:13,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:03:13,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:03:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:03:13,321 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:14,058 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-03 20:03:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 20:03:14,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:14,070 INFO L225 Difference]: With dead ends: 4602 [2022-03-03 20:03:14,070 INFO L226 Difference]: Without dead ends: 4602 [2022-03-03 20:03:14,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:03:14,073 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 327 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:14,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 198 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-03 20:03:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-03 20:03:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-03 20:03:14,134 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-03 20:03:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:14,135 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-03 20:03:14,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-03 20:03:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:14,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:14,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:14,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-03 20:03:14,351 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 20:03:14,351 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-03-03 20:03:14,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:14,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223825693] [2022-03-03 20:03:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:14,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:14,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223825693] [2022-03-03 20:03:14,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223825693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:14,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564721888] [2022-03-03 20:03:14,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:14,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:14,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:14,396 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 20:03:14,397 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 20:03:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:14,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:14,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:14,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564721888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:14,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:14,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 20:03:14,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320377495] [2022-03-03 20:03:14,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:14,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:03:14,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:03:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:03:14,564 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:15,145 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-03 20:03:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:03:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:15,153 INFO L225 Difference]: With dead ends: 4348 [2022-03-03 20:03:15,154 INFO L226 Difference]: Without dead ends: 4344 [2022-03-03 20:03:15,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:03:15,154 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 359 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:15,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 172 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-03 20:03:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-03 20:03:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 20:03:15,206 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 20:03:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:15,206 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 20:03:15,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 20:03:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:15,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:15,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:15,231 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 20:03:15,423 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 20:03:15,423 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-03-03 20:03:15,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:15,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769536204] [2022-03-03 20:03:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:15,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:15,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769536204] [2022-03-03 20:03:15,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769536204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:15,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46410576] [2022-03-03 20:03:15,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:15,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:15,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:15,469 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 20:03:15,493 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 20:03:15,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:15,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:15,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:15,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:15,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:15,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46410576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:15,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:15,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:15,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558639543] [2022-03-03 20:03:15,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:15,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:15,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:15,682 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:16,312 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-03 20:03:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:03:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:16,321 INFO L225 Difference]: With dead ends: 4035 [2022-03-03 20:03:16,321 INFO L226 Difference]: Without dead ends: 4035 [2022-03-03 20:03:16,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 20:03:16,322 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 518 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:16,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 208 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-03 20:03:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-03 20:03:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-03 20:03:16,375 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-03 20:03:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:16,375 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-03 20:03:16,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-03 20:03:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:16,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:16,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:16,404 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 20:03:16,591 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 20:03:16,591 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-03-03 20:03:16,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:16,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478554600] [2022-03-03 20:03:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:16,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:16,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478554600] [2022-03-03 20:03:16,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478554600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:16,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601316953] [2022-03-03 20:03:16,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:16,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:16,636 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 20:03:16,637 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 20:03:16,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:03:16,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:16,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:16,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:16,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:16,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601316953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:16,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:16,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:16,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043676585] [2022-03-03 20:03:16,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:16,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:16,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:16,843 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:17,631 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-03 20:03:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:03:17,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:17,641 INFO L225 Difference]: With dead ends: 3794 [2022-03-03 20:03:17,641 INFO L226 Difference]: Without dead ends: 3790 [2022-03-03 20:03:17,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:03:17,642 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 407 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:17,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 188 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-03 20:03:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-03 20:03:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 20:03:17,690 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 20:03:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:17,691 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 20:03:17,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 20:03:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:17,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:17,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:17,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 20:03:17,893 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 20:03:17,894 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:17,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:17,894 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-03-03 20:03:17,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:17,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745119961] [2022-03-03 20:03:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:17,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:17,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:17,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745119961] [2022-03-03 20:03:17,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745119961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:17,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775133399] [2022-03-03 20:03:17,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:17,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:17,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:17,939 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 20:03:17,940 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 20:03:17,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:17,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:17,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:18,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:18,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775133399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:18,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:18,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:18,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711810319] [2022-03-03 20:03:18,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:18,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:18,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:18,099 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:18,775 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-03 20:03:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:03:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:18,783 INFO L225 Difference]: With dead ends: 3978 [2022-03-03 20:03:18,783 INFO L226 Difference]: Without dead ends: 3978 [2022-03-03 20:03:18,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 20:03:18,784 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 252 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:18,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 164 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-03 20:03:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-03 20:03:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-03 20:03:18,825 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-03 20:03:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:18,825 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-03 20:03:18,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-03 20:03:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:18,829 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:18,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:18,853 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 20:03:19,052 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 20:03:19,053 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:19,053 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-03-03 20:03:19,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:19,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794564040] [2022-03-03 20:03:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:19,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:19,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:19,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794564040] [2022-03-03 20:03:19,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794564040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:19,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097518506] [2022-03-03 20:03:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:19,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:19,107 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 20:03:19,134 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 20:03:19,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:19,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:19,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:19,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:19,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097518506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:19,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:19,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:19,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656114619] [2022-03-03 20:03:19,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:19,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:19,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:19,295 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:19,815 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-03 20:03:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:03:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:19,822 INFO L225 Difference]: With dead ends: 3706 [2022-03-03 20:03:19,822 INFO L226 Difference]: Without dead ends: 3702 [2022-03-03 20:03:19,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:03:19,822 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 324 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:19,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 119 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:19,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-03 20:03:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-03 20:03:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-03 20:03:19,861 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-03 20:03:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:19,861 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-03 20:03:19,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-03 20:03:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:19,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:19,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:19,891 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 20:03:20,087 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 20:03:20,088 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-03-03 20:03:20,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:20,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400413311] [2022-03-03 20:03:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:20,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:20,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400413311] [2022-03-03 20:03:20,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400413311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:20,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600522791] [2022-03-03 20:03:20,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:20,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:20,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:20,135 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 20:03:20,135 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 20:03:20,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:03:20,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:20,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:20,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:20,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600522791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:20,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:20,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:20,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837935142] [2022-03-03 20:03:20,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:20,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:20,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:20,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:20,287 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:20,867 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-03 20:03:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:03:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:20,873 INFO L225 Difference]: With dead ends: 4114 [2022-03-03 20:03:20,874 INFO L226 Difference]: Without dead ends: 4102 [2022-03-03 20:03:20,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:03:20,874 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 240 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:20,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 195 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-03 20:03:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-03 20:03:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-03 20:03:20,913 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-03 20:03:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:20,914 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-03 20:03:20,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-03 20:03:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:20,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:20,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:20,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 20:03:21,117 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 20:03:21,117 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-03-03 20:03:21,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:21,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704370095] [2022-03-03 20:03:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:21,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:21,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:21,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704370095] [2022-03-03 20:03:21,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704370095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:21,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064600035] [2022-03-03 20:03:21,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:21,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:21,166 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 20:03:21,167 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 20:03:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:21,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:21,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:21,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064600035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:21,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:21,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:21,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107518334] [2022-03-03 20:03:21,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:21,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:21,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:21,366 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:22,032 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-03 20:03:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:03:22,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:22,039 INFO L225 Difference]: With dead ends: 3694 [2022-03-03 20:03:22,039 INFO L226 Difference]: Without dead ends: 3694 [2022-03-03 20:03:22,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:03:22,040 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 377 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:22,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 283 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-03 20:03:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-03 20:03:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-03 20:03:22,083 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-03 20:03:22,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:22,083 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-03 20:03:22,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:22,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-03 20:03:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:22,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:22,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:22,113 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 20:03:22,303 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 20:03:22,303 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-03-03 20:03:22,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:22,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20925179] [2022-03-03 20:03:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:22,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:22,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:22,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20925179] [2022-03-03 20:03:22,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20925179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:22,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926670512] [2022-03-03 20:03:22,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:22,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:22,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:22,349 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 20:03:22,373 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 20:03:22,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:22,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:22,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:22,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926670512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:22,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:22,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:22,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932242397] [2022-03-03 20:03:22,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:22,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:22,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:22,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:22,549 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:23,357 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-03 20:03:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:03:23,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:23,364 INFO L225 Difference]: With dead ends: 3420 [2022-03-03 20:03:23,364 INFO L226 Difference]: Without dead ends: 3416 [2022-03-03 20:03:23,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:03:23,365 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 359 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:23,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 194 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-03 20:03:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-03 20:03:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-03 20:03:23,421 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-03 20:03:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:23,421 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-03 20:03:23,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-03 20:03:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:23,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:23,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:23,441 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 20:03:23,625 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 20:03:23,625 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:23,626 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-03-03 20:03:23,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:23,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793468542] [2022-03-03 20:03:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:23,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:23,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:23,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793468542] [2022-03-03 20:03:23,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793468542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:23,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009017191] [2022-03-03 20:03:23,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:23,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:23,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:23,678 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 20:03:23,680 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 20:03:23,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:03:23,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:23,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:23,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:23,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:23,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009017191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:23,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:23,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 20:03:23,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141986080] [2022-03-03 20:03:23,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:23,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:03:23,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:03:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:23,880 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:24,533 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-03 20:03:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:03:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:24,539 INFO L225 Difference]: With dead ends: 3256 [2022-03-03 20:03:24,539 INFO L226 Difference]: Without dead ends: 3244 [2022-03-03 20:03:24,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:03:24,540 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 251 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:24,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 209 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-03 20:03:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-03 20:03:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-03 20:03:24,576 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-03 20:03:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:24,576 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-03 20:03:24,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-03 20:03:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:24,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:24,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:24,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 20:03:24,779 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 20:03:24,780 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-03-03 20:03:24,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:24,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010347316] [2022-03-03 20:03:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:25,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:25,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010347316] [2022-03-03 20:03:25,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010347316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:25,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132268801] [2022-03-03 20:03:25,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:25,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:25,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:25,277 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 20:03:25,277 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 20:03:25,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:25,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:25,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:03:25,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:25,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:25,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:03:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:26,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:26,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:26,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:26,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:03:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:27,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132268801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:27,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:27,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:03:27,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066768466] [2022-03-03 20:03:27,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:27,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:03:27,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:03:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:03:27,823 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:32,135 INFO L93 Difference]: Finished difference Result 4082 states and 13028 transitions. [2022-03-03 20:03:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:03:32,135 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:03:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:32,142 INFO L225 Difference]: With dead ends: 4082 [2022-03-03 20:03:32,143 INFO L226 Difference]: Without dead ends: 4022 [2022-03-03 20:03:32,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=906, Invalid=3650, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:03:32,143 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 607 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:32,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 322 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:03:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2022-03-03 20:03:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 1792. [2022-03-03 20:03:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-03-03 20:03:32,198 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-03-03 20:03:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:32,198 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-03-03 20:03:32,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-03-03 20:03:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:32,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:32,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:32,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-03 20:03:32,403 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 20:03:32,403 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-03-03 20:03:32,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:32,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270167771] [2022-03-03 20:03:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:32,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:32,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:32,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270167771] [2022-03-03 20:03:32,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270167771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:32,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889154901] [2022-03-03 20:03:32,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:32,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:32,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:32,752 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:03:32,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 20:03:32,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:32,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:32,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:03:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:33,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:33,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:33,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:03:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:33,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:33,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:34,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:34,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:03:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:35,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889154901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:35,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:35,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:03:35,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51157043] [2022-03-03 20:03:35,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:35,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:03:35,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:03:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:03:35,261 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:39,784 INFO L93 Difference]: Finished difference Result 4155 states and 13266 transitions. [2022-03-03 20:03:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:03:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:03:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:39,791 INFO L225 Difference]: With dead ends: 4155 [2022-03-03 20:03:39,791 INFO L226 Difference]: Without dead ends: 4125 [2022-03-03 20:03:39,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 20:03:39,792 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 555 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:39,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 351 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1322 Invalid, 0 Unknown, 71 Unchecked, 0.9s Time] [2022-03-03 20:03:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2022-03-03 20:03:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 1818. [2022-03-03 20:03:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.5833791964777104) internal successors, (6511), 1817 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6511 transitions. [2022-03-03 20:03:39,830 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6511 transitions. Word has length 26 [2022-03-03 20:03:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:39,830 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6511 transitions. [2022-03-03 20:03:39,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6511 transitions. [2022-03-03 20:03:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:39,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:39,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:39,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-03 20:03:40,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-03 20:03:40,034 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-03-03 20:03:40,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:40,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845926634] [2022-03-03 20:03:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:40,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:40,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845926634] [2022-03-03 20:03:40,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845926634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:40,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506520829] [2022-03-03 20:03:40,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:40,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:40,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:40,458 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:03:40,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 20:03:40,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:40,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:40,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:03:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:41,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:41,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:41,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:41,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:03:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:41,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:41,771 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:03:41,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:03:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:42,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506520829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:42,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:42,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:03:42,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991539799] [2022-03-03 20:03:42,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:42,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:03:42,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:42,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:03:42,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:03:42,361 INFO L87 Difference]: Start difference. First operand 1818 states and 6511 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:48,386 INFO L93 Difference]: Finished difference Result 3781 states and 12664 transitions. [2022-03-03 20:03:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 20:03:48,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:03:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:48,393 INFO L225 Difference]: With dead ends: 3781 [2022-03-03 20:03:48,393 INFO L226 Difference]: Without dead ends: 3751 [2022-03-03 20:03:48,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1171, Invalid=7019, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 20:03:48,394 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 375 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:48,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 322 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1683 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:03:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-03-03 20:03:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 1891. [2022-03-03 20:03:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 3.5783068783068783) internal successors, (6763), 1890 states have internal predecessors, (6763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 6763 transitions. [2022-03-03 20:03:48,442 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 6763 transitions. Word has length 26 [2022-03-03 20:03:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:48,443 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 6763 transitions. [2022-03-03 20:03:48,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 6763 transitions. [2022-03-03 20:03:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:03:48,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:48,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:48,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:48,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-03 20:03:48,659 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 6 times [2022-03-03 20:03:48,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:48,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013001973] [2022-03-03 20:03:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:48,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:49,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:49,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013001973] [2022-03-03 20:03:49,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013001973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:49,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795034611] [2022-03-03 20:03:49,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:49,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:49,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:49,160 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:03:49,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 20:03:49,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:03:49,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:49,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:03:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:49,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:03:49,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:49,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:03:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:50,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:50,665 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:03:50,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:03:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:51,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795034611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:51,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:51,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:03:51,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515993024] [2022-03-03 20:03:51,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:51,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:03:51,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:03:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:03:51,788 INFO L87 Difference]: Start difference. First operand 1891 states and 6763 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:00,316 INFO L93 Difference]: Finished difference Result 4670 states and 14888 transitions. [2022-03-03 20:04:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 20:04:00,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:00,325 INFO L225 Difference]: With dead ends: 4670 [2022-03-03 20:04:00,325 INFO L226 Difference]: Without dead ends: 4610 [2022-03-03 20:04:00,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1236, Invalid=7884, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 20:04:00,326 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 503 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 3308 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:00,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 711 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3308 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 20:04:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2022-03-03 20:04:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 1942. [2022-03-03 20:04:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.573415765069552) internal successors, (6936), 1941 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6936 transitions. [2022-03-03 20:04:00,373 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6936 transitions. Word has length 26 [2022-03-03 20:04:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:00,374 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6936 transitions. [2022-03-03 20:04:00,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6936 transitions. [2022-03-03 20:04:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:00,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:00,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:00,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 20:04:00,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-03 20:04:00,578 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:00,579 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-03-03 20:04:00,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:00,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149063111] [2022-03-03 20:04:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:00,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:01,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:01,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149063111] [2022-03-03 20:04:01,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149063111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:01,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191439837] [2022-03-03 20:04:01,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:01,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:01,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:01,049 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:01,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 20:04:01,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:04:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:01,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:01,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:01,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:04:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:01,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:02,291 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:04:02,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:04:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:02,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191439837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:02,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:02,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:04:02,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610155730] [2022-03-03 20:04:02,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:02,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:04:02,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:04:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:04:02,951 INFO L87 Difference]: Start difference. First operand 1942 states and 6936 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:11,626 INFO L93 Difference]: Finished difference Result 4808 states and 15717 transitions. [2022-03-03 20:04:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-03 20:04:11,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:11,635 INFO L225 Difference]: With dead ends: 4808 [2022-03-03 20:04:11,635 INFO L226 Difference]: Without dead ends: 4746 [2022-03-03 20:04:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2152, Invalid=11420, Unknown=0, NotChecked=0, Total=13572 [2022-03-03 20:04:11,636 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 485 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 624 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 20:04:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2022-03-03 20:04:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 1983. [2022-03-03 20:04:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.5736629667003026) internal successors, (7083), 1982 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 7083 transitions. [2022-03-03 20:04:11,699 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 7083 transitions. Word has length 26 [2022-03-03 20:04:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:11,699 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 7083 transitions. [2022-03-03 20:04:11,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 7083 transitions. [2022-03-03 20:04:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:11,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:11,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:11,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:11,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:11,916 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-03-03 20:04:11,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:11,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9104384] [2022-03-03 20:04:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:12,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:12,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9104384] [2022-03-03 20:04:12,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9104384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:12,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406721501] [2022-03-03 20:04:12,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:04:12,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:12,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:12,228 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:12,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 20:04:12,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:04:12,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:12,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:04:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:12,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:12,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:12,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:12,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:12,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:04:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:12,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:13,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:13,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:13,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:13,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-03-03 20:04:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:13,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406721501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:13,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:13,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 20:04:13,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364741822] [2022-03-03 20:04:13,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:13,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:04:13,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:04:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:04:13,780 INFO L87 Difference]: Start difference. First operand 1983 states and 7083 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:21,497 INFO L93 Difference]: Finished difference Result 5095 states and 16333 transitions. [2022-03-03 20:04:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 20:04:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:21,506 INFO L225 Difference]: With dead ends: 5095 [2022-03-03 20:04:21,506 INFO L226 Difference]: Without dead ends: 5050 [2022-03-03 20:04:21,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1396, Invalid=7160, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 20:04:21,507 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 687 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:21,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 553 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:04:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2022-03-03 20:04:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 2249. [2022-03-03 20:04:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 3.538256227758007) internal successors, (7954), 2248 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 7954 transitions. [2022-03-03 20:04:21,560 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 7954 transitions. Word has length 26 [2022-03-03 20:04:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:21,560 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 7954 transitions. [2022-03-03 20:04:21,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 7954 transitions. [2022-03-03 20:04:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:21,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:21,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:21,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:21,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:21,765 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 296771640, now seen corresponding path program 7 times [2022-03-03 20:04:21,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:21,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592054106] [2022-03-03 20:04:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:22,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:22,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592054106] [2022-03-03 20:04:22,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592054106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:22,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312459659] [2022-03-03 20:04:22,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:04:22,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:22,152 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:22,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 20:04:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:22,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:04:22,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:22,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:22,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:22,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:04:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:22,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:23,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:23,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:04:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:24,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312459659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:24,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:24,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:04:24,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258618064] [2022-03-03 20:04:24,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:24,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:04:24,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:24,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:04:24,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:04:24,815 INFO L87 Difference]: Start difference. First operand 2249 states and 7954 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:29,065 INFO L93 Difference]: Finished difference Result 4792 states and 15350 transitions. [2022-03-03 20:04:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:04:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:29,074 INFO L225 Difference]: With dead ends: 4792 [2022-03-03 20:04:29,074 INFO L226 Difference]: Without dead ends: 4747 [2022-03-03 20:04:29,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=912, Invalid=3644, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:04:29,074 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 551 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:29,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 342 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:04:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-03-03 20:04:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 2277. [2022-03-03 20:04:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 3.5342706502636205) internal successors, (8044), 2276 states have internal predecessors, (8044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 8044 transitions. [2022-03-03 20:04:29,131 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 8044 transitions. Word has length 26 [2022-03-03 20:04:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:29,131 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 8044 transitions. [2022-03-03 20:04:29,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 8044 transitions. [2022-03-03 20:04:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:29,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:29,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:29,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-03 20:04:29,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-03 20:04:29,335 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:29,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 8 times [2022-03-03 20:04:29,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:29,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052946679] [2022-03-03 20:04:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:29,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:29,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052946679] [2022-03-03 20:04:29,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052946679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:29,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004995002] [2022-03-03 20:04:29,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:04:29,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:29,717 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:29,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 20:04:29,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:04:29,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:04:29,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:30,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:30,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:30,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 109 [2022-03-03 20:04:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:30,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:31,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:31,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:31,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:31,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-03 20:04:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:32,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004995002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:32,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:32,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:04:32,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050288657] [2022-03-03 20:04:32,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:32,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:04:32,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:04:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:04:32,237 INFO L87 Difference]: Start difference. First operand 2277 states and 8044 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:43,693 INFO L93 Difference]: Finished difference Result 5580 states and 17964 transitions. [2022-03-03 20:04:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-03 20:04:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:43,702 INFO L225 Difference]: With dead ends: 5580 [2022-03-03 20:04:43,702 INFO L226 Difference]: Without dead ends: 5535 [2022-03-03 20:04:43,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5077 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2249, Invalid=11557, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 20:04:43,703 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 702 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:43,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 839 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2380 Invalid, 0 Unknown, 577 Unchecked, 1.4s Time] [2022-03-03 20:04:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2022-03-03 20:04:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 2346. [2022-03-03 20:04:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 3.537313432835821) internal successors, (8295), 2345 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 8295 transitions. [2022-03-03 20:04:43,758 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 8295 transitions. Word has length 26 [2022-03-03 20:04:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:43,758 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 8295 transitions. [2022-03-03 20:04:43,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 8295 transitions. [2022-03-03 20:04:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:43,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:43,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:43,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 20:04:43,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 20:04:43,975 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1377789112, now seen corresponding path program 9 times [2022-03-03 20:04:43,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:43,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673901247] [2022-03-03 20:04:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:43,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:44,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:44,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673901247] [2022-03-03 20:04:44,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673901247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:44,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960995993] [2022-03-03 20:04:44,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:04:44,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:44,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:44,465 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:44,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 20:04:44,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:04:44,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:44,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:04:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:45,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:45,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:45,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:04:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:45,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:45,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:45,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:45,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:04:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:46,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960995993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:46,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:46,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:04:46,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024293698] [2022-03-03 20:04:46,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:46,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:46,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:46,914 INFO L87 Difference]: Start difference. First operand 2346 states and 8295 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:51,649 INFO L93 Difference]: Finished difference Result 4913 states and 15799 transitions. [2022-03-03 20:04:51,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:04:51,650 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:04:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:51,658 INFO L225 Difference]: With dead ends: 4913 [2022-03-03 20:04:51,658 INFO L226 Difference]: Without dead ends: 4891 [2022-03-03 20:04:51,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=963, Invalid=4149, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:04:51,659 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 451 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:51,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 421 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1654 Invalid, 0 Unknown, 55 Unchecked, 1.0s Time] [2022-03-03 20:04:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2022-03-03 20:04:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 2334. [2022-03-03 20:04:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.5452207458208314) internal successors, (8271), 2333 states have internal predecessors, (8271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 8271 transitions. [2022-03-03 20:04:51,707 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 8271 transitions. Word has length 26 [2022-03-03 20:04:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:51,707 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 8271 transitions. [2022-03-03 20:04:51,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 8271 transitions. [2022-03-03 20:04:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:51,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:51,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:51,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 20:04:51,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-03 20:04:51,912 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -116118610, now seen corresponding path program 10 times [2022-03-03 20:04:51,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:51,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285706413] [2022-03-03 20:04:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:52,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:52,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285706413] [2022-03-03 20:04:52,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285706413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:52,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833092919] [2022-03-03 20:04:52,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:04:52,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:52,510 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:52,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 20:04:52,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:04:52,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:52,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:04:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:53,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:53,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:04:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:54,033 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:04:54,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:04:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:55,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833092919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:55,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:55,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:04:55,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338599192] [2022-03-03 20:04:55,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:55,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:55,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:55,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:55,259 INFO L87 Difference]: Start difference. First operand 2334 states and 8271 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:02,232 INFO L93 Difference]: Finished difference Result 4804 states and 15568 transitions. [2022-03-03 20:05:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 20:05:02,232 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:05:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:02,241 INFO L225 Difference]: With dead ends: 4804 [2022-03-03 20:05:02,241 INFO L226 Difference]: Without dead ends: 4767 [2022-03-03 20:05:02,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2309 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1007, Invalid=6475, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 20:05:02,242 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 379 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:02,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 492 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:05:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2022-03-03 20:05:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 2321. [2022-03-03 20:05:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 3.548706896551724) internal successors, (8233), 2320 states have internal predecessors, (8233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 8233 transitions. [2022-03-03 20:05:02,302 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 8233 transitions. Word has length 26 [2022-03-03 20:05:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:02,302 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 8233 transitions. [2022-03-03 20:05:02,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 8233 transitions. [2022-03-03 20:05:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:02,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:02,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:02,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 20:05:02,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:02,507 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:02,507 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 11 times [2022-03-03 20:05:02,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:02,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154426447] [2022-03-03 20:05:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:02,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:02,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:02,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154426447] [2022-03-03 20:05:02,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154426447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:02,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968860242] [2022-03-03 20:05:02,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:05:02,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:02,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:02,784 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:02,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 20:05:02,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:05:02,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:02,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:05:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:03,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:03,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:03,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:03,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 83 [2022-03-03 20:05:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:03,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:04,190 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:05:04,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:05:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:05,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968860242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:05,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:05,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:05:05,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560292177] [2022-03-03 20:05:05,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:05,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:05:05,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:05:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:05:05,513 INFO L87 Difference]: Start difference. First operand 2321 states and 8233 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:13,908 INFO L93 Difference]: Finished difference Result 5403 states and 17456 transitions. [2022-03-03 20:05:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 20:05:13,908 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:05:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:13,917 INFO L225 Difference]: With dead ends: 5403 [2022-03-03 20:05:13,917 INFO L226 Difference]: Without dead ends: 5316 [2022-03-03 20:05:13,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1663, Invalid=10547, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 20:05:13,918 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 545 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:13,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 566 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 20:05:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-03-03 20:05:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2361. [2022-03-03 20:05:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 3.548305084745763) internal successors, (8374), 2360 states have internal predecessors, (8374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 8374 transitions. [2022-03-03 20:05:13,971 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 8374 transitions. Word has length 26 [2022-03-03 20:05:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:13,971 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 8374 transitions. [2022-03-03 20:05:13,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:13,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 8374 transitions. [2022-03-03 20:05:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:13,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:13,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:13,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 20:05:14,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 20:05:14,176 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash 338936652, now seen corresponding path program 37 times [2022-03-03 20:05:14,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:14,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457145010] [2022-03-03 20:05:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:14,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:14,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457145010] [2022-03-03 20:05:14,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457145010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:14,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184802979] [2022-03-03 20:05:14,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:05:14,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:14,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:14,471 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:14,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 20:05:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:05:14,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:15,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:15,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:15,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:15,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:15,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:05:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:15,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:15,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:15,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:15,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:15,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:15,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-03-03 20:05:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:16,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184802979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:16,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:16,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 20:05:16,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444417956] [2022-03-03 20:05:16,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:16,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:05:16,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:05:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:05:16,041 INFO L87 Difference]: Start difference. First operand 2361 states and 8374 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:23,663 INFO L93 Difference]: Finished difference Result 6053 states and 19484 transitions. [2022-03-03 20:05:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 20:05:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:05:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:23,674 INFO L225 Difference]: With dead ends: 6053 [2022-03-03 20:05:23,674 INFO L226 Difference]: Without dead ends: 5972 [2022-03-03 20:05:23,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1822, Invalid=8278, Unknown=0, NotChecked=0, Total=10100 [2022-03-03 20:05:23,675 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 600 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:23,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 534 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:05:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2022-03-03 20:05:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 2450. [2022-03-03 20:05:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2449 states have (on average 3.5728868926092283) internal successors, (8750), 2449 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:23,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 8750 transitions. [2022-03-03 20:05:23,737 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 8750 transitions. Word has length 26 [2022-03-03 20:05:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:23,737 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 8750 transitions. [2022-03-03 20:05:23,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:23,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 8750 transitions. [2022-03-03 20:05:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:23,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:23,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:23,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-03 20:05:23,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:23,943 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:23,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1541249020, now seen corresponding path program 38 times [2022-03-03 20:05:23,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:23,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399290943] [2022-03-03 20:05:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:23,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:24,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:24,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399290943] [2022-03-03 20:05:24,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399290943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:24,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565901018] [2022-03-03 20:05:24,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:05:24,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:24,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:24,241 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:24,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 20:05:24,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:05:24,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:24,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:05:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:24,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:24,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 115 [2022-03-03 20:05:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:26,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:27,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:27,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:27,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:27,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-03 20:05:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:28,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565901018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:28,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:28,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-03-03 20:05:28,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391203720] [2022-03-03 20:05:28,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:28,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 20:05:28,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 20:05:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-03-03 20:05:28,256 INFO L87 Difference]: Start difference. First operand 2450 states and 8750 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:51,602 INFO L93 Difference]: Finished difference Result 10188 states and 33160 transitions. [2022-03-03 20:05:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-03-03 20:05:51,602 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:05:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:51,620 INFO L225 Difference]: With dead ends: 10188 [2022-03-03 20:05:51,621 INFO L226 Difference]: Without dead ends: 10102 [2022-03-03 20:05:51,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28138 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=8934, Invalid=54318, Unknown=0, NotChecked=0, Total=63252 [2022-03-03 20:05:51,623 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1054 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 6178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3382 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:51,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1039 Invalid, 6178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2633 Invalid, 0 Unknown, 3382 Unchecked, 1.7s Time] [2022-03-03 20:05:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10102 states. [2022-03-03 20:05:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10102 to 2531. [2022-03-03 20:05:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 3.6039525691699605) internal successors, (9118), 2530 states have internal predecessors, (9118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 9118 transitions. [2022-03-03 20:05:51,722 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 9118 transitions. Word has length 26 [2022-03-03 20:05:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:51,722 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 9118 transitions. [2022-03-03 20:05:51,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 9118 transitions. [2022-03-03 20:05:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:51,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:51,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:51,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 20:05:51,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-03 20:05:51,928 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash -353117544, now seen corresponding path program 39 times [2022-03-03 20:05:51,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:51,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753091503] [2022-03-03 20:05:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:52,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:52,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753091503] [2022-03-03 20:05:52,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753091503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:52,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214164260] [2022-03-03 20:05:52,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:05:52,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:52,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:52,220 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:52,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 20:05:52,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:05:52,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:05:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:52,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:52,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-03-03 20:05:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:53,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:54,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:54,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:54,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 86 [2022-03-03 20:05:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:54,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214164260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:54,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:54,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-03-03 20:05:54,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650361236] [2022-03-03 20:05:54,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:54,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 20:05:54,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:54,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 20:05:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 20:05:54,455 INFO L87 Difference]: Start difference. First operand 2531 states and 9118 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:25,906 INFO L93 Difference]: Finished difference Result 9106 states and 28908 transitions. [2022-03-03 20:06:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-03-03 20:06:25,907 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:06:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:25,922 INFO L225 Difference]: With dead ends: 9106 [2022-03-03 20:06:25,922 INFO L226 Difference]: Without dead ends: 9039 [2022-03-03 20:06:25,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23351 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=11129, Invalid=41083, Unknown=0, NotChecked=0, Total=52212 [2022-03-03 20:06:25,924 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1250 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 4476 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 4476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:25,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 1133 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 4476 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-03 20:06:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2022-03-03 20:06:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 2626. [2022-03-03 20:06:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 3.6365714285714286) internal successors, (9546), 2625 states have internal predecessors, (9546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 9546 transitions. [2022-03-03 20:06:26,001 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 9546 transitions. Word has length 26 [2022-03-03 20:06:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:26,001 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 9546 transitions. [2022-03-03 20:06:26,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 9546 transitions. [2022-03-03 20:06:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:26,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:26,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:26,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-03 20:06:26,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-03 20:06:26,206 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1122519044, now seen corresponding path program 12 times [2022-03-03 20:06:26,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:26,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859715613] [2022-03-03 20:06:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:26,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:26,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:26,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859715613] [2022-03-03 20:06:26,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859715613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:26,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153286369] [2022-03-03 20:06:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:06:26,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:26,563 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:26,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 20:06:26,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:06:26,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:06:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:27,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:27,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:06:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:27,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:27,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:27,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:27,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:06:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:30,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153286369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:30,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:30,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:06:30,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360453209] [2022-03-03 20:06:30,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:30,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:06:30,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:06:30,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:06:30,300 INFO L87 Difference]: Start difference. First operand 2626 states and 9546 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:33,464 INFO L93 Difference]: Finished difference Result 4913 states and 16279 transitions. [2022-03-03 20:06:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:06:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:06:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:33,473 INFO L225 Difference]: With dead ends: 4913 [2022-03-03 20:06:33,473 INFO L226 Difference]: Without dead ends: 4835 [2022-03-03 20:06:33,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=664, Invalid=3242, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 20:06:33,473 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 394 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:33,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 344 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:06:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-03-03 20:06:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 2703. [2022-03-03 20:06:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 3.626943005181347) internal successors, (9800), 2702 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 9800 transitions. [2022-03-03 20:06:33,520 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 9800 transitions. Word has length 26 [2022-03-03 20:06:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:33,520 INFO L470 AbstractCegarLoop]: Abstraction has 2703 states and 9800 transitions. [2022-03-03 20:06:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 9800 transitions. [2022-03-03 20:06:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:33,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:33,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:33,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-03 20:06:33,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:33,725 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:33,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:33,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1990419930, now seen corresponding path program 13 times [2022-03-03 20:06:33,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:33,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807852845] [2022-03-03 20:06:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:34,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:34,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807852845] [2022-03-03 20:06:34,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807852845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:34,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707133333] [2022-03-03 20:06:34,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:06:34,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:34,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:34,148 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:34,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 20:06:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:06:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:34,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:34,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:06:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:34,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:35,600 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:06:35,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:06:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:37,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707133333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:37,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:37,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:06:37,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062818421] [2022-03-03 20:06:37,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:37,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:06:37,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:06:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:06:37,361 INFO L87 Difference]: Start difference. First operand 2703 states and 9800 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:42,612 INFO L93 Difference]: Finished difference Result 5160 states and 17193 transitions. [2022-03-03 20:06:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 20:06:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:06:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:42,621 INFO L225 Difference]: With dead ends: 5160 [2022-03-03 20:06:42,621 INFO L226 Difference]: Without dead ends: 5115 [2022-03-03 20:06:42,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=838, Invalid=5482, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 20:06:42,622 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 331 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:42,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 451 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:06:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2022-03-03 20:06:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 2687. [2022-03-03 20:06:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 3.632911392405063) internal successors, (9758), 2686 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 9758 transitions. [2022-03-03 20:06:42,676 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 9758 transitions. Word has length 26 [2022-03-03 20:06:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:42,676 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 9758 transitions. [2022-03-03 20:06:42,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 9758 transitions. [2022-03-03 20:06:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:42,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:42,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:42,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 20:06:42,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 20:06:42,884 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1451678616, now seen corresponding path program 14 times [2022-03-03 20:06:42,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:42,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860553440] [2022-03-03 20:06:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:43,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:43,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860553440] [2022-03-03 20:06:43,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860553440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:43,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456403987] [2022-03-03 20:06:43,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:06:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:43,159 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:43,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 20:06:43,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:06:43,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:43,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:06:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:43,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:43,981 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 109 treesize of output 99 [2022-03-03 20:06:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:44,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:45,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:45,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-03-03 20:06:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:47,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456403987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:47,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:47,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-03-03 20:06:47,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118442553] [2022-03-03 20:06:47,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:47,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:06:47,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:47,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:06:47,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:06:47,850 INFO L87 Difference]: Start difference. First operand 2687 states and 9758 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:49,633 INFO L93 Difference]: Finished difference Result 5325 states and 19041 transitions. [2022-03-03 20:06:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 20:06:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:06:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:49,643 INFO L225 Difference]: With dead ends: 5325 [2022-03-03 20:06:49,644 INFO L226 Difference]: Without dead ends: 5310 [2022-03-03 20:06:49,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:06:49,645 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 366 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:49,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 282 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 733 Invalid, 0 Unknown, 711 Unchecked, 0.4s Time] [2022-03-03 20:06:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2022-03-03 20:06:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 2699. [2022-03-03 20:06:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 3.6345441067457376) internal successors, (9806), 2698 states have internal predecessors, (9806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 9806 transitions. [2022-03-03 20:06:49,702 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 9806 transitions. Word has length 26 [2022-03-03 20:06:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:49,702 INFO L470 AbstractCegarLoop]: Abstraction has 2699 states and 9806 transitions. [2022-03-03 20:06:49,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 9806 transitions. [2022-03-03 20:06:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:49,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:49,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:49,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-03 20:06:49,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-03 20:06:49,907 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1057572634, now seen corresponding path program 15 times [2022-03-03 20:06:49,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:49,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926978115] [2022-03-03 20:06:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:50,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:50,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926978115] [2022-03-03 20:06:50,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926978115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:50,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131503460] [2022-03-03 20:06:50,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:06:50,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:50,180 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:50,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 20:06:50,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:06:50,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:06:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:50,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:50,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:50,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:06:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:51,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:51,700 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:06:51,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:06:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:52,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131503460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:52,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:52,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:06:52,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134745660] [2022-03-03 20:06:52,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:52,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:06:52,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:06:52,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:06:52,682 INFO L87 Difference]: Start difference. First operand 2699 states and 9806 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:00,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:00,156 INFO L93 Difference]: Finished difference Result 6053 states and 20100 transitions. [2022-03-03 20:07:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 20:07:00,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:00,168 INFO L225 Difference]: With dead ends: 6053 [2022-03-03 20:07:00,168 INFO L226 Difference]: Without dead ends: 6002 [2022-03-03 20:07:00,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3202 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1377, Invalid=8325, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 20:07:00,169 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 432 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:00,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 512 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:07:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2022-03-03 20:07:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 2697. [2022-03-03 20:07:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2696 states have (on average 3.6353857566765577) internal successors, (9801), 2696 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 9801 transitions. [2022-03-03 20:07:00,230 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 9801 transitions. Word has length 26 [2022-03-03 20:07:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:00,231 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 9801 transitions. [2022-03-03 20:07:00,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 9801 transitions. [2022-03-03 20:07:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:00,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:00,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:00,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-03 20:07:00,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:00,435 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 16 times [2022-03-03 20:07:00,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:00,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474380705] [2022-03-03 20:07:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:00,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:00,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:00,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474380705] [2022-03-03 20:07:00,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474380705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:00,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540224057] [2022-03-03 20:07:00,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:07:00,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:00,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:00,653 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:00,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 20:07:00,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:07:00,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:00,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:07:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:01,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:01,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:01,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:07:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:01,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:01,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:01,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:01,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 161 [2022-03-03 20:07:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:03,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540224057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:03,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:03,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:07:03,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170500381] [2022-03-03 20:07:03,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:03,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:07:03,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:03,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:07:03,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:07:03,421 INFO L87 Difference]: Start difference. First operand 2697 states and 9801 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:07,247 INFO L93 Difference]: Finished difference Result 5180 states and 17050 transitions. [2022-03-03 20:07:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:07:07,251 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:07,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:07,261 INFO L225 Difference]: With dead ends: 5180 [2022-03-03 20:07:07,261 INFO L226 Difference]: Without dead ends: 5052 [2022-03-03 20:07:07,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=658, Invalid=3002, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:07:07,262 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 312 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:07,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 394 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:07:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2022-03-03 20:07:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 2791. [2022-03-03 20:07:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.6236559139784945) internal successors, (10110), 2790 states have internal predecessors, (10110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10110 transitions. [2022-03-03 20:07:07,330 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10110 transitions. Word has length 26 [2022-03-03 20:07:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:07,330 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 10110 transitions. [2022-03-03 20:07:07,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10110 transitions. [2022-03-03 20:07:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:07,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:07,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:07,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:07,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:07,535 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 17 times [2022-03-03 20:07:07,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:07,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428446193] [2022-03-03 20:07:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:07,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:07,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:07,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428446193] [2022-03-03 20:07:07,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428446193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:07,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067805158] [2022-03-03 20:07:07,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:07:07,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:07,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:07,768 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:07,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 20:07:07,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:07:07,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:07,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:07:07,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:08,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:08,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:07:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:08,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:09,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:09,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:09,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 161 [2022-03-03 20:07:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:10,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067805158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:10,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:10,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:07:10,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389645428] [2022-03-03 20:07:10,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:10,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:07:10,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:07:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:07:10,899 INFO L87 Difference]: Start difference. First operand 2791 states and 10110 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:25,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:25,411 INFO L93 Difference]: Finished difference Result 7464 states and 23779 transitions. [2022-03-03 20:07:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 20:07:25,412 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:25,425 INFO L225 Difference]: With dead ends: 7464 [2022-03-03 20:07:25,425 INFO L226 Difference]: Without dead ends: 7289 [2022-03-03 20:07:25,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5210 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2262, Invalid=12018, Unknown=0, NotChecked=0, Total=14280 [2022-03-03 20:07:25,426 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 575 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:25,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 629 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 20:07:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2022-03-03 20:07:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 2946. [2022-03-03 20:07:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 3.636672325976231) internal successors, (10710), 2945 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 10710 transitions. [2022-03-03 20:07:25,511 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 10710 transitions. Word has length 26 [2022-03-03 20:07:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:25,512 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 10710 transitions. [2022-03-03 20:07:25,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 10710 transitions. [2022-03-03 20:07:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:25,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:25,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:25,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-03 20:07:25,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:25,716 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 18 times [2022-03-03 20:07:25,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:25,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834083799] [2022-03-03 20:07:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:26,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:26,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834083799] [2022-03-03 20:07:26,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834083799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:26,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025627166] [2022-03-03 20:07:26,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:07:26,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:26,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:26,100 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:26,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 20:07:26,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:07:26,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:07:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:26,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:26,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:26,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:07:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:27,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:27,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:27,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 161 [2022-03-03 20:07:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:32,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025627166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:32,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:32,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-03 20:07:32,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454990678] [2022-03-03 20:07:32,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:32,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:07:32,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:07:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:07:32,100 INFO L87 Difference]: Start difference. First operand 2946 states and 10710 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:35,981 INFO L93 Difference]: Finished difference Result 5431 states and 18218 transitions. [2022-03-03 20:07:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 20:07:35,981 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:35,992 INFO L225 Difference]: With dead ends: 5431 [2022-03-03 20:07:35,992 INFO L226 Difference]: Without dead ends: 5340 [2022-03-03 20:07:35,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=767, Invalid=3925, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:07:35,993 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 387 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:35,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 417 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1404 Invalid, 0 Unknown, 174 Unchecked, 0.8s Time] [2022-03-03 20:07:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2022-03-03 20:07:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 2971. [2022-03-03 20:07:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 3.641077441077441) internal successors, (10814), 2970 states have internal predecessors, (10814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 10814 transitions. [2022-03-03 20:07:36,053 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 10814 transitions. Word has length 26 [2022-03-03 20:07:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:36,054 INFO L470 AbstractCegarLoop]: Abstraction has 2971 states and 10814 transitions. [2022-03-03 20:07:36,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 10814 transitions. [2022-03-03 20:07:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:36,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:36,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:36,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-03 20:07:36,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-03 20:07:36,258 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash 237410036, now seen corresponding path program 19 times [2022-03-03 20:07:36,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:36,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681662018] [2022-03-03 20:07:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:36,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:36,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:36,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681662018] [2022-03-03 20:07:36,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681662018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:36,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57120127] [2022-03-03 20:07:36,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:07:36,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:36,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:36,519 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:36,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 20:07:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:36,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:07:36,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:37,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:37,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:37,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:07:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:37,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:37,714 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:07:37,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 157 [2022-03-03 20:07:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:39,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57120127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:39,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:39,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 20:07:39,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518434931] [2022-03-03 20:07:39,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:39,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:07:39,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:07:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:07:39,456 INFO L87 Difference]: Start difference. First operand 2971 states and 10814 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:41,624 INFO L93 Difference]: Finished difference Result 4946 states and 16708 transitions. [2022-03-03 20:07:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 20:07:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:41,633 INFO L225 Difference]: With dead ends: 4946 [2022-03-03 20:07:41,633 INFO L226 Difference]: Without dead ends: 4916 [2022-03-03 20:07:41,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:07:41,634 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 194 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:41,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 262 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 865 Invalid, 0 Unknown, 299 Unchecked, 0.5s Time] [2022-03-03 20:07:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2022-03-03 20:07:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 2980. [2022-03-03 20:07:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 3.6411547499160792) internal successors, (10847), 2979 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 10847 transitions. [2022-03-03 20:07:41,686 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 10847 transitions. Word has length 26 [2022-03-03 20:07:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:41,687 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 10847 transitions. [2022-03-03 20:07:41,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 10847 transitions. [2022-03-03 20:07:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:41,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:41,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:41,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-03 20:07:41,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-03 20:07:41,891 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:41,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:41,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1355581052, now seen corresponding path program 20 times [2022-03-03 20:07:41,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:41,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908272597] [2022-03-03 20:07:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:41,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:42,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:42,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908272597] [2022-03-03 20:07:42,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908272597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:42,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056542764] [2022-03-03 20:07:42,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:07:42,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:42,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:42,114 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:42,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 20:07:42,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:07:42,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:42,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:07:42,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:42,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:42,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:42,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 85 [2022-03-03 20:07:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:42,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:43,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:43,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:43,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 161 [2022-03-03 20:07:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:45,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056542764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:45,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:45,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:07:45,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192946169] [2022-03-03 20:07:45,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:45,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:07:45,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:07:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:07:45,004 INFO L87 Difference]: Start difference. First operand 2980 states and 10847 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:48,849 INFO L93 Difference]: Finished difference Result 5798 states and 19244 transitions. [2022-03-03 20:07:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:07:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:48,860 INFO L225 Difference]: With dead ends: 5798 [2022-03-03 20:07:48,860 INFO L226 Difference]: Without dead ends: 5705 [2022-03-03 20:07:48,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=805, Invalid=3485, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:07:48,861 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 338 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:48,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 351 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1228 Invalid, 0 Unknown, 37 Unchecked, 0.7s Time] [2022-03-03 20:07:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2022-03-03 20:07:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 2997. [2022-03-03 20:07:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 3.6398531375166887) internal successors, (10905), 2996 states have internal predecessors, (10905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 10905 transitions. [2022-03-03 20:07:48,920 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 10905 transitions. Word has length 26 [2022-03-03 20:07:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:48,920 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 10905 transitions. [2022-03-03 20:07:48,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 10905 transitions. [2022-03-03 20:07:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:48,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:48,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:48,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 20:07:49,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-03 20:07:49,125 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:49,125 INFO L85 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 21 times [2022-03-03 20:07:49,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:49,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99658279] [2022-03-03 20:07:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:49,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:49,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99658279] [2022-03-03 20:07:49,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99658279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:49,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055713630] [2022-03-03 20:07:49,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:07:49,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:49,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:49,492 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:49,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 20:07:49,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:07:49,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:49,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:07:49,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:50,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:50,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:07:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:50,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:50,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:50,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:50,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:07:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:52,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055713630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:52,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:52,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:07:52,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27634316] [2022-03-03 20:07:52,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:52,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:07:52,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:07:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:07:52,242 INFO L87 Difference]: Start difference. First operand 2997 states and 10905 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:55,427 INFO L93 Difference]: Finished difference Result 5382 states and 18047 transitions. [2022-03-03 20:07:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:07:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:07:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:55,455 INFO L225 Difference]: With dead ends: 5382 [2022-03-03 20:07:55,455 INFO L226 Difference]: Without dead ends: 5324 [2022-03-03 20:07:55,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=768, Invalid=3392, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 20:07:55,456 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 412 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:55,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 330 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 852 Invalid, 0 Unknown, 330 Unchecked, 0.5s Time] [2022-03-03 20:07:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2022-03-03 20:07:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 3055. [2022-03-03 20:07:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3055 states, 3054 states have (on average 3.6345776031434185) internal successors, (11100), 3054 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 11100 transitions. [2022-03-03 20:07:55,507 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 11100 transitions. Word has length 26 [2022-03-03 20:07:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:55,507 INFO L470 AbstractCegarLoop]: Abstraction has 3055 states and 11100 transitions. [2022-03-03 20:07:55,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 11100 transitions. [2022-03-03 20:07:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:55,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:55,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:55,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:55,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:55,712 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:55,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:55,713 INFO L85 PathProgramCache]: Analyzing trace with hash -697050812, now seen corresponding path program 22 times [2022-03-03 20:07:55,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:55,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187186157] [2022-03-03 20:07:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:55,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:55,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:55,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187186157] [2022-03-03 20:07:55,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187186157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:55,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846786725] [2022-03-03 20:07:55,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:07:55,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:55,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:56,000 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:56,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 20:07:56,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:07:56,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:56,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:07:56,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:56,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:56,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:56,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:07:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:56,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:57,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:57,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 161 [2022-03-03 20:07:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:58,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846786725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:58,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:58,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:07:58,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665659958] [2022-03-03 20:07:58,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:58,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:07:58,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:58,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:07:58,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:07:58,620 INFO L87 Difference]: Start difference. First operand 3055 states and 11100 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:02,712 INFO L93 Difference]: Finished difference Result 5939 states and 19853 transitions. [2022-03-03 20:08:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 20:08:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:02,723 INFO L225 Difference]: With dead ends: 5939 [2022-03-03 20:08:02,723 INFO L226 Difference]: Without dead ends: 5895 [2022-03-03 20:08:02,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=951, Invalid=3879, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 20:08:02,724 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 455 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:02,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 320 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 963 Invalid, 0 Unknown, 367 Unchecked, 0.6s Time] [2022-03-03 20:08:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-03-03 20:08:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 3081. [2022-03-03 20:08:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.639935064935065) internal successors, (11211), 3080 states have internal predecessors, (11211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 11211 transitions. [2022-03-03 20:08:02,807 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 11211 transitions. Word has length 26 [2022-03-03 20:08:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:02,808 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 11211 transitions. [2022-03-03 20:08:02,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 11211 transitions. [2022-03-03 20:08:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:02,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:02,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:02,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-03 20:08:03,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:03,027 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 23 times [2022-03-03 20:08:03,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:03,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906252401] [2022-03-03 20:08:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:03,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:03,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:03,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906252401] [2022-03-03 20:08:03,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906252401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:03,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111184973] [2022-03-03 20:08:03,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:08:03,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:03,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:03,288 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:03,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 20:08:03,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:08:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:08:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:03,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:03,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:08:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:04,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:04,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:04,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:04,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 203 treesize of output 165 [2022-03-03 20:08:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:06,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111184973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:06,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:06,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:08:06,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100194085] [2022-03-03 20:08:06,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:06,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:06,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:06,535 INFO L87 Difference]: Start difference. First operand 3081 states and 11211 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:12,519 INFO L93 Difference]: Finished difference Result 5840 states and 19590 transitions. [2022-03-03 20:08:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 20:08:12,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:12,530 INFO L225 Difference]: With dead ends: 5840 [2022-03-03 20:08:12,530 INFO L226 Difference]: Without dead ends: 5758 [2022-03-03 20:08:12,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1136, Invalid=5836, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 20:08:12,531 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 461 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:12,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 299 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1061 Invalid, 0 Unknown, 129 Unchecked, 0.7s Time] [2022-03-03 20:08:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2022-03-03 20:08:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 3146. [2022-03-03 20:08:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3145 states have (on average 3.638473767885533) internal successors, (11443), 3145 states have internal predecessors, (11443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 11443 transitions. [2022-03-03 20:08:12,595 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 11443 transitions. Word has length 26 [2022-03-03 20:08:12,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:12,595 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 11443 transitions. [2022-03-03 20:08:12,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 11443 transitions. [2022-03-03 20:08:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:12,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:12,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:12,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-03 20:08:12,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-03 20:08:12,800 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:12,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1440358446, now seen corresponding path program 24 times [2022-03-03 20:08:12,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:12,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244032116] [2022-03-03 20:08:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:12,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:13,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:13,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244032116] [2022-03-03 20:08:13,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244032116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:13,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879696000] [2022-03-03 20:08:13,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:08:13,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:13,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:13,131 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:13,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 20:08:13,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:08:13,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:13,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:13,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:13,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:08:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:13,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:14,603 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:08:14,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:08:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:16,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879696000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:16,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:16,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:08:16,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785396953] [2022-03-03 20:08:16,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:16,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:16,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:16,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:16,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:16,434 INFO L87 Difference]: Start difference. First operand 3146 states and 11443 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:21,614 INFO L93 Difference]: Finished difference Result 6413 states and 21358 transitions. [2022-03-03 20:08:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:08:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:21,626 INFO L225 Difference]: With dead ends: 6413 [2022-03-03 20:08:21,627 INFO L226 Difference]: Without dead ends: 6342 [2022-03-03 20:08:21,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1042, Invalid=5438, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 20:08:21,627 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 467 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:21,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 384 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:08:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-03-03 20:08:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 3169. [2022-03-03 20:08:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 3.63510101010101) internal successors, (11516), 3168 states have internal predecessors, (11516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 11516 transitions. [2022-03-03 20:08:21,699 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 11516 transitions. Word has length 26 [2022-03-03 20:08:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:21,699 INFO L470 AbstractCegarLoop]: Abstraction has 3169 states and 11516 transitions. [2022-03-03 20:08:21,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 11516 transitions. [2022-03-03 20:08:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:21,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:21,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:21,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:21,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-03 20:08:21,919 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:21,919 INFO L85 PathProgramCache]: Analyzing trace with hash 457853170, now seen corresponding path program 40 times [2022-03-03 20:08:21,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:21,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567221710] [2022-03-03 20:08:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:21,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:22,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:22,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567221710] [2022-03-03 20:08:22,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567221710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:22,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219672910] [2022-03-03 20:08:22,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:08:22,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:22,252 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:22,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 20:08:22,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:08:22,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:22,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:22,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:22,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:22,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:22,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:22,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:22,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:08:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:22,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:23,509 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:08:23,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-03-03 20:08:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:24,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219672910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:24,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:24,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:08:24,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215265810] [2022-03-03 20:08:24,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:24,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:24,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:24,022 INFO L87 Difference]: Start difference. First operand 3169 states and 11516 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:27,348 INFO L93 Difference]: Finished difference Result 5026 states and 17247 transitions. [2022-03-03 20:08:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:08:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:27,358 INFO L225 Difference]: With dead ends: 5026 [2022-03-03 20:08:27,358 INFO L226 Difference]: Without dead ends: 4925 [2022-03-03 20:08:27,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=705, Invalid=3987, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:08:27,358 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 315 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:27,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 311 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:08:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2022-03-03 20:08:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 3223. [2022-03-03 20:08:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 3222 states have (on average 3.6204220980757293) internal successors, (11665), 3222 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 11665 transitions. [2022-03-03 20:08:27,414 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 11665 transitions. Word has length 26 [2022-03-03 20:08:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:27,414 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 11665 transitions. [2022-03-03 20:08:27,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 11665 transitions. [2022-03-03 20:08:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:27,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:27,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:27,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 20:08:27,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:27,619 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 41 times [2022-03-03 20:08:27,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:27,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37290001] [2022-03-03 20:08:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:27,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:27,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37290001] [2022-03-03 20:08:27,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37290001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:27,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884231014] [2022-03-03 20:08:27,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:08:27,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:27,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:27,928 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:27,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 20:08:27,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:08:27,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:27,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:27,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:28,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:28,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:28,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:28,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:28,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-03-03 20:08:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:28,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:29,104 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:08:29,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:08:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:29,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884231014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:29,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:29,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:08:29,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546497076] [2022-03-03 20:08:29,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:29,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:29,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:29,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:29,726 INFO L87 Difference]: Start difference. First operand 3223 states and 11665 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:34,633 INFO L93 Difference]: Finished difference Result 5597 states and 19124 transitions. [2022-03-03 20:08:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 20:08:34,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:34,644 INFO L225 Difference]: With dead ends: 5597 [2022-03-03 20:08:34,644 INFO L226 Difference]: Without dead ends: 5553 [2022-03-03 20:08:34,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 20:08:34,645 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 299 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:34,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 578 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1983 Invalid, 0 Unknown, 186 Unchecked, 1.0s Time] [2022-03-03 20:08:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5553 states. [2022-03-03 20:08:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5553 to 3237. [2022-03-03 20:08:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 3.620519159456119) internal successors, (11716), 3236 states have internal predecessors, (11716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 11716 transitions. [2022-03-03 20:08:34,715 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 11716 transitions. Word has length 26 [2022-03-03 20:08:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:34,715 INFO L470 AbstractCegarLoop]: Abstraction has 3237 states and 11716 transitions. [2022-03-03 20:08:34,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 11716 transitions. [2022-03-03 20:08:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:34,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:34,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:34,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:34,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 20:08:34,943 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 25 times [2022-03-03 20:08:34,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:34,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108445598] [2022-03-03 20:08:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:35,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:35,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108445598] [2022-03-03 20:08:35,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108445598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:35,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379732383] [2022-03-03 20:08:35,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:08:35,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:35,295 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:35,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 20:08:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:35,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:35,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:08:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:36,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:36,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:36,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:36,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:08:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:37,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379732383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:37,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:37,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:08:37,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464637126] [2022-03-03 20:08:37,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:37,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:37,848 INFO L87 Difference]: Start difference. First operand 3237 states and 11716 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:42,234 INFO L93 Difference]: Finished difference Result 6941 states and 22699 transitions. [2022-03-03 20:08:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:08:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:42,248 INFO L225 Difference]: With dead ends: 6941 [2022-03-03 20:08:42,248 INFO L226 Difference]: Without dead ends: 6911 [2022-03-03 20:08:42,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1205, Invalid=4051, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 20:08:42,249 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 522 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:42,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 339 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1298 Invalid, 0 Unknown, 58 Unchecked, 0.8s Time] [2022-03-03 20:08:42,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2022-03-03 20:08:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 3338. [2022-03-03 20:08:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 3.6251123763859754) internal successors, (12097), 3337 states have internal predecessors, (12097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 12097 transitions. [2022-03-03 20:08:42,331 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 12097 transitions. Word has length 26 [2022-03-03 20:08:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:42,331 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 12097 transitions. [2022-03-03 20:08:42,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 12097 transitions. [2022-03-03 20:08:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:42,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:42,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:42,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:42,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-03 20:08:42,537 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:42,537 INFO L85 PathProgramCache]: Analyzing trace with hash 397567668, now seen corresponding path program 26 times [2022-03-03 20:08:42,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:42,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168413811] [2022-03-03 20:08:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:42,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:42,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:42,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168413811] [2022-03-03 20:08:42,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168413811] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:42,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270284250] [2022-03-03 20:08:42,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:08:42,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:42,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:42,901 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:42,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 20:08:42,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:08:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:43,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:43,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:08:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:44,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:45,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:45,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:45,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:45,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-03-03 20:08:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:45,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270284250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:45,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:45,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:08:45,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388991174] [2022-03-03 20:08:45,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:45,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:08:45,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:08:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:08:45,703 INFO L87 Difference]: Start difference. First operand 3338 states and 12097 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:57,034 INFO L93 Difference]: Finished difference Result 7210 states and 24172 transitions. [2022-03-03 20:08:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-03 20:08:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:57,048 INFO L225 Difference]: With dead ends: 7210 [2022-03-03 20:08:57,048 INFO L226 Difference]: Without dead ends: 7165 [2022-03-03 20:08:57,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5504 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2510, Invalid=11770, Unknown=0, NotChecked=0, Total=14280 [2022-03-03 20:08:57,049 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 775 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:57,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 646 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1589 Invalid, 0 Unknown, 727 Unchecked, 1.0s Time] [2022-03-03 20:08:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-03-03 20:08:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 3373. [2022-03-03 20:08:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3372 states have (on average 3.6370106761565837) internal successors, (12264), 3372 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 12264 transitions. [2022-03-03 20:08:57,143 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 12264 transitions. Word has length 26 [2022-03-03 20:08:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:57,143 INFO L470 AbstractCegarLoop]: Abstraction has 3373 states and 12264 transitions. [2022-03-03 20:08:57,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 12264 transitions. [2022-03-03 20:08:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:57,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:57,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:08:57,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-03 20:08:57,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-03 20:08:57,348 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1096340054, now seen corresponding path program 27 times [2022-03-03 20:08:57,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:57,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694029650] [2022-03-03 20:08:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:57,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:57,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:57,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694029650] [2022-03-03 20:08:57,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694029650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:57,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535179408] [2022-03-03 20:08:57,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:08:57,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:57,783 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:57,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 20:08:57,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:08:57,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:57,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:08:57,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:58,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:58,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:08:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:58,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:59,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:59,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:59,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:09:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:00,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535179408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:00,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:00,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:09:00,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642230496] [2022-03-03 20:09:00,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:00,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:00,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:00,581 INFO L87 Difference]: Start difference. First operand 3373 states and 12264 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:05,501 INFO L93 Difference]: Finished difference Result 7051 states and 23276 transitions. [2022-03-03 20:09:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:09:05,501 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:09:05,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:05,514 INFO L225 Difference]: With dead ends: 7051 [2022-03-03 20:09:05,514 INFO L226 Difference]: Without dead ends: 7044 [2022-03-03 20:09:05,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1146, Invalid=4110, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 20:09:05,515 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 506 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:05,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 364 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1477 Invalid, 0 Unknown, 62 Unchecked, 0.9s Time] [2022-03-03 20:09:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7044 states. [2022-03-03 20:09:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7044 to 3360. [2022-03-03 20:09:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.6394760345340877) internal successors, (12225), 3359 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 12225 transitions. [2022-03-03 20:09:05,589 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 12225 transitions. Word has length 26 [2022-03-03 20:09:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:05,589 INFO L470 AbstractCegarLoop]: Abstraction has 3360 states and 12225 transitions. [2022-03-03 20:09:05,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 12225 transitions. [2022-03-03 20:09:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:05,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:05,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:05,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:05,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-03 20:09:05,794 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:05,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1623096648, now seen corresponding path program 28 times [2022-03-03 20:09:05,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:05,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755824933] [2022-03-03 20:09:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:05,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:06,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:06,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755824933] [2022-03-03 20:09:06,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755824933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:06,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810759974] [2022-03-03 20:09:06,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:09:06,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:06,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:06,126 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:06,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 20:09:06,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:09:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:09:06,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:06,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:06,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:06,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:09:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:06,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:07,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:07,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:07,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:09:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:09,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810759974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:09,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:09,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:09:09,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147148463] [2022-03-03 20:09:09,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:09,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:09,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:09,122 INFO L87 Difference]: Start difference. First operand 3360 states and 12225 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:14,135 INFO L93 Difference]: Finished difference Result 6877 states and 22705 transitions. [2022-03-03 20:09:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:09:14,135 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:09:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:14,149 INFO L225 Difference]: With dead ends: 6877 [2022-03-03 20:09:14,149 INFO L226 Difference]: Without dead ends: 6847 [2022-03-03 20:09:14,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1249, Invalid=4603, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 20:09:14,150 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 438 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:14,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 455 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1346 Invalid, 0 Unknown, 241 Unchecked, 0.8s Time] [2022-03-03 20:09:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2022-03-03 20:09:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 3372. [2022-03-03 20:09:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 3.6407594185701573) internal successors, (12273), 3371 states have internal predecessors, (12273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 12273 transitions. [2022-03-03 20:09:14,223 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 12273 transitions. Word has length 26 [2022-03-03 20:09:14,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:14,224 INFO L470 AbstractCegarLoop]: Abstraction has 3372 states and 12273 transitions. [2022-03-03 20:09:14,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 12273 transitions. [2022-03-03 20:09:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:14,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:14,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:14,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:14,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:14,429 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash 5563868, now seen corresponding path program 29 times [2022-03-03 20:09:14,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:14,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646109523] [2022-03-03 20:09:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:14,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:14,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646109523] [2022-03-03 20:09:14,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646109523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:14,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895952375] [2022-03-03 20:09:14,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:09:14,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:14,764 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:14,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 20:09:14,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:09:14,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:15,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:15,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:09:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:15,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:16,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:16,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:16,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 181 [2022-03-03 20:09:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:18,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895952375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:18,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:18,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:09:18,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72389058] [2022-03-03 20:09:18,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:18,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:18,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:18,284 INFO L87 Difference]: Start difference. First operand 3372 states and 12273 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:28,744 INFO L93 Difference]: Finished difference Result 8010 states and 26236 transitions. [2022-03-03 20:09:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 20:09:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:09:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:28,759 INFO L225 Difference]: With dead ends: 8010 [2022-03-03 20:09:28,760 INFO L226 Difference]: Without dead ends: 7965 [2022-03-03 20:09:28,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2169, Invalid=9173, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 20:09:28,760 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 727 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1272 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:28,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 459 Invalid, 2439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1054 Invalid, 0 Unknown, 1272 Unchecked, 0.8s Time] [2022-03-03 20:09:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2022-03-03 20:09:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 3436. [2022-03-03 20:09:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 3.650655021834061) internal successors, (12540), 3435 states have internal predecessors, (12540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 12540 transitions. [2022-03-03 20:09:28,847 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 12540 transitions. Word has length 26 [2022-03-03 20:09:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:28,847 INFO L470 AbstractCegarLoop]: Abstraction has 3436 states and 12540 transitions. [2022-03-03 20:09:28,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 12540 transitions. [2022-03-03 20:09:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:28,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:28,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:28,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:29,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:29,053 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:29,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1809601360, now seen corresponding path program 42 times [2022-03-03 20:09:29,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:29,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683581675] [2022-03-03 20:09:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:29,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:29,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:29,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683581675] [2022-03-03 20:09:29,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683581675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:29,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992035501] [2022-03-03 20:09:29,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:09:29,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:29,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:29,287 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:29,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 20:09:29,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:09:29,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:29,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:29,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 115 [2022-03-03 20:09:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:31,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:32,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:32,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:32,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:32,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-03-03 20:09:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:33,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992035501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:33,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:33,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-03-03 20:09:33,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195350213] [2022-03-03 20:09:33,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:33,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 20:09:33,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:33,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 20:09:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-03-03 20:09:33,486 INFO L87 Difference]: Start difference. First operand 3436 states and 12540 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:58,027 INFO L93 Difference]: Finished difference Result 11873 states and 40846 transitions. [2022-03-03 20:09:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-03-03 20:09:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:09:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:58,052 INFO L225 Difference]: With dead ends: 11873 [2022-03-03 20:09:58,052 INFO L226 Difference]: Without dead ends: 11816 [2022-03-03 20:09:58,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31261 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=9130, Invalid=59776, Unknown=0, NotChecked=0, Total=68906 [2022-03-03 20:09:58,055 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 771 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 5822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3077 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:58,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 885 Invalid, 5822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2565 Invalid, 0 Unknown, 3077 Unchecked, 1.5s Time] [2022-03-03 20:09:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11816 states. [2022-03-03 20:09:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11816 to 3622. [2022-03-03 20:09:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 3.683789008561171) internal successors, (13339), 3621 states have internal predecessors, (13339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 13339 transitions. [2022-03-03 20:09:58,207 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 13339 transitions. Word has length 26 [2022-03-03 20:09:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:58,207 INFO L470 AbstractCegarLoop]: Abstraction has 3622 states and 13339 transitions. [2022-03-03 20:09:58,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 13339 transitions. [2022-03-03 20:09:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:58,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:58,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:58,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:58,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:58,413 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1901962258, now seen corresponding path program 43 times [2022-03-03 20:09:58,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:58,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371681960] [2022-03-03 20:09:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:58,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:58,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:58,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371681960] [2022-03-03 20:09:58,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371681960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:58,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399594867] [2022-03-03 20:09:58,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:09:58,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:58,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:58,654 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:58,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 20:09:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:58,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 20:09:58,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:59,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:59,129 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 109 treesize of output 107 [2022-03-03 20:10:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:00,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:01,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:01,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:01,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:01,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 145 [2022-03-03 20:10:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:02,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399594867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:02,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:02,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-03-03 20:10:02,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869013646] [2022-03-03 20:10:02,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:02,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:10:02,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:10:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:10:02,747 INFO L87 Difference]: Start difference. First operand 3622 states and 13339 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:06,011 INFO L93 Difference]: Finished difference Result 6615 states and 22720 transitions. [2022-03-03 20:10:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:10:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:10:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:06,026 INFO L225 Difference]: With dead ends: 6615 [2022-03-03 20:10:06,026 INFO L226 Difference]: Without dead ends: 6551 [2022-03-03 20:10:06,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1226, Invalid=5094, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 20:10:06,027 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 577 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 911 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:06,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 356 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 761 Invalid, 0 Unknown, 911 Unchecked, 0.5s Time] [2022-03-03 20:10:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2022-03-03 20:10:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 3723. [2022-03-03 20:10:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3722 states have (on average 3.6829661472326705) internal successors, (13708), 3722 states have internal predecessors, (13708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 13708 transitions. [2022-03-03 20:10:06,107 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 13708 transitions. Word has length 26 [2022-03-03 20:10:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:06,107 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 13708 transitions. [2022-03-03 20:10:06,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 13708 transitions. [2022-03-03 20:10:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:06,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:06,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:06,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-03 20:10:06,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-03 20:10:06,313 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:06,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1873974798, now seen corresponding path program 30 times [2022-03-03 20:10:06,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:06,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789055869] [2022-03-03 20:10:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:06,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:06,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:06,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789055869] [2022-03-03 20:10:06,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789055869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:06,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520269133] [2022-03-03 20:10:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:10:06,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:06,661 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:06,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 20:10:06,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:10:06,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:10:06,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:07,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:07,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:10:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:07,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:08,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:08,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:08,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:08,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 195 treesize of output 153 [2022-03-03 20:10:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:08,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520269133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:08,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:08,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-03 20:10:08,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318179824] [2022-03-03 20:10:08,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:08,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:10:08,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:10:08,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:10:08,842 INFO L87 Difference]: Start difference. First operand 3723 states and 13708 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:14,259 INFO L93 Difference]: Finished difference Result 6927 states and 23829 transitions. [2022-03-03 20:10:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:10:14,259 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:10:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:14,273 INFO L225 Difference]: With dead ends: 6927 [2022-03-03 20:10:14,273 INFO L226 Difference]: Without dead ends: 6891 [2022-03-03 20:10:14,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=869, Invalid=3961, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 20:10:14,274 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 421 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:14,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 449 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 828 Invalid, 0 Unknown, 790 Unchecked, 0.6s Time] [2022-03-03 20:10:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2022-03-03 20:10:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 3731. [2022-03-03 20:10:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3730 states have (on average 3.683646112600536) internal successors, (13740), 3730 states have internal predecessors, (13740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 13740 transitions. [2022-03-03 20:10:14,372 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 13740 transitions. Word has length 26 [2022-03-03 20:10:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 13740 transitions. [2022-03-03 20:10:14,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 13740 transitions. [2022-03-03 20:10:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:14,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:14,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:14,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-03 20:10:14,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:14,578 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:14,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1198785412, now seen corresponding path program 31 times [2022-03-03 20:10:14,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:14,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615829530] [2022-03-03 20:10:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:14,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:14,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:14,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615829530] [2022-03-03 20:10:14,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615829530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:14,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333588500] [2022-03-03 20:10:14,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:10:14,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:14,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:14,876 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:14,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 20:10:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:10:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:15,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:15,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:10:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:15,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:16,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:16,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:16,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:10:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:17,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333588500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:17,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:17,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:10:17,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274582620] [2022-03-03 20:10:17,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:17,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:10:17,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:17,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:10:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:10:17,574 INFO L87 Difference]: Start difference. First operand 3731 states and 13740 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:19,887 INFO L93 Difference]: Finished difference Result 5891 states and 20036 transitions. [2022-03-03 20:10:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 20:10:19,887 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:10:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:19,898 INFO L225 Difference]: With dead ends: 5891 [2022-03-03 20:10:19,898 INFO L226 Difference]: Without dead ends: 5839 [2022-03-03 20:10:19,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 20:10:19,899 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 333 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:19,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 393 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 824 Invalid, 0 Unknown, 394 Unchecked, 0.5s Time] [2022-03-03 20:10:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2022-03-03 20:10:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 3748. [2022-03-03 20:10:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 3.6872164398185214) internal successors, (13816), 3747 states have internal predecessors, (13816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 13816 transitions. [2022-03-03 20:10:19,967 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 13816 transitions. Word has length 26 [2022-03-03 20:10:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:19,967 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 13816 transitions. [2022-03-03 20:10:19,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 13816 transitions. [2022-03-03 20:10:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:19,972 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:19,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:19,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 20:10:20,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:20,173 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -862074390, now seen corresponding path program 32 times [2022-03-03 20:10:20,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:20,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689832470] [2022-03-03 20:10:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:20,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:20,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689832470] [2022-03-03 20:10:20,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689832470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:20,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013915862] [2022-03-03 20:10:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:10:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:20,549 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:20,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 20:10:20,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:10:20,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:20,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:10:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:21,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:21,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:10:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:21,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:22,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:22,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:22,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:22,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-03-03 20:10:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:22,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013915862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:22,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:22,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:10:22,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884910234] [2022-03-03 20:10:22,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:22,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:10:22,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:22,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:10:22,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:10:22,959 INFO L87 Difference]: Start difference. First operand 3748 states and 13816 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:32,220 INFO L93 Difference]: Finished difference Result 6519 states and 22560 transitions. [2022-03-03 20:10:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 20:10:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:10:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:32,233 INFO L225 Difference]: With dead ends: 6519 [2022-03-03 20:10:32,233 INFO L226 Difference]: Without dead ends: 6481 [2022-03-03 20:10:32,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1571, Invalid=8131, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 20:10:32,234 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 510 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1083 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:32,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 486 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1089 Invalid, 0 Unknown, 1083 Unchecked, 0.7s Time] [2022-03-03 20:10:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2022-03-03 20:10:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 3765. [2022-03-03 20:10:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3764 states have (on average 3.684643995749203) internal successors, (13869), 3764 states have internal predecessors, (13869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 13869 transitions. [2022-03-03 20:10:32,311 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 13869 transitions. Word has length 26 [2022-03-03 20:10:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:32,311 INFO L470 AbstractCegarLoop]: Abstraction has 3765 states and 13869 transitions. [2022-03-03 20:10:32,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 13869 transitions. [2022-03-03 20:10:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:32,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:32,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:32,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 20:10:32,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-03 20:10:32,518 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash -418747368, now seen corresponding path program 33 times [2022-03-03 20:10:32,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:32,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458274319] [2022-03-03 20:10:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:32,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:32,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458274319] [2022-03-03 20:10:32,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458274319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:32,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935136960] [2022-03-03 20:10:32,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:10:32,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:32,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:32,867 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:32,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 20:10:32,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:10:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:10:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:33,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:33,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:10:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:34,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:34,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:34,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:34,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:34,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-03-03 20:10:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:35,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935136960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:35,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:35,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:10:35,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402628589] [2022-03-03 20:10:35,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:35,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:10:35,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:10:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:10:35,478 INFO L87 Difference]: Start difference. First operand 3765 states and 13869 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:47,931 INFO L93 Difference]: Finished difference Result 7964 states and 26967 transitions. [2022-03-03 20:10:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 20:10:47,932 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:10:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:47,947 INFO L225 Difference]: With dead ends: 7964 [2022-03-03 20:10:47,948 INFO L226 Difference]: Without dead ends: 7920 [2022-03-03 20:10:47,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4507 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2125, Invalid=10307, Unknown=0, NotChecked=0, Total=12432 [2022-03-03 20:10:47,948 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 740 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1220 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:47,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 519 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1220 Invalid, 0 Unknown, 1220 Unchecked, 0.9s Time] [2022-03-03 20:10:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2022-03-03 20:10:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 3753. [2022-03-03 20:10:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.679904051172708) internal successors, (13807), 3752 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 13807 transitions. [2022-03-03 20:10:48,030 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 13807 transitions. Word has length 26 [2022-03-03 20:10:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:48,030 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 13807 transitions. [2022-03-03 20:10:48,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 13807 transitions. [2022-03-03 20:10:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:48,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:48,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:48,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:48,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-03 20:10:48,236 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:48,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 34 times [2022-03-03 20:10:48,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:48,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630196790] [2022-03-03 20:10:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:48,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:48,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:48,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630196790] [2022-03-03 20:10:48,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630196790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:48,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353847991] [2022-03-03 20:10:48,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:10:48,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:48,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:48,541 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:48,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 20:10:48,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:10:48,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:48,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:10:48,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:49,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:49,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:49,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:10:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:49,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:49,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:50,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:50,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 177 [2022-03-03 20:10:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:52,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353847991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:52,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:52,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:10:52,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647191953] [2022-03-03 20:10:52,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:52,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:10:52,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:10:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:10:52,223 INFO L87 Difference]: Start difference. First operand 3753 states and 13807 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:53,562 INFO L93 Difference]: Finished difference Result 5077 states and 17821 transitions. [2022-03-03 20:10:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:10:53,562 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:10:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:53,572 INFO L225 Difference]: With dead ends: 5077 [2022-03-03 20:10:53,572 INFO L226 Difference]: Without dead ends: 5005 [2022-03-03 20:10:53,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:10:53,573 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:53,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 276 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-03-03 20:10:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2022-03-03 20:10:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 3803. [2022-03-03 20:10:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 3.683587585481326) internal successors, (14005), 3802 states have internal predecessors, (14005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 14005 transitions. [2022-03-03 20:10:53,640 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 14005 transitions. Word has length 26 [2022-03-03 20:10:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:53,640 INFO L470 AbstractCegarLoop]: Abstraction has 3803 states and 14005 transitions. [2022-03-03 20:10:53,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 14005 transitions. [2022-03-03 20:10:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:53,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:53,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:53,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:53,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:53,846 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:53,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1643224858, now seen corresponding path program 35 times [2022-03-03 20:10:53,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:53,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574545101] [2022-03-03 20:10:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:53,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:54,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:54,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574545101] [2022-03-03 20:10:54,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574545101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:54,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838971389] [2022-03-03 20:10:54,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:10:54,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:54,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:54,272 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:54,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 20:10:54,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:10:54,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:54,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:10:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:54,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:54,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:54,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:10:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:55,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:55,693 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:10:55,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 157 [2022-03-03 20:10:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:57,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838971389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:57,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:57,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 20:10:57,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734188167] [2022-03-03 20:10:57,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:57,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:10:57,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:57,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:10:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:10:57,228 INFO L87 Difference]: Start difference. First operand 3803 states and 14005 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:59,494 INFO L93 Difference]: Finished difference Result 5945 states and 20361 transitions. [2022-03-03 20:10:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 20:10:59,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:10:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:59,506 INFO L225 Difference]: With dead ends: 5945 [2022-03-03 20:10:59,507 INFO L226 Difference]: Without dead ends: 5895 [2022-03-03 20:10:59,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 20:10:59,507 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 233 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:59,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 379 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 744 Invalid, 0 Unknown, 545 Unchecked, 0.4s Time] [2022-03-03 20:10:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-03-03 20:10:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 3811. [2022-03-03 20:10:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.6811023622047245) internal successors, (14025), 3810 states have internal predecessors, (14025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 14025 transitions. [2022-03-03 20:10:59,594 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 14025 transitions. Word has length 26 [2022-03-03 20:10:59,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:59,594 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 14025 transitions. [2022-03-03 20:10:59,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 14025 transitions. [2022-03-03 20:10:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:59,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:59,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:59,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-03 20:10:59,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:59,801 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:59,802 INFO L85 PathProgramCache]: Analyzing trace with hash 855040588, now seen corresponding path program 36 times [2022-03-03 20:10:59,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:59,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428195794] [2022-03-03 20:10:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:59,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:00,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:00,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428195794] [2022-03-03 20:11:00,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428195794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:00,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865071194] [2022-03-03 20:11:00,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:11:00,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:00,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:00,198 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:00,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 20:11:00,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:11:00,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:11:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:00,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:00,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:11:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:01,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:01,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:01,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:01,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 157 [2022-03-03 20:11:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:03,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865071194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:03,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:03,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-03 20:11:03,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004563007] [2022-03-03 20:11:03,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:03,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:11:03,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:03,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:11:03,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:11:03,642 INFO L87 Difference]: Start difference. First operand 3811 states and 14025 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:08,681 INFO L93 Difference]: Finished difference Result 7624 states and 25602 transitions. [2022-03-03 20:11:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:11:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:11:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:08,697 INFO L225 Difference]: With dead ends: 7624 [2022-03-03 20:11:08,697 INFO L226 Difference]: Without dead ends: 7552 [2022-03-03 20:11:08,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1049, Invalid=5271, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 20:11:08,698 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 436 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:08,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 531 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1682 Invalid, 0 Unknown, 455 Unchecked, 1.0s Time] [2022-03-03 20:11:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7552 states. [2022-03-03 20:11:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7552 to 3729. [2022-03-03 20:11:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 3.677038626609442) internal successors, (13708), 3728 states have internal predecessors, (13708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 13708 transitions. [2022-03-03 20:11:08,780 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 13708 transitions. Word has length 26 [2022-03-03 20:11:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:08,780 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 13708 transitions. [2022-03-03 20:11:08,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 13708 transitions. [2022-03-03 20:11:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:11:08,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:08,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:11:08,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-03 20:11:08,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-03 20:11:08,987 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:11:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:08,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1924650992, now seen corresponding path program 44 times [2022-03-03 20:11:08,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:08,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655897425] [2022-03-03 20:11:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:08,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:09,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:09,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655897425] [2022-03-03 20:11:09,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655897425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:09,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594970520] [2022-03-03 20:11:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:11:09,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:09,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:09,259 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:09,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 20:11:09,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:11:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:09,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:11:09,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:09,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:09,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:09,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-03-03 20:11:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:10,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:10,804 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:11:10,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-03-03 20:11:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:11,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594970520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:11,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:11,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-03 20:11:11,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676340230] [2022-03-03 20:11:11,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:11,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:11:11,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:11,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:11:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:11:11,432 INFO L87 Difference]: Start difference. First operand 3729 states and 13708 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:28,250 INFO L93 Difference]: Finished difference Result 8392 states and 28354 transitions. [2022-03-03 20:11:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-03-03 20:11:28,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:11:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:28,268 INFO L225 Difference]: With dead ends: 8392 [2022-03-03 20:11:28,268 INFO L226 Difference]: Without dead ends: 8324 [2022-03-03 20:11:28,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16099 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=5548, Invalid=32672, Unknown=0, NotChecked=0, Total=38220 [2022-03-03 20:11:28,270 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 533 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:28,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 881 Invalid, 3336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-03 20:11:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8324 states. [2022-03-03 20:11:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8324 to 3825. [2022-03-03 20:11:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 3.672855648535565) internal successors, (14045), 3824 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 14045 transitions. [2022-03-03 20:11:28,387 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 14045 transitions. Word has length 26 [2022-03-03 20:11:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:28,387 INFO L470 AbstractCegarLoop]: Abstraction has 3825 states and 14045 transitions. [2022-03-03 20:11:28,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 14045 transitions. [2022-03-03 20:11:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:11:28,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:28,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:11:28,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-03 20:11:28,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:28,594 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:11:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1576521584, now seen corresponding path program 45 times [2022-03-03 20:11:28,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:28,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142723698] [2022-03-03 20:11:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:28,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:28,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:28,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142723698] [2022-03-03 20:11:28,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142723698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:28,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277817538] [2022-03-03 20:11:28,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:11:28,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:28,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:28,851 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:28,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 20:11:28,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:11:28,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:11:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:29,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:29,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 115 [2022-03-03 20:11:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:32,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:33,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:33,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:33,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:33,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 111 [2022-03-03 20:11:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:34,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277817538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:34,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:34,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2022-03-03 20:11:34,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352234463] [2022-03-03 20:11:34,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:34,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 20:11:34,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:34,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 20:11:34,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:11:34,138 INFO L87 Difference]: Start difference. First operand 3825 states and 14045 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:01,926 INFO L93 Difference]: Finished difference Result 12957 states and 43362 transitions. [2022-03-03 20:12:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-03-03 20:12:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:12:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:01,955 INFO L225 Difference]: With dead ends: 12957 [2022-03-03 20:12:01,955 INFO L226 Difference]: Without dead ends: 12868 [2022-03-03 20:12:01,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 42 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 36416 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=10227, Invalid=61865, Unknown=0, NotChecked=0, Total=72092 [2022-03-03 20:12:01,958 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 777 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3318 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:01,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 1199 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2680 Invalid, 0 Unknown, 3318 Unchecked, 1.5s Time] [2022-03-03 20:12:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12868 states. [2022-03-03 20:12:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12868 to 3970. [2022-03-03 20:12:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3969 states have (on average 3.673217435122197) internal successors, (14579), 3969 states have internal predecessors, (14579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 14579 transitions. [2022-03-03 20:12:02,107 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 14579 transitions. Word has length 26 [2022-03-03 20:12:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:02,107 INFO L470 AbstractCegarLoop]: Abstraction has 3970 states and 14579 transitions. [2022-03-03 20:12:02,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 14579 transitions. [2022-03-03 20:12:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:02,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:02,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:02,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-03 20:12:02,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:02,313 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash 933591496, now seen corresponding path program 46 times [2022-03-03 20:12:02,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:02,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53060790] [2022-03-03 20:12:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:02,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:02,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:02,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53060790] [2022-03-03 20:12:02,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53060790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:02,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425396655] [2022-03-03 20:12:02,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:12:02,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:02,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:02,676 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:02,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 20:12:02,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:12:02,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:02,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:12:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:03,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:03,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:03,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 75 [2022-03-03 20:12:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:03,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:04,012 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:12:04,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:12:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:04,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425396655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:04,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:04,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:12:04,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838810011] [2022-03-03 20:12:04,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:04,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:12:04,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:04,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:12:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:12:04,566 INFO L87 Difference]: Start difference. First operand 3970 states and 14579 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:12,722 INFO L93 Difference]: Finished difference Result 6681 states and 23043 transitions. [2022-03-03 20:12:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 20:12:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:12:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:12,735 INFO L225 Difference]: With dead ends: 6681 [2022-03-03 20:12:12,735 INFO L226 Difference]: Without dead ends: 6644 [2022-03-03 20:12:12,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5341 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2128, Invalid=11914, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 20:12:12,736 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 533 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:12,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 546 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2318 Invalid, 0 Unknown, 84 Unchecked, 1.3s Time] [2022-03-03 20:12:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2022-03-03 20:12:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 3968. [2022-03-03 20:12:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.6748172422485506) internal successors, (14578), 3967 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:12,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14578 transitions. [2022-03-03 20:12:12,809 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14578 transitions. Word has length 26 [2022-03-03 20:12:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:12,809 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 14578 transitions. [2022-03-03 20:12:12,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14578 transitions. [2022-03-03 20:12:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:12,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:12,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:12,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-03 20:12:13,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-03 20:12:13,016 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:13,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1662477820, now seen corresponding path program 47 times [2022-03-03 20:12:13,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:13,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260957286] [2022-03-03 20:12:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:13,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:13,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:13,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260957286] [2022-03-03 20:12:13,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260957286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:13,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786240321] [2022-03-03 20:12:13,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:12:13,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:13,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:13,276 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:13,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 20:12:13,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:12:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:12:13,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:13,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:13,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:13,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 103 [2022-03-03 20:12:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:14,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:15,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:15,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:15,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 99 [2022-03-03 20:12:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:15,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786240321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:15,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:15,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 26 [2022-03-03 20:12:15,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238423090] [2022-03-03 20:12:15,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:15,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:12:15,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:12:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:12:15,647 INFO L87 Difference]: Start difference. First operand 3968 states and 14578 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:18,404 INFO L93 Difference]: Finished difference Result 5911 states and 20811 transitions. [2022-03-03 20:12:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:12:18,405 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:12:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:18,415 INFO L225 Difference]: With dead ends: 5911 [2022-03-03 20:12:18,416 INFO L226 Difference]: Without dead ends: 5881 [2022-03-03 20:12:18,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 20:12:18,416 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 330 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:18,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 334 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 844 Invalid, 0 Unknown, 408 Unchecked, 0.5s Time] [2022-03-03 20:12:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2022-03-03 20:12:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 3978. [2022-03-03 20:12:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 3.6743776716117678) internal successors, (14613), 3977 states have internal predecessors, (14613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 14613 transitions. [2022-03-03 20:12:18,518 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 14613 transitions. Word has length 26 [2022-03-03 20:12:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:18,518 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 14613 transitions. [2022-03-03 20:12:18,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 14613 transitions. [2022-03-03 20:12:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:18,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:18,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:18,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-03 20:12:18,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:18,725 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash 935903172, now seen corresponding path program 37 times [2022-03-03 20:12:18,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:18,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117867305] [2022-03-03 20:12:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:19,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:19,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117867305] [2022-03-03 20:12:19,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117867305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:19,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205784830] [2022-03-03 20:12:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:12:19,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:19,059 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:19,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 20:12:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:12:19,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:19,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:19,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:12:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:19,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:20,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:20,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:20,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:20,660 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 227 treesize of output 173 [2022-03-03 20:12:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:21,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205784830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:21,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:21,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-03 20:12:21,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827154136] [2022-03-03 20:12:21,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:21,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:12:21,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:21,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:12:21,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:12:21,373 INFO L87 Difference]: Start difference. First operand 3978 states and 14613 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 20:12:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:25,852 INFO L93 Difference]: Finished difference Result 6734 states and 23271 transitions. [2022-03-03 20:12:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 20:12:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 26 [2022-03-03 20:12:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:25,865 INFO L225 Difference]: With dead ends: 6734 [2022-03-03 20:12:25,865 INFO L226 Difference]: Without dead ends: 6698 [2022-03-03 20:12:25,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=832, Invalid=3860, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:12:25,866 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 450 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 546 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:25,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 444 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1029 Invalid, 0 Unknown, 546 Unchecked, 0.7s Time] [2022-03-03 20:12:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6698 states. [2022-03-03 20:12:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6698 to 3974. [2022-03-03 20:12:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 3.6725396425874655) internal successors, (14591), 3973 states have internal predecessors, (14591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 14591 transitions. [2022-03-03 20:12:25,941 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 14591 transitions. Word has length 26 [2022-03-03 20:12:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:25,941 INFO L470 AbstractCegarLoop]: Abstraction has 3974 states and 14591 transitions. [2022-03-03 20:12:25,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 20:12:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 14591 transitions. [2022-03-03 20:12:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:25,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:25,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:25,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:26,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:26,147 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash 449327520, now seen corresponding path program 48 times [2022-03-03 20:12:26,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:26,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178823233] [2022-03-03 20:12:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:26,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:26,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:26,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178823233] [2022-03-03 20:12:26,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178823233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:26,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73623323] [2022-03-03 20:12:26,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:12:26,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:26,444 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:26,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 20:12:26,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:12:26,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:26,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:12:26,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:26,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:26,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:26,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:26,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2022-03-03 20:12:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:27,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:27,961 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:12:27,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-03 20:12:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:28,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73623323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:28,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:28,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-03 20:12:28,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034022798] [2022-03-03 20:12:28,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:28,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:12:28,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:28,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:12:28,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:12:28,534 INFO L87 Difference]: Start difference. First operand 3974 states and 14591 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:43,123 INFO L93 Difference]: Finished difference Result 8216 states and 28116 transitions. [2022-03-03 20:12:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-03-03 20:12:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:12:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:43,139 INFO L225 Difference]: With dead ends: 8216 [2022-03-03 20:12:43,139 INFO L226 Difference]: Without dead ends: 8162 [2022-03-03 20:12:43,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14421 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=5256, Invalid=29154, Unknown=0, NotChecked=0, Total=34410 [2022-03-03 20:12:43,141 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 635 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:43,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 589 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:12:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2022-03-03 20:12:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 3915. [2022-03-03 20:12:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 3.670669391926418) internal successors, (14367), 3914 states have internal predecessors, (14367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 14367 transitions. [2022-03-03 20:12:43,235 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 14367 transitions. Word has length 26 [2022-03-03 20:12:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:43,235 INFO L470 AbstractCegarLoop]: Abstraction has 3915 states and 14367 transitions. [2022-03-03 20:12:43,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 14367 transitions. [2022-03-03 20:12:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:43,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:43,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:43,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-03 20:12:43,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-03 20:12:43,441 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:43,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:43,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1445850926, now seen corresponding path program 38 times [2022-03-03 20:12:43,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:43,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313065742] [2022-03-03 20:12:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:43,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:43,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:43,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313065742] [2022-03-03 20:12:43,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313065742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:43,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118452842] [2022-03-03 20:12:43,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:12:43,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:43,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:43,840 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:43,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 20:12:43,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:12:43,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:43,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:12:43,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:44,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:44,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:12:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:44,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:45,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:45,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:45,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:45,328 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 195 treesize of output 153 [2022-03-03 20:12:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:46,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118452842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:46,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:46,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-03 20:12:46,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040815475] [2022-03-03 20:12:46,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:46,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:12:46,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:12:46,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:12:46,204 INFO L87 Difference]: Start difference. First operand 3915 states and 14367 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:52,079 INFO L93 Difference]: Finished difference Result 7328 states and 25133 transitions. [2022-03-03 20:12:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:12:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:12:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:52,095 INFO L225 Difference]: With dead ends: 7328 [2022-03-03 20:12:52,096 INFO L226 Difference]: Without dead ends: 7298 [2022-03-03 20:12:52,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=934, Invalid=4036, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 20:12:52,096 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 580 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1035 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:52,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 418 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 848 Invalid, 0 Unknown, 1035 Unchecked, 0.6s Time] [2022-03-03 20:12:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7298 states. [2022-03-03 20:12:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7298 to 3912. [2022-03-03 20:12:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 3.6709281513679364) internal successors, (14357), 3911 states have internal predecessors, (14357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 14357 transitions. [2022-03-03 20:12:52,218 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 14357 transitions. Word has length 26 [2022-03-03 20:12:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:52,218 INFO L470 AbstractCegarLoop]: Abstraction has 3912 states and 14357 transitions. [2022-03-03 20:12:52,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 14357 transitions. [2022-03-03 20:12:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:52,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:52,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:52,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:52,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:52,424 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash 898886322, now seen corresponding path program 39 times [2022-03-03 20:12:52,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:52,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568204437] [2022-03-03 20:12:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:52,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:52,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568204437] [2022-03-03 20:12:52,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568204437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:52,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26035518] [2022-03-03 20:12:52,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:12:52,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:52,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:52,736 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:52,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 20:12:52,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:12:52,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:52,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:12:52,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:53,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:53,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:12:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:53,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:54,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:54,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-03-03 20:13:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:01,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26035518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:01,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:01,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-03 20:13:01,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160813025] [2022-03-03 20:13:01,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:01,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:13:01,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:13:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:13:01,084 INFO L87 Difference]: Start difference. First operand 3912 states and 14357 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:15,942 INFO L93 Difference]: Finished difference Result 10739 states and 35315 transitions. [2022-03-03 20:13:15,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-03 20:13:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:13:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:15,964 INFO L225 Difference]: With dead ends: 10739 [2022-03-03 20:13:15,964 INFO L226 Difference]: Without dead ends: 10705 [2022-03-03 20:13:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8230 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=3448, Invalid=17722, Unknown=0, NotChecked=0, Total=21170 [2022-03-03 20:13:15,965 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 761 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:15,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 584 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1699 Invalid, 0 Unknown, 610 Unchecked, 1.2s Time] [2022-03-03 20:13:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2022-03-03 20:13:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 3884. [2022-03-03 20:13:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3883 states have (on average 3.6677826422868915) internal successors, (14242), 3883 states have internal predecessors, (14242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 14242 transitions. [2022-03-03 20:13:16,072 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 14242 transitions. Word has length 26 [2022-03-03 20:13:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:16,072 INFO L470 AbstractCegarLoop]: Abstraction has 3884 states and 14242 transitions. [2022-03-03 20:13:16,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 14242 transitions. [2022-03-03 20:13:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:16,077 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:16,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:16,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-03 20:13:16,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:16,278 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash 764191466, now seen corresponding path program 40 times [2022-03-03 20:13:16,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:16,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220454955] [2022-03-03 20:13:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:16,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:16,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:16,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220454955] [2022-03-03 20:13:16,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220454955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:16,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192383280] [2022-03-03 20:13:16,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:13:16,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:16,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:16,572 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:16,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 20:13:16,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:13:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:13:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:17,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:17,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:17,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:13:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:17,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:17,880 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:13:17,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:13:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:19,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192383280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:19,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:19,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:13:19,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920578072] [2022-03-03 20:13:19,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:19,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:13:19,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:13:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:13:19,507 INFO L87 Difference]: Start difference. First operand 3884 states and 14242 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:22,904 INFO L93 Difference]: Finished difference Result 6453 states and 22188 transitions. [2022-03-03 20:13:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:13:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:13:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:22,917 INFO L225 Difference]: With dead ends: 6453 [2022-03-03 20:13:22,917 INFO L226 Difference]: Without dead ends: 6408 [2022-03-03 20:13:22,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=691, Invalid=4421, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:13:22,917 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 312 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:22,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 356 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:13:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2022-03-03 20:13:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 3886. [2022-03-03 20:13:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 3.6707850707850707) internal successors, (14261), 3885 states have internal predecessors, (14261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 14261 transitions. [2022-03-03 20:13:22,994 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 14261 transitions. Word has length 26 [2022-03-03 20:13:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:22,994 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 14261 transitions. [2022-03-03 20:13:22,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 14261 transitions. [2022-03-03 20:13:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:23,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:23,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:23,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-03 20:13:23,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:23,200 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:23,201 INFO L85 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 41 times [2022-03-03 20:13:23,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:23,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629088540] [2022-03-03 20:13:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:23,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:23,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:23,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629088540] [2022-03-03 20:13:23,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629088540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:23,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326606103] [2022-03-03 20:13:23,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:13:23,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:23,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:23,366 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:23,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 20:13:23,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:13:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:13:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:23,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:23,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:23,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:13:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:24,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:24,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:24,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:24,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-03 20:13:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:25,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326606103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:25,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:25,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:13:25,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310027976] [2022-03-03 20:13:25,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:25,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:13:25,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:13:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:13:25,711 INFO L87 Difference]: Start difference. First operand 3886 states and 14261 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:32,876 INFO L93 Difference]: Finished difference Result 7468 states and 24715 transitions. [2022-03-03 20:13:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 20:13:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:13:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:32,890 INFO L225 Difference]: With dead ends: 7468 [2022-03-03 20:13:32,890 INFO L226 Difference]: Without dead ends: 7324 [2022-03-03 20:13:32,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1647, Invalid=10125, Unknown=0, NotChecked=0, Total=11772 [2022-03-03 20:13:32,891 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 423 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:32,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 435 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:13:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2022-03-03 20:13:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 3965. [2022-03-03 20:13:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3965 states, 3964 states have (on average 3.66422805247225) internal successors, (14525), 3964 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3965 states to 3965 states and 14525 transitions. [2022-03-03 20:13:32,976 INFO L78 Accepts]: Start accepts. Automaton has 3965 states and 14525 transitions. Word has length 26 [2022-03-03 20:13:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:32,976 INFO L470 AbstractCegarLoop]: Abstraction has 3965 states and 14525 transitions. [2022-03-03 20:13:32,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3965 states and 14525 transitions. [2022-03-03 20:13:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:32,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:32,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:32,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:33,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-03 20:13:33,183 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:33,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:33,183 INFO L85 PathProgramCache]: Analyzing trace with hash -384612468, now seen corresponding path program 42 times [2022-03-03 20:13:33,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:33,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249892435] [2022-03-03 20:13:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:33,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:33,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:33,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249892435] [2022-03-03 20:13:33,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249892435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:33,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032946925] [2022-03-03 20:13:33,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:13:33,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:33,343 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:33,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 20:13:33,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:13:33,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:13:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:33,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:33,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:13:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:34,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:35,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:35,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:35,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:35,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-03-03 20:13:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:35,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032946925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:35,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:35,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-03 20:13:35,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762085692] [2022-03-03 20:13:35,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:35,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 20:13:35,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:35,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 20:13:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-03-03 20:13:35,892 INFO L87 Difference]: Start difference. First operand 3965 states and 14525 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:44,954 INFO L93 Difference]: Finished difference Result 7287 states and 24926 transitions. [2022-03-03 20:13:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 20:13:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:13:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:44,969 INFO L225 Difference]: With dead ends: 7287 [2022-03-03 20:13:44,969 INFO L226 Difference]: Without dead ends: 7226 [2022-03-03 20:13:44,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1529, Invalid=7783, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 20:13:44,970 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 433 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 3615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:44,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 704 Invalid, 3615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 20:13:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2022-03-03 20:13:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 4020. [2022-03-03 20:13:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4019 states have (on average 3.6588703657626276) internal successors, (14705), 4019 states have internal predecessors, (14705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 14705 transitions. [2022-03-03 20:13:45,052 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 14705 transitions. Word has length 26 [2022-03-03 20:13:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:45,052 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 14705 transitions. [2022-03-03 20:13:45,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 14705 transitions. [2022-03-03 20:13:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:45,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:45,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:45,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:45,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:45,259 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash -404580494, now seen corresponding path program 43 times [2022-03-03 20:13:45,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:45,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489608422] [2022-03-03 20:13:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:45,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:45,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:45,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489608422] [2022-03-03 20:13:45,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489608422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:45,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261666457] [2022-03-03 20:13:45,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:13:45,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:45,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:45,399 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:45,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 20:13:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:13:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:45,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:45,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:45,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:13:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:46,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:46,405 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:13:46,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 161 [2022-03-03 20:13:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:47,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261666457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:47,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:47,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 20:13:47,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219866303] [2022-03-03 20:13:47,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:47,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:13:47,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:47,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:13:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:13:47,765 INFO L87 Difference]: Start difference. First operand 4020 states and 14705 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:49,339 INFO L93 Difference]: Finished difference Result 5854 states and 20230 transitions. [2022-03-03 20:13:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 20:13:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:13:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:49,351 INFO L225 Difference]: With dead ends: 5854 [2022-03-03 20:13:49,351 INFO L226 Difference]: Without dead ends: 5804 [2022-03-03 20:13:49,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:13:49,351 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 195 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:49,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 277 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:13:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2022-03-03 20:13:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 4039. [2022-03-03 20:13:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4039 states, 4038 states have (on average 3.6594848935116393) internal successors, (14777), 4038 states have internal predecessors, (14777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 14777 transitions. [2022-03-03 20:13:49,417 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 14777 transitions. Word has length 26 [2022-03-03 20:13:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:49,417 INFO L470 AbstractCegarLoop]: Abstraction has 4039 states and 14777 transitions. [2022-03-03 20:13:49,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 14777 transitions. [2022-03-03 20:13:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:49,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:49,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:49,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-03 20:13:49,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:49,623 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:49,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1484986580, now seen corresponding path program 44 times [2022-03-03 20:13:49,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:49,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577343853] [2022-03-03 20:13:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:49,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:49,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:49,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577343853] [2022-03-03 20:13:49,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577343853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:49,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341982790] [2022-03-03 20:13:49,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:13:49,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:49,777 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:49,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 20:13:49,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:13:49,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:13:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:50,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:50,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:13:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:50,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:50,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:50,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 157 [2022-03-03 20:13:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:52,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341982790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:52,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:52,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:13:52,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362231773] [2022-03-03 20:13:52,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:52,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:13:52,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:13:52,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:13:52,456 INFO L87 Difference]: Start difference. First operand 4039 states and 14777 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:55,071 INFO L93 Difference]: Finished difference Result 6491 states and 22205 transitions. [2022-03-03 20:13:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 20:13:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:13:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:55,084 INFO L225 Difference]: With dead ends: 6491 [2022-03-03 20:13:55,085 INFO L226 Difference]: Without dead ends: 6403 [2022-03-03 20:13:55,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 20:13:55,085 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 285 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:55,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 256 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 881 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-03-03 20:13:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2022-03-03 20:13:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 4095. [2022-03-03 20:13:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4095 states, 4094 states have (on average 3.657303370786517) internal successors, (14973), 4094 states have internal predecessors, (14973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 14973 transitions. [2022-03-03 20:13:55,167 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 14973 transitions. Word has length 26 [2022-03-03 20:13:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:55,167 INFO L470 AbstractCegarLoop]: Abstraction has 4095 states and 14973 transitions. [2022-03-03 20:13:55,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 14973 transitions. [2022-03-03 20:13:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:55,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:55,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:55,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-03 20:13:55,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:55,374 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 367617680, now seen corresponding path program 45 times [2022-03-03 20:13:55,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:55,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208433249] [2022-03-03 20:13:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:55,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:55,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:55,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208433249] [2022-03-03 20:13:55,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208433249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:55,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080567747] [2022-03-03 20:13:55,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:13:55,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:55,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:55,606 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:55,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 20:13:55,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:13:55,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:55,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:13:55,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:56,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:56,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-03 20:13:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:56,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:57,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:57,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 169 [2022-03-03 20:14:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:17,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080567747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:17,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:17,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:14:17,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167809213] [2022-03-03 20:14:17,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:17,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:14:17,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:17,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:14:17,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:14:17,849 INFO L87 Difference]: Start difference. First operand 4095 states and 14973 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:21,493 INFO L93 Difference]: Finished difference Result 6478 states and 22229 transitions. [2022-03-03 20:14:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:14:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:14:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:21,505 INFO L225 Difference]: With dead ends: 6478 [2022-03-03 20:14:21,506 INFO L226 Difference]: Without dead ends: 6407 [2022-03-03 20:14:21,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=733, Invalid=2927, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:14:21,506 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 364 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:21,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 307 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 818 Invalid, 0 Unknown, 424 Unchecked, 0.5s Time] [2022-03-03 20:14:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2022-03-03 20:14:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 4098. [2022-03-03 20:14:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 3.656822064925555) internal successors, (14982), 4097 states have internal predecessors, (14982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 14982 transitions. [2022-03-03 20:14:21,577 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 14982 transitions. Word has length 26 [2022-03-03 20:14:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:21,577 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 14982 transitions. [2022-03-03 20:14:21,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 14982 transitions. [2022-03-03 20:14:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:21,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:21,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:21,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-03 20:14:21,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:21,784 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 46 times [2022-03-03 20:14:21,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:21,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441359950] [2022-03-03 20:14:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:21,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:21,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:21,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441359950] [2022-03-03 20:14:21,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441359950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:21,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170053417] [2022-03-03 20:14:21,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:14:21,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:21,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:21,938 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:21,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 20:14:21,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:14:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:14:21,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:22,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:22,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:22,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:14:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:22,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:22,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:22,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:22,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:14:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:27,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170053417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:27,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:27,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:14:27,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610126087] [2022-03-03 20:14:27,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:27,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:14:27,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:14:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:14:27,752 INFO L87 Difference]: Start difference. First operand 4098 states and 14982 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:30,139 INFO L93 Difference]: Finished difference Result 6144 states and 21159 transitions. [2022-03-03 20:14:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 20:14:30,140 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:14:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:30,152 INFO L225 Difference]: With dead ends: 6144 [2022-03-03 20:14:30,152 INFO L226 Difference]: Without dead ends: 6054 [2022-03-03 20:14:30,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:14:30,153 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 222 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:30,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 295 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:14:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2022-03-03 20:14:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 4123. [2022-03-03 20:14:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 4122 states have (on average 3.6530810286268802) internal successors, (15058), 4122 states have internal predecessors, (15058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 15058 transitions. [2022-03-03 20:14:30,253 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 15058 transitions. Word has length 26 [2022-03-03 20:14:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:30,253 INFO L470 AbstractCegarLoop]: Abstraction has 4123 states and 15058 transitions. [2022-03-03 20:14:30,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 15058 transitions. [2022-03-03 20:14:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:30,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:30,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:30,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-03 20:14:30,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-03 20:14:30,460 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash -742785592, now seen corresponding path program 47 times [2022-03-03 20:14:30,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:30,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822493003] [2022-03-03 20:14:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:30,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:30,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822493003] [2022-03-03 20:14:30,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822493003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:30,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957938370] [2022-03-03 20:14:30,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:14:30,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:30,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:30,594 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:30,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 20:14:30,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:14:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:14:30,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:31,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:31,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:31,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:14:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:31,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:31,532 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:14:31,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 Received shutdown request... [2022-03-03 20:14:33,331 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:14:33,333 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 20:14:33,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:33,368 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:14:33,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-03 20:14:33,552 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. [2022-03-03 20:14:33,553 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 20:14:33,554 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 20:14:33,554 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 20:14:33,556 INFO L732 BasicCegarLoop]: Path program histogram: [48, 47, 1, 1, 1] [2022-03-03 20:14:33,558 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:14:33,558 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:14:33,560 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:14:33 BasicIcfg [2022-03-03 20:14:33,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:14:33,560 INFO L158 Benchmark]: Toolchain (without parser) took 715835.76ms. Allocated memory was 197.1MB in the beginning and 692.1MB in the end (delta: 494.9MB). Free memory was 157.1MB in the beginning and 324.7MB in the end (delta: -167.6MB). Peak memory consumption was 549.6MB. Max. memory is 8.0GB. [2022-03-03 20:14:33,560 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.16ms. Allocated memory is still 197.1MB. Free memory is still 158.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:14:33,560 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.72ms. Allocated memory is still 197.1MB. Free memory was 157.0MB in the beginning and 155.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:14:33,560 INFO L158 Benchmark]: Boogie Preprocessor took 22.63ms. Allocated memory is still 197.1MB. Free memory was 155.5MB in the beginning and 154.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:14:33,561 INFO L158 Benchmark]: RCFGBuilder took 245.80ms. Allocated memory is still 197.1MB. Free memory was 154.5MB in the beginning and 145.1MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 20:14:33,561 INFO L158 Benchmark]: TraceAbstraction took 715530.25ms. Allocated memory was 197.1MB in the beginning and 692.1MB in the end (delta: 494.9MB). Free memory was 144.7MB in the beginning and 324.7MB in the end (delta: -180.0MB). Peak memory consumption was 537.0MB. Max. memory is 8.0GB. [2022-03-03 20:14:33,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16ms. Allocated memory is still 197.1MB. Free memory is still 158.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.72ms. Allocated memory is still 197.1MB. Free memory was 157.0MB in the beginning and 155.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.63ms. Allocated memory is still 197.1MB. Free memory was 155.5MB in the beginning and 154.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 245.80ms. Allocated memory is still 197.1MB. Free memory was 154.5MB in the beginning and 145.1MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 715530.25ms. Allocated memory was 197.1MB in the beginning and 692.1MB in the end (delta: 494.9MB). Free memory was 144.7MB in the beginning and 324.7MB in the end (delta: -180.0MB). Peak memory consumption was 537.0MB. 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: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - 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 analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - 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 analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 715.4s, OverallIterations: 98, TraceHistogramMax: 2, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.4s, AutomataDifference: 462.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38695 SdHoareTripleChecker+Valid, 67.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38695 mSDsluCounter, 34235 SdHoareTripleChecker+Invalid, 57.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 23896 IncrementalHoareTripleChecker+Unchecked, 59105 mSDsCounter, 7688 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 114262 IncrementalHoareTripleChecker+Invalid, 145846 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7688 mSolverCounterUnsat, 2951 mSDtfsCounter, 114262 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10771 GetRequests, 3528 SyntacticMatches, 268 SemanticMatches, 6975 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 299401 ImplicationChecksByTransitivity, 422.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4123occurred in iteration=97, InterpolantAutomatonStates: 5839, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.7s AutomataMinimizationTime, 97 MinimizatonAttempts, 237530 StatesRemovedByMinimization, 97 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 220.5s InterpolantComputationTime, 4778 NumberOfCodeBlocks, 4772 NumberOfCodeBlocksAsserted, 306 NumberOfCheckSat, 6853 ConstructedInterpolants, 111 QuantifiedInterpolants, 154289 SizeOfPredicates, 1045 NumberOfNonLiveVariables, 5975 ConjunctsInSsa, 1793 ConjunctsInUnsatCore, 285 InterpolantComputations, 3 PerfectInterpolantSequences, 174/1604 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