/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-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 20:03:23,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 20:03:23,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 20:03:23,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 20:03:23,203 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 20:03:23,218 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 20:03:23,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 20:03:23,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 20:03:23,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 20:03:23,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 20:03:23,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 20:03:23,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 20:03:23,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 20:03:23,220 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 20:03:23,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 20:03:23,220 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 20:03:23,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 20:03:23,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 20:03:23,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 20:03:23,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 20:03:23,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 20:03:23,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 20:03:23,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:03:23,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 20:03:23,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 20:03:23,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 20:03:23,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 20:03:23,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 20:03:23,223 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 20:03:23,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 20:03:23,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 20:03:23,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 20:03:23,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 20:03:23,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 20:03:23,447 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 20:03:23,448 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 20:03:23,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl [2022-03-03 20:03:23,449 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl' [2022-03-03 20:03:23,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 20:03:23,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 20:03:23,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 20:03:23,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 20:03:23,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 20:03:23,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,488 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 20:03:23,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 20:03:23,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 20:03:23,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 20:03:23,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 20:03:23,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 20:03:23,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 20:03:23,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 20:03:23,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 20:03:23,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/1) ... [2022-03-03 20:03:23,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:03:23,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:23,557 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 20:03:23,592 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 20:03:23,607 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 20:03:23,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 20:03:23,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 20:03:23,607 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 20:03:23,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 20:03:23,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 20:03:23,607 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 20:03:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 20:03:23,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 20:03:23,608 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 20:03:23,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 20:03:23,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 20:03:23,610 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 20:03:23,646 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 20:03:23,647 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 20:03:23,719 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 20:03:23,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 20:03:23,729 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 20:03:23,731 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:03:23 BoogieIcfgContainer [2022-03-03 20:03:23,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 20:03:23,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 20:03:23,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 20:03:23,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 20:03:23,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:23" (1/2) ... [2022-03-03 20:03:23,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9fe382 and model type min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:03:23, skipping insertion in model container [2022-03-03 20:03:23,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:03:23" (2/2) ... [2022-03-03 20:03:23,736 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun-alt.wvr.bpl [2022-03-03 20:03:23,739 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 20:03:23,739 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 20:03:23,739 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 20:03:23,739 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 20:03:23,793 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 20:03:23,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 20:03:23,846 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 20:03:23,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 20:03:23,857 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-03 20:03:23,893 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 20:03:23,896 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 20:03:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 20:03:23,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:23,903 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 20:03:23,903 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-03-03 20:03:23,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:23,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856208701] [2022-03-03 20:03:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:23,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:24,030 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 20:03:24,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:24,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856208701] [2022-03-03 20:03:24,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856208701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:03:24,031 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:03:24,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 20:03:24,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154024250] [2022-03-03 20:03:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:03:24,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 20:03:24,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 20:03:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 20:03:24,054 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 20:03:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:24,087 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-03 20:03:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 20:03:24,089 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 20:03:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:24,098 INFO L225 Difference]: With dead ends: 217 [2022-03-03 20:03:24,098 INFO L226 Difference]: Without dead ends: 202 [2022-03-03 20:03:24,100 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 20:03:24,105 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 20:03:24,106 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 20:03:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-03 20:03:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-03 20:03:24,200 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 20:03:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-03 20:03:24,204 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-03 20:03:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:24,205 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-03 20:03:24,205 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 20:03:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-03 20:03:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 20:03:24,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:24,207 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 20:03:24,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 20:03:24,207 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-03-03 20:03:24,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:24,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795543898] [2022-03-03 20:03:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:24,260 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 20:03:24,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:24,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795543898] [2022-03-03 20:03:24,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795543898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:03:24,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:03:24,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:03:24,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94708148] [2022-03-03 20:03:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:03:24,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:03:24,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:03:24,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 20:03:24,263 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 20:03:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:24,313 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-03 20:03:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 20:03:24,314 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 20:03:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:24,327 INFO L225 Difference]: With dead ends: 158 [2022-03-03 20:03:24,328 INFO L226 Difference]: Without dead ends: 158 [2022-03-03 20:03:24,328 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 20:03:24,329 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:24,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:03:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-03 20:03:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-03 20:03:24,341 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 20:03:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-03 20:03:24,343 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-03 20:03:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:24,344 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-03 20:03:24,344 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 20:03:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-03 20:03:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 20:03:24,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:24,345 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 20:03:24,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 20:03:24,346 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-03-03 20:03:24,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:24,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889220841] [2022-03-03 20:03:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:24,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:24,392 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 20:03:24,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:24,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889220841] [2022-03-03 20:03:24,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889220841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:03:24,393 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:03:24,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:03:24,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329148884] [2022-03-03 20:03:24,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:03:24,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 20:03:24,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:24,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 20:03:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:03:24,394 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 20:03:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:24,450 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-03 20:03:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:03:24,451 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 20:03:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:24,452 INFO L225 Difference]: With dead ends: 183 [2022-03-03 20:03:24,453 INFO L226 Difference]: Without dead ends: 183 [2022-03-03 20:03:24,453 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 20:03:24,454 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 20:03:24,454 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 20:03:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-03 20:03:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-03 20:03:24,488 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 20:03:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-03 20:03:24,490 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-03 20:03:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:24,490 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-03 20:03:24,490 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 20:03:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-03 20:03:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:24,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:24,492 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 20:03:24,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 20:03:24,492 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:24,493 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-03-03 20:03:24,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:24,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857868980] [2022-03-03 20:03:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:24,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:24,848 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 20:03:24,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:24,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857868980] [2022-03-03 20:03:24,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857868980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:24,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308352700] [2022-03-03 20:03:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:24,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:24,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:24,868 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 20:03:24,870 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 20:03:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:24,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 20:03:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:25,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:25,331 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 20:03:25,397 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 20:03:25,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:25,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:25,545 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 20:03:25,719 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 20:03:25,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308352700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:25,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:25,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:25,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571008988] [2022-03-03 20:03:25,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:25,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:03:25,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:03:25,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:03:25,721 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 20:03:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:26,004 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-03 20:03:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:03:26,004 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 20:03:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:26,007 INFO L225 Difference]: With dead ends: 366 [2022-03-03 20:03:26,008 INFO L226 Difference]: Without dead ends: 351 [2022-03-03 20:03:26,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:03:26,009 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:26,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 61 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-03 20:03:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-03 20:03:26,021 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 20:03:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-03 20:03:26,023 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-03 20:03:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:26,023 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-03 20:03:26,023 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 20:03:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-03 20:03:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:26,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:26,025 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 20:03:26,062 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 20:03:26,244 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 20:03:26,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-03-03 20:03:26,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:26,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313729293] [2022-03-03 20:03:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:26,428 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 20:03:26,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:26,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313729293] [2022-03-03 20:03:26,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313729293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:26,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057073648] [2022-03-03 20:03:26,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:26,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:26,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:26,431 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 20:03:26,456 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 20:03:26,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:26,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:26,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 20:03:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:26,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:26,699 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 20:03:27,067 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 20:03:27,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:27,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:27,174 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 20:03:27,337 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 20:03:27,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057073648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:27,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:27,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-03-03 20:03:27,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250787176] [2022-03-03 20:03:27,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:27,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:03:27,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:27,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:03:27,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:03:27,339 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 20:03:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:28,158 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-03-03 20:03:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:03:28,159 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 20:03:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:28,161 INFO L225 Difference]: With dead ends: 478 [2022-03-03 20:03:28,161 INFO L226 Difference]: Without dead ends: 463 [2022-03-03 20:03:28,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:03:28,162 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 281 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:28,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 128 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-03 20:03:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-03-03 20:03:28,171 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 20:03:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-03 20:03:28,172 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-03 20:03:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:28,172 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-03 20:03:28,172 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 20:03:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-03 20:03:28,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:28,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:28,173 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 20:03:28,192 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 20:03:28,390 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 20:03:28,390 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:28,390 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-03-03 20:03:28,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:28,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518738058] [2022-03-03 20:03:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:28,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:28,516 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 20:03:28,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:28,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518738058] [2022-03-03 20:03:28,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518738058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:28,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566942088] [2022-03-03 20:03:28,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:28,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:28,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:28,532 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 20:03:28,533 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 20:03:28,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:03:28,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:03:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:28,727 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 20:03:28,804 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 20:03:28,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:28,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:28,857 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 20:03:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:29,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566942088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:29,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:29,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 20:03:29,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880315589] [2022-03-03 20:03:29,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:29,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:03:29,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:03:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:29,009 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 20:03:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:29,324 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-03-03 20:03:29,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:03:29,324 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 20:03:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:29,326 INFO L225 Difference]: With dead ends: 418 [2022-03-03 20:03:29,326 INFO L226 Difference]: Without dead ends: 403 [2022-03-03 20:03:29,327 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 20:03:29,327 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:29,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 122 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-03 20:03:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-03-03 20:03:29,357 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 20:03:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-03 20:03:29,358 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-03 20:03:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-03 20:03:29,358 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 20:03:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-03 20:03:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:29,359 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:29,359 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 20:03:29,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-03 20:03:29,560 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 20:03:29,560 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:29,561 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-03-03 20:03:29,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:29,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139405380] [2022-03-03 20:03:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:29,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:29,709 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 20:03:29,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:29,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139405380] [2022-03-03 20:03:29,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139405380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:29,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152224500] [2022-03-03 20:03:29,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:29,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:29,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:29,712 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 20:03:29,713 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 20:03:29,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 20:03:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:29,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:29,921 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-03-03 20:03:30,153 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 20:03:30,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:30,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:30,219 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 20:03:30,382 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 20:03:30,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152224500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:30,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:30,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 20:03:30,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508913120] [2022-03-03 20:03:30,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:30,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:30,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:30,383 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 20:03:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:30,647 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-03-03 20:03:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:03:30,647 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 20:03:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:30,649 INFO L225 Difference]: With dead ends: 381 [2022-03-03 20:03:30,649 INFO L226 Difference]: Without dead ends: 366 [2022-03-03 20:03:30,649 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 20:03:30,650 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:30,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 135 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 318 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-03-03 20:03:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-03 20:03:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-03-03 20:03:30,655 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 20:03:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-03-03 20:03:30,656 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-03-03 20:03:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:30,657 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-03-03 20:03:30,657 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 20:03:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-03-03 20:03:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:30,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:30,658 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 20:03:30,694 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 20:03:30,871 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 20:03:30,872 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-03-03 20:03:30,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:30,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400752800] [2022-03-03 20:03:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:30,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:31,029 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 20:03:31,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:31,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400752800] [2022-03-03 20:03:31,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400752800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:31,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621373785] [2022-03-03 20:03:31,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:31,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:31,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:31,037 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 20:03:31,038 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 20:03:31,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:31,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:31,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 20:03:31,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:31,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:31,216 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 20:03:31,388 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 20:03:31,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:31,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:31,458 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 20:03:31,593 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 20:03:31,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621373785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:31,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:31,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 20:03:31,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771898046] [2022-03-03 20:03:31,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:31,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:31,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:31,595 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 20:03:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:32,497 INFO L93 Difference]: Finished difference Result 672 states and 1913 transitions. [2022-03-03 20:03:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 20:03:32,497 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 20:03:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:32,500 INFO L225 Difference]: With dead ends: 672 [2022-03-03 20:03:32,500 INFO L226 Difference]: Without dead ends: 657 [2022-03-03 20:03:32,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 20:03:32,502 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:32,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 135 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-03 20:03:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 253. [2022-03-03 20:03:32,509 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 20:03:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 741 transitions. [2022-03-03 20:03:32,509 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 741 transitions. Word has length 22 [2022-03-03 20:03:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:32,510 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 741 transitions. [2022-03-03 20:03:32,510 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 20:03:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 741 transitions. [2022-03-03 20:03:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:32,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:32,510 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 20:03:32,530 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 20:03:32,730 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 20:03:32,730 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 70299084, now seen corresponding path program 6 times [2022-03-03 20:03:32,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:32,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014632656] [2022-03-03 20:03:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:32,868 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 20:03:32,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:32,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014632656] [2022-03-03 20:03:32,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014632656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:32,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812309195] [2022-03-03 20:03:32,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:32,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:32,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:32,870 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 20:03:32,871 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 20:03:32,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:03:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 20:03:32,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:33,067 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 20:03:33,151 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 20:03:33,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:33,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:33,226 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 20:03:33,326 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 20:03:33,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812309195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:33,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:33,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-03 20:03:33,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018968254] [2022-03-03 20:03:33,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:33,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:33,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:33,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:33,328 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 20:03:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:33,995 INFO L93 Difference]: Finished difference Result 471 states and 1359 transitions. [2022-03-03 20:03:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:03:33,996 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 20:03:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:33,998 INFO L225 Difference]: With dead ends: 471 [2022-03-03 20:03:33,998 INFO L226 Difference]: Without dead ends: 456 [2022-03-03 20:03:33,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:03:33,999 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:33,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 161 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-03-03 20:03:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 247. [2022-03-03 20:03:34,004 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 20:03:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-03-03 20:03:34,004 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-03-03 20:03:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:34,004 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-03-03 20:03:34,005 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 20:03:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-03-03 20:03:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:34,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:34,005 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] [2022-03-03 20:03:34,028 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 20:03:34,228 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 20:03:34,228 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:34,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-03-03 20:03:34,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:34,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313080910] [2022-03-03 20:03:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:34,280 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 20:03:34,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:34,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313080910] [2022-03-03 20:03:34,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313080910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:34,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343962102] [2022-03-03 20:03:34,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:34,282 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 20:03:34,282 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 20:03:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:34,414 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 20:03:34,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:34,500 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 20:03:34,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343962102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:34,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:34,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 20:03:34,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501293721] [2022-03-03 20:03:34,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:34,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:03:34,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:03:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:34,502 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 20:03:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:35,275 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-03-03 20:03:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:03:35,276 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 20:03:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:35,280 INFO L225 Difference]: With dead ends: 1099 [2022-03-03 20:03:35,281 INFO L226 Difference]: Without dead ends: 1099 [2022-03-03 20:03:35,281 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 20:03:35,282 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:35,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 211 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-03 20:03:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-03-03 20:03:35,295 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 20:03:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-03-03 20:03:35,296 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-03-03 20:03:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:35,297 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-03-03 20:03:35,297 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 20:03:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-03-03 20:03:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:35,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:35,298 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 20:03:35,317 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 20:03:35,514 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 20:03:35,514 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-03-03 20:03:35,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:35,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226500397] [2022-03-03 20:03:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:35,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:35,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:35,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226500397] [2022-03-03 20:03:35,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226500397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:35,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903807803] [2022-03-03 20:03:35,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:35,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:35,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:35,561 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 20:03:35,562 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 20:03:35,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:35,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:35,691 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 20:03:35,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:35,786 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 20:03:35,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903807803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:35,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:35,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:35,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370563922] [2022-03-03 20:03:35,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:35,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:35,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:35,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:35,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:35,788 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 20:03:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:37,542 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-03-03 20:03:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 20:03:37,543 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 20:03:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:37,550 INFO L225 Difference]: With dead ends: 1794 [2022-03-03 20:03:37,550 INFO L226 Difference]: Without dead ends: 1794 [2022-03-03 20:03:37,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 20:03:37,553 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 487 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:37,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 286 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:03:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-03-03 20:03:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-03-03 20:03:37,571 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 20:03:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-03 20:03:37,572 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-03 20:03:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:37,572 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-03 20:03:37,572 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 20:03:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-03 20:03:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:37,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:37,573 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 20:03:37,601 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 20:03:37,788 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 20:03:37,788 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:37,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-03-03 20:03:37,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:37,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718219795] [2022-03-03 20:03:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:37,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:37,835 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 20:03:37,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:37,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718219795] [2022-03-03 20:03:37,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718219795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:37,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707564767] [2022-03-03 20:03:37,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:37,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:37,837 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 20:03:37,838 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 20:03:37,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:03:37,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:37,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:37,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:37,990 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 20:03:37,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:38,117 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 20:03:38,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707564767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:38,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:38,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:38,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620978898] [2022-03-03 20:03:38,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:38,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:38,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:38,119 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 20:03:39,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:39,081 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-03 20:03:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:03:39,082 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 20:03:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:39,088 INFO L225 Difference]: With dead ends: 1470 [2022-03-03 20:03:39,088 INFO L226 Difference]: Without dead ends: 1470 [2022-03-03 20:03:39,090 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 20:03:39,090 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 20:03:39,090 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 20:03:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-03 20:03:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-03 20:03:39,103 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 20:03:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-03 20:03:39,104 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-03 20:03:39,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:39,104 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-03 20:03:39,104 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 20:03:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-03 20:03:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:39,105 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:39,105 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 20:03:39,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-03 20:03:39,323 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 20:03:39,323 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-03-03 20:03:39,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:39,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125872266] [2022-03-03 20:03:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:39,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:39,353 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 20:03:39,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:39,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125872266] [2022-03-03 20:03:39,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125872266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:39,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185110793] [2022-03-03 20:03:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:39,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:39,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:39,354 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 20:03:39,371 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 20:03:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:03:39,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:39,470 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 20:03:39,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:39,549 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 20:03:39,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185110793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:39,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:39,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 20:03:39,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134843699] [2022-03-03 20:03:39,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:39,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:03:39,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:39,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:03:39,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:03:39,550 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 20:03:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:39,704 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-03 20:03:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:03:39,704 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 20:03:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:39,707 INFO L225 Difference]: With dead ends: 685 [2022-03-03 20:03:39,707 INFO L226 Difference]: Without dead ends: 679 [2022-03-03 20:03:39,707 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 20:03:39,708 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 20:03:39,708 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 20:03:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-03 20:03:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-03 20:03:39,719 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 20:03:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-03 20:03:39,720 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-03 20:03:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:39,720 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-03 20:03:39,720 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 20:03:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-03 20:03:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:39,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:39,721 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] [2022-03-03 20:03:39,753 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 20:03:39,921 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 20:03:39,921 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-03-03 20:03:39,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:39,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008895039] [2022-03-03 20:03:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:39,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:39,961 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 20:03:39,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:39,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008895039] [2022-03-03 20:03:39,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008895039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:39,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784469056] [2022-03-03 20:03:39,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:39,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:39,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:39,975 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 20:03:39,977 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 20:03:39,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:39,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:39,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:40,085 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 20:03:40,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:40,126 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 20:03:40,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784469056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:40,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:40,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 20:03:40,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109932765] [2022-03-03 20:03:40,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:40,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:03:40,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:40,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:03:40,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:40,127 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 20:03:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:40,474 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-03 20:03:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 20:03:40,475 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 20:03:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:40,479 INFO L225 Difference]: With dead ends: 1159 [2022-03-03 20:03:40,479 INFO L226 Difference]: Without dead ends: 1111 [2022-03-03 20:03:40,479 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 20:03:40,480 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 20:03:40,480 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 20:03:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-03 20:03:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-03 20:03:40,494 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 20:03:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-03 20:03:40,496 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-03 20:03:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:40,496 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-03 20:03:40,496 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 20:03:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-03 20:03:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:40,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:40,498 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 20:03:40,516 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 20:03:40,698 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 20:03:40,698 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:40,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-03-03 20:03:40,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:40,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347593286] [2022-03-03 20:03:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:40,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:40,731 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 20:03:40,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:40,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347593286] [2022-03-03 20:03:40,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347593286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:40,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901137479] [2022-03-03 20:03:40,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:40,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:40,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:40,732 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 20:03:40,733 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 20:03:40,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:40,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:03:40,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:40,817 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 20:03:40,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:40,876 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 20:03:40,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901137479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:40,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:40,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 20:03:40,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595462994] [2022-03-03 20:03:40,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:40,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:03:40,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:03:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:03:40,881 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 20:03:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:41,063 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-03 20:03:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:03:41,063 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 20:03:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:41,068 INFO L225 Difference]: With dead ends: 1267 [2022-03-03 20:03:41,068 INFO L226 Difference]: Without dead ends: 1267 [2022-03-03 20:03:41,069 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 20:03:41,073 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 20:03:41,073 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 20:03:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-03 20:03:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-03 20:03:41,093 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 20:03:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-03 20:03:41,095 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-03 20:03:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:41,096 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-03 20:03:41,096 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 20:03:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-03 20:03:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:41,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:41,097 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 20:03:41,116 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 20:03:41,311 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 20:03:41,311 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-03-03 20:03:41,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:41,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245078975] [2022-03-03 20:03:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:41,362 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 20:03:41,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:41,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245078975] [2022-03-03 20:03:41,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245078975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:41,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291572762] [2022-03-03 20:03:41,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:41,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:41,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:41,363 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 20:03:41,364 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 20:03:41,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:41,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:41,464 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 20:03:41,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:41,532 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 20:03:41,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291572762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:41,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:41,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:41,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304595300] [2022-03-03 20:03:41,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:41,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:41,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:41,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:41,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:41,533 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 20:03:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:42,016 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-03 20:03:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:03:42,016 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 20:03:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:42,043 INFO L225 Difference]: With dead ends: 2268 [2022-03-03 20:03:42,043 INFO L226 Difference]: Without dead ends: 2268 [2022-03-03 20:03:42,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 20:03:42,044 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:42,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 168 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-03 20:03:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-03 20:03:42,101 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 20:03:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-03 20:03:42,103 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-03 20:03:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:42,103 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-03 20:03:42,103 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 20:03:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-03 20:03:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:42,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:42,104 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 20:03:42,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-03 20:03:42,318 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 20:03:42,318 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:42,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:42,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-03-03 20:03:42,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:42,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947128013] [2022-03-03 20:03:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:42,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:42,371 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 20:03:42,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:42,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947128013] [2022-03-03 20:03:42,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947128013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:42,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058372919] [2022-03-03 20:03:42,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:42,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:42,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:42,389 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 20:03:42,404 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 20:03:42,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:03:42,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:42,511 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 20:03:42,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:42,580 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 20:03:42,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058372919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:42,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:42,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:42,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338940970] [2022-03-03 20:03:42,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:42,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:42,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:42,581 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 20:03:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:43,149 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-03 20:03:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:03:43,149 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 20:03:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:43,157 INFO L225 Difference]: With dead ends: 2256 [2022-03-03 20:03:43,157 INFO L226 Difference]: Without dead ends: 2256 [2022-03-03 20:03:43,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:03:43,159 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:43,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 163 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-03 20:03:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-03 20:03:43,179 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 20:03:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-03 20:03:43,180 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-03 20:03:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:43,181 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-03 20:03:43,181 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 20:03:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-03 20:03:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:43,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:43,184 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 20:03:43,202 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 20:03:43,399 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 20:03:43,399 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-03-03 20:03:43,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:43,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040366321] [2022-03-03 20:03:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:43,437 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 20:03:43,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:43,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040366321] [2022-03-03 20:03:43,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040366321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:43,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137129226] [2022-03-03 20:03:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:43,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:43,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:43,438 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 20:03:43,439 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 20:03:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:43,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:43,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:43,556 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 20:03:43,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:43,599 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 20:03:43,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137129226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:43,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:43,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 20:03:43,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957510230] [2022-03-03 20:03:43,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:43,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:03:43,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:03:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:03:43,601 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 20:03:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:43,876 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-03 20:03:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 20:03:43,876 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 20:03:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:43,882 INFO L225 Difference]: With dead ends: 1611 [2022-03-03 20:03:43,882 INFO L226 Difference]: Without dead ends: 1611 [2022-03-03 20:03:43,882 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 20:03:43,883 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:43,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 110 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-03 20:03:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-03 20:03:43,897 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 20:03:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-03 20:03:43,899 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-03 20:03:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:43,900 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-03 20:03:43,900 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 20:03:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-03 20:03:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:43,901 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:43,901 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 20:03:43,922 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 20:03:44,122 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 20:03:44,122 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-03-03 20:03:44,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:44,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379124220] [2022-03-03 20:03:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:44,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:44,154 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 20:03:44,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:44,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379124220] [2022-03-03 20:03:44,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379124220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:44,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026102048] [2022-03-03 20:03:44,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:44,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:44,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:44,155 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 20:03:44,160 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 20:03:44,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:44,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:44,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:44,236 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 20:03:44,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:44,297 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 20:03:44,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026102048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:44,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:44,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:44,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731975243] [2022-03-03 20:03:44,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:44,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:44,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:44,298 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 20:03:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:44,787 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-03 20:03:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:03:44,787 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 20:03:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:44,793 INFO L225 Difference]: With dead ends: 2408 [2022-03-03 20:03:44,793 INFO L226 Difference]: Without dead ends: 2404 [2022-03-03 20:03:44,793 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 20:03:44,794 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 20:03:44,794 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 20:03:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-03 20:03:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-03 20:03:44,821 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 20:03:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-03 20:03:44,824 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-03 20:03:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:44,824 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-03 20:03:44,824 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 20:03:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-03 20:03:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:44,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:44,826 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 20:03:44,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:45,042 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 20:03:45,042 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-03-03 20:03:45,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:45,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678397398] [2022-03-03 20:03:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:45,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:45,085 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 20:03:45,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:45,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678397398] [2022-03-03 20:03:45,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678397398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:45,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843343386] [2022-03-03 20:03:45,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:45,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:45,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:45,086 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 20:03:45,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:03:45,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:45,117 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 20:03:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:45,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:45,214 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 20:03:45,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:45,294 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 20:03:45,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843343386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:45,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:45,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:45,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673622305] [2022-03-03 20:03:45,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:45,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:45,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:45,295 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 20:03:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:46,248 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-03 20:03:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 20:03:46,248 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 20:03:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:46,256 INFO L225 Difference]: With dead ends: 3509 [2022-03-03 20:03:46,256 INFO L226 Difference]: Without dead ends: 3509 [2022-03-03 20:03:46,257 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 20:03:46,258 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 526 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 20:03:46,258 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 20:03:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-03 20:03:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-03 20:03:46,292 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 20:03:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-03 20:03:46,294 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-03 20:03:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:46,295 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-03 20:03:46,295 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 20:03:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-03 20:03:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:46,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:46,296 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 20:03:46,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-03 20:03:46,531 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 20:03:46,532 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-03-03 20:03:46,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:46,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497203531] [2022-03-03 20:03:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:46,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:46,572 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 20:03:46,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:46,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497203531] [2022-03-03 20:03:46,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497203531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:46,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261578372] [2022-03-03 20:03:46,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:46,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:46,573 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 20:03:46,575 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 20:03:46,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:46,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:46,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:46,700 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 20:03:46,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:46,783 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 20:03:46,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261578372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:46,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:46,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:46,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258605846] [2022-03-03 20:03:46,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:46,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:46,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:46,785 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 20:03:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:48,037 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-03 20:03:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 20:03:48,037 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 20:03:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:48,045 INFO L225 Difference]: With dead ends: 3211 [2022-03-03 20:03:48,045 INFO L226 Difference]: Without dead ends: 3207 [2022-03-03 20:03:48,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 20:03:48,047 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 20:03:48,047 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 20:03:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-03 20:03:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-03 20:03:48,075 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 20:03:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-03 20:03:48,077 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-03 20:03:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:48,078 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-03 20:03:48,078 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 20:03:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-03 20:03:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:48,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:48,081 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 20:03:48,100 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 20:03:48,298 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 20:03:48,298 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-03-03 20:03:48,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:48,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937349698] [2022-03-03 20:03:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:48,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:48,330 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 20:03:48,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:48,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937349698] [2022-03-03 20:03:48,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937349698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:48,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145830330] [2022-03-03 20:03:48,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:48,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:48,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:48,331 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 20:03:48,342 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 20:03:48,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:03:48,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:48,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:03:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:48,405 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 20:03:48,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:48,440 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 20:03:48,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145830330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:48,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:48,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 20:03:48,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873660312] [2022-03-03 20:03:48,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:48,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 20:03:48,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 20:03:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-03 20:03:48,441 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 20:03:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:48,521 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-03 20:03:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:03:48,522 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 20:03:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:48,525 INFO L225 Difference]: With dead ends: 1333 [2022-03-03 20:03:48,525 INFO L226 Difference]: Without dead ends: 1333 [2022-03-03 20:03:48,525 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 20:03:48,526 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:48,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 51 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:03:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-03 20:03:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-03 20:03:48,539 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 20:03:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-03 20:03:48,542 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-03 20:03:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:48,542 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-03 20:03:48,542 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 20:03:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-03 20:03:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:48,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:48,545 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 20:03:48,569 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 20:03:48,769 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 20:03:48,769 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-03-03 20:03:48,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:48,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575535858] [2022-03-03 20:03:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:48,810 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 20:03:48,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:48,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575535858] [2022-03-03 20:03:48,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575535858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:48,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733174424] [2022-03-03 20:03:48,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:48,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:48,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:48,812 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 20:03:48,813 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 20:03:48,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:48,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:48,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:48,871 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 20:03:48,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:48,904 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 20:03:48,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733174424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:48,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:48,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 20:03:48,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270865164] [2022-03-03 20:03:48,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:48,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:03:48,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:48,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:03:48,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:03:48,907 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 20:03:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:49,243 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-03 20:03:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:03:49,244 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 20:03:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:49,249 INFO L225 Difference]: With dead ends: 2129 [2022-03-03 20:03:49,250 INFO L226 Difference]: Without dead ends: 2129 [2022-03-03 20:03:49,250 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 20:03:49,250 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 20:03:49,250 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 20:03:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-03 20:03:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-03 20:03:49,273 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 20:03:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-03 20:03:49,276 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-03 20:03:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:49,276 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-03 20:03:49,276 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 20:03:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-03 20:03:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:49,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:49,278 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 20:03:49,312 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 20:03:49,512 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 20:03:49,512 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:49,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-03-03 20:03:49,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:49,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618109143] [2022-03-03 20:03:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:49,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:49,549 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 20:03:49,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:49,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618109143] [2022-03-03 20:03:49,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618109143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:49,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212598450] [2022-03-03 20:03:49,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:49,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:49,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:49,551 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 20:03:49,573 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 20:03:49,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:03:49,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:49,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:49,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:49,645 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 20:03:49,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:49,710 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 20:03:49,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212598450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:49,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:49,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:03:49,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708157496] [2022-03-03 20:03:49,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:49,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:03:49,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:03:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:03:49,712 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 20:03:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:50,095 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-03 20:03:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:03:50,096 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 20:03:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:50,102 INFO L225 Difference]: With dead ends: 2262 [2022-03-03 20:03:50,102 INFO L226 Difference]: Without dead ends: 2262 [2022-03-03 20:03:50,102 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 20:03:50,103 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 20:03:50,103 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 20:03:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-03 20:03:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-03 20:03:50,129 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 20:03:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-03 20:03:50,132 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-03 20:03:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:50,132 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-03 20:03:50,132 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 20:03:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-03 20:03:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:50,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:50,134 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] [2022-03-03 20:03:50,150 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 20:03:50,349 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 20:03:50,350 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-03-03 20:03:50,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:50,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716336928] [2022-03-03 20:03:50,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:50,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:50,384 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 20:03:50,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:50,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716336928] [2022-03-03 20:03:50,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716336928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:50,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497311591] [2022-03-03 20:03:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:50,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:50,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:50,386 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 20:03:50,387 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 20:03:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:50,516 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 20:03:50,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:50,555 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 20:03:50,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497311591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:50,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:50,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 20:03:50,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628417350] [2022-03-03 20:03:50,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:50,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:03:50,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:03:50,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:50,557 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 20:03:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:50,767 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-03 20:03:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:03:50,773 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 20:03:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:50,777 INFO L225 Difference]: With dead ends: 1474 [2022-03-03 20:03:50,777 INFO L226 Difference]: Without dead ends: 1464 [2022-03-03 20:03:50,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:03:50,778 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:50,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 154 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-03 20:03:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-03 20:03:50,811 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 20:03:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-03 20:03:50,814 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-03 20:03:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:50,814 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-03 20:03:50,815 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 20:03:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-03 20:03:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:50,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:50,817 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 20:03:50,835 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 20:03:51,035 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 20:03:51,035 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-03-03 20:03:51,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:51,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451790110] [2022-03-03 20:03:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:51,068 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 20:03:51,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:51,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451790110] [2022-03-03 20:03:51,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451790110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:51,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44422105] [2022-03-03 20:03:51,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:51,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:51,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:51,070 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 20:03:51,071 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 20:03:51,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:51,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:51,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:51,141 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 20:03:51,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:51,185 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 20:03:51,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44422105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:51,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:51,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:03:51,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137968986] [2022-03-03 20:03:51,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:51,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:03:51,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:51,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:03:51,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:03:51,186 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 20:03:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:51,430 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-03 20:03:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 20:03:51,431 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 20:03:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:51,450 INFO L225 Difference]: With dead ends: 2318 [2022-03-03 20:03:51,451 INFO L226 Difference]: Without dead ends: 2314 [2022-03-03 20:03:51,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:03:51,451 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 20:03:51,451 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 20:03:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-03 20:03:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-03 20:03:51,474 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 20:03:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-03 20:03:51,476 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-03 20:03:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:51,477 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-03 20:03:51,477 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 20:03:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-03 20:03:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:51,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:51,479 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 20:03:51,513 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 20:03:51,691 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 20:03:51,691 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-03-03 20:03:51,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:51,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060088418] [2022-03-03 20:03:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:51,730 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 20:03:51,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:51,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060088418] [2022-03-03 20:03:51,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060088418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:51,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586878176] [2022-03-03 20:03:51,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:51,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:51,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:51,732 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 20:03:51,732 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 20:03:51,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:03:51,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:51,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:51,806 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 20:03:51,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:51,860 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 20:03:51,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586878176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:51,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:51,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 20:03:51,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672367709] [2022-03-03 20:03:51,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:51,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:03:51,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:03:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:03:51,861 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 20:03:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:52,187 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-03 20:03:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 20:03:52,187 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 20:03:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:52,192 INFO L225 Difference]: With dead ends: 2302 [2022-03-03 20:03:52,192 INFO L226 Difference]: Without dead ends: 2290 [2022-03-03 20:03:52,193 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 20:03:52,193 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:52,193 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 20:03:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-03 20:03:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-03 20:03:52,214 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 20:03:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-03 20:03:52,216 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-03 20:03:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:52,216 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-03 20:03:52,216 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 20:03:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-03 20:03:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:52,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:52,219 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 20:03:52,235 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 20:03:52,428 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 20:03:52,429 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-03-03 20:03:52,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:52,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585363595] [2022-03-03 20:03:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:52,484 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 20:03:52,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:52,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585363595] [2022-03-03 20:03:52,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585363595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:52,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502092546] [2022-03-03 20:03:52,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:52,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:52,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:52,486 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 20:03:52,487 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 20:03:52,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:52,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:52,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:52,613 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 20:03:52,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:52,690 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 20:03:52,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502092546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:52,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:52,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:52,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395824957] [2022-03-03 20:03:52,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:52,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:52,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:52,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:52,691 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 20:03:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:53,454 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-03 20:03:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:03:53,454 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 20:03:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:53,472 INFO L225 Difference]: With dead ends: 4760 [2022-03-03 20:03:53,473 INFO L226 Difference]: Without dead ends: 4760 [2022-03-03 20:03:53,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:03:53,474 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 475 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 20:03:53,474 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 20:03:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-03 20:03:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-03 20:03:53,524 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 20:03:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-03 20:03:53,527 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-03 20:03:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:53,528 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-03 20:03:53,528 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 20:03:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-03 20:03:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:53,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:53,530 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 20:03:53,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:53,743 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 20:03:53,743 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-03-03 20:03:53,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:53,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244052764] [2022-03-03 20:03:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:53,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:53,790 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 20:03:53,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:53,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244052764] [2022-03-03 20:03:53,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244052764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:53,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045589470] [2022-03-03 20:03:53,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:53,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:53,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:53,792 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 20:03:53,793 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 20:03:53,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:53,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:53,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:53,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:53,939 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 20:03:53,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:54,053 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 20:03:54,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045589470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:54,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:54,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:54,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261735803] [2022-03-03 20:03:54,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:54,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:54,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:54,055 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 20:03:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:54,798 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-03 20:03:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:03:54,798 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 20:03:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:54,808 INFO L225 Difference]: With dead ends: 4260 [2022-03-03 20:03:54,808 INFO L226 Difference]: Without dead ends: 4260 [2022-03-03 20:03:54,809 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 20:03:54,809 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 20:03:54,810 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 20:03:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-03 20:03:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-03 20:03:54,848 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 20:03:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-03 20:03:54,851 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-03 20:03:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:54,851 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-03 20:03:54,851 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 20:03:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-03 20:03:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:54,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:54,856 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 20:03:54,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-03 20:03:55,072 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 20:03:55,072 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-03-03 20:03:55,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:55,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778359341] [2022-03-03 20:03:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:55,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:55,112 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 20:03:55,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:55,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778359341] [2022-03-03 20:03:55,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778359341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:55,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457987429] [2022-03-03 20:03:55,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:55,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:55,113 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 20:03:55,114 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 20:03:55,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:03:55,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:55,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:55,220 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 20:03:55,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:55,301 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 20:03:55,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457987429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:55,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:55,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 20:03:55,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607438297] [2022-03-03 20:03:55,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:55,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:03:55,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:55,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:03:55,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:03:55,306 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 20:03:55,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:55,971 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-03 20:03:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 20:03:55,971 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 20:03:55,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:55,980 INFO L225 Difference]: With dead ends: 4602 [2022-03-03 20:03:55,980 INFO L226 Difference]: Without dead ends: 4602 [2022-03-03 20:03:55,981 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 20:03:55,981 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 20:03:55,981 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 20:03:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-03 20:03:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-03 20:03:56,050 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 20:03:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-03 20:03:56,054 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-03 20:03:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:56,054 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-03 20:03:56,055 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 20:03:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-03 20:03:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:56,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:56,057 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 20:03:56,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:56,271 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 20:03:56,271 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:56,272 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-03-03 20:03:56,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:56,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427611143] [2022-03-03 20:03:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:56,312 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 20:03:56,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:56,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427611143] [2022-03-03 20:03:56,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427611143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:56,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234859428] [2022-03-03 20:03:56,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:56,313 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 20:03:56,314 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 20:03:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:56,414 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 20:03:56,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:56,482 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 20:03:56,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234859428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:56,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:56,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 20:03:56,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697735726] [2022-03-03 20:03:56,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:56,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:03:56,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:03:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:03:56,484 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 20:03:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:57,081 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-03 20:03:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:03:57,081 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 20:03:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:57,091 INFO L225 Difference]: With dead ends: 4348 [2022-03-03 20:03:57,091 INFO L226 Difference]: Without dead ends: 4344 [2022-03-03 20:03:57,091 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 20:03:57,092 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 20:03:57,092 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 20:03:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-03 20:03:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-03 20:03:57,152 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 20:03:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 20:03:57,155 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 20:03:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:57,156 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 20:03:57,156 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 20:03:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 20:03:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:57,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:57,158 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 20:03:57,175 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 20:03:57,371 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 20:03:57,371 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-03-03 20:03:57,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:57,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479040586] [2022-03-03 20:03:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:57,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:57,405 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 20:03:57,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:57,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479040586] [2022-03-03 20:03:57,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479040586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:57,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775674985] [2022-03-03 20:03:57,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:57,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:57,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:57,407 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 20:03:57,408 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 20:03:57,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:57,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:57,521 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 20:03:57,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:57,600 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 20:03:57,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775674985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:57,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:57,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:57,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138290588] [2022-03-03 20:03:57,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:57,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:57,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:57,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:57,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:57,601 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 20:03:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:58,222 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-03 20:03:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:03:58,222 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 20:03:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:58,230 INFO L225 Difference]: With dead ends: 4035 [2022-03-03 20:03:58,230 INFO L226 Difference]: Without dead ends: 4035 [2022-03-03 20:03:58,230 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 20:03:58,231 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 20:03:58,231 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 20:03:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-03 20:03:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-03 20:03:58,265 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 20:03:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-03 20:03:58,268 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-03 20:03:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:58,268 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-03 20:03:58,268 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 20:03:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-03 20:03:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:58,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:58,271 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 20:03:58,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-03 20:03:58,471 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 20:03:58,471 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-03-03 20:03:58,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:58,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659463924] [2022-03-03 20:03:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:58,509 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 20:03:58,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:58,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659463924] [2022-03-03 20:03:58,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659463924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:58,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801549489] [2022-03-03 20:03:58,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:58,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:58,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:58,511 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 20:03:58,512 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 20:03:58,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:03:58,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:58,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:58,617 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 20:03:58,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:58,680 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 20:03:58,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801549489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:58,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:58,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:58,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974658177] [2022-03-03 20:03:58,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:58,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:58,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:58,681 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 20:03:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:59,354 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-03 20:03:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:03:59,354 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 20:03:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:59,362 INFO L225 Difference]: With dead ends: 3794 [2022-03-03 20:03:59,362 INFO L226 Difference]: Without dead ends: 3790 [2022-03-03 20:03:59,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:03:59,363 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 407 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 20:03:59,363 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 20:03:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-03 20:03:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-03 20:03:59,401 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 20:03:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 20:03:59,404 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 20:03:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:59,404 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 20:03:59,405 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 20:03:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 20:03:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:59,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:59,407 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 20:03:59,424 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 20:03:59,615 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 20:03:59,615 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-03-03 20:03:59,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:59,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125469946] [2022-03-03 20:03:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:59,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:59,658 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 20:03:59,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:59,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125469946] [2022-03-03 20:03:59,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125469946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:59,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693477699] [2022-03-03 20:03:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:59,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:59,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:59,660 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 20:03:59,661 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 20:03:59,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:59,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:59,757 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 20:03:59,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:59,823 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 20:03:59,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693477699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:59,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:59,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:59,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476358561] [2022-03-03 20:03:59,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:59,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:59,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:59,824 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 20:04:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:00,471 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-03 20:04:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:04:00,471 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 20:04:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:00,478 INFO L225 Difference]: With dead ends: 3978 [2022-03-03 20:04:00,479 INFO L226 Difference]: Without dead ends: 3978 [2022-03-03 20:04:00,479 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 20:04:00,479 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 20:04:00,480 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 20:04:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-03 20:04:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-03 20:04:00,512 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 20:04:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-03 20:04:00,516 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-03 20:04:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:00,516 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-03 20:04:00,516 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 20:04:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-03 20:04:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:00,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:00,519 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 20:04:00,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 20:04:00,735 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 20:04:00,735 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-03-03 20:04:00,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:00,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188678993] [2022-03-03 20:04:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:00,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:00,773 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 20:04:00,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:00,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188678993] [2022-03-03 20:04:00,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188678993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:00,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24291587] [2022-03-03 20:04:00,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:00,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:00,775 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 20:04:00,776 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 20:04:00,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:00,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:00,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:00,856 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 20:04:00,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:00,920 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 20:04:00,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24291587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:00,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:00,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:04:00,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747355880] [2022-03-03 20:04:00,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:00,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:04:00,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:04:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:04:00,921 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 20:04:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:01,421 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-03 20:04:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:04:01,422 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 20:04:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:01,428 INFO L225 Difference]: With dead ends: 3706 [2022-03-03 20:04:01,428 INFO L226 Difference]: Without dead ends: 3702 [2022-03-03 20:04:01,429 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 20:04:01,429 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 20:04:01,430 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 20:04:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-03 20:04:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-03 20:04:01,472 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 20:04:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-03 20:04:01,475 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-03 20:04:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:01,475 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-03 20:04:01,475 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 20:04:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-03 20:04:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:01,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:01,478 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 20:04:01,506 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 20:04:01,691 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 20:04:01,691 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-03-03 20:04:01,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:01,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180889119] [2022-03-03 20:04:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:01,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:01,729 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 20:04:01,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:01,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180889119] [2022-03-03 20:04:01,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180889119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:01,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628024768] [2022-03-03 20:04:01,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:04:01,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:01,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:01,731 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 20:04:01,733 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 20:04:01,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:04:01,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:01,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:01,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:01,824 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 20:04:01,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:01,894 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 20:04:01,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628024768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:01,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:01,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:04:01,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836776854] [2022-03-03 20:04:01,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:01,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:04:01,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:04:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:04:01,895 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 20:04:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:02,406 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-03 20:04:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:04:02,406 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 20:04:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:02,414 INFO L225 Difference]: With dead ends: 4114 [2022-03-03 20:04:02,414 INFO L226 Difference]: Without dead ends: 4102 [2022-03-03 20:04:02,414 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 20:04:02,415 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:02,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 195 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-03 20:04:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-03 20:04:02,461 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 20:04:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-03 20:04:02,465 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-03 20:04:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:02,465 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-03 20:04:02,465 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 20:04:02,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-03 20:04:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:02,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:02,469 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 20:04:02,486 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 20:04:02,683 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 20:04:02,683 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-03-03 20:04:02,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:02,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723527961] [2022-03-03 20:04:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:02,748 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 20:04:02,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:02,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723527961] [2022-03-03 20:04:02,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723527961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:02,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972364707] [2022-03-03 20:04:02,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:04:02,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:02,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:02,749 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 20:04:02,755 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 20:04:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:02,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:02,830 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 20:04:02,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:02,881 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 20:04:02,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972364707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:02,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:02,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:04:02,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587610533] [2022-03-03 20:04:02,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:02,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:04:02,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:04:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:04:02,882 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 20:04:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:03,315 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-03 20:04:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:04:03,315 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 20:04:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:03,321 INFO L225 Difference]: With dead ends: 3694 [2022-03-03 20:04:03,321 INFO L226 Difference]: Without dead ends: 3694 [2022-03-03 20:04:03,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:04:03,322 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 377 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:03,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 283 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-03 20:04:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-03 20:04:03,354 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 20:04:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-03 20:04:03,373 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-03 20:04:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:03,373 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-03 20:04:03,373 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 20:04:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-03 20:04:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:03,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:03,376 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 20:04:03,392 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 20:04:03,587 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 20:04:03,587 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-03-03 20:04:03,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:03,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628803250] [2022-03-03 20:04:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:03,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:03,627 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 20:04:03,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:03,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628803250] [2022-03-03 20:04:03,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628803250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:03,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622596819] [2022-03-03 20:04:03,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:04:03,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:03,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:03,629 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 20:04:03,630 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 20:04:03,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:04:03,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:03,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:03,698 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 20:04:03,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:03,748 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 20:04:03,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622596819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:03,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:03,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:04:03,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188734740] [2022-03-03 20:04:03,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:03,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:04:03,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:03,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:04:03,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:04:03,749 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 20:04:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:04,287 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-03 20:04:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:04:04,288 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 20:04:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:04,294 INFO L225 Difference]: With dead ends: 3420 [2022-03-03 20:04:04,294 INFO L226 Difference]: Without dead ends: 3416 [2022-03-03 20:04:04,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:04:04,295 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:04,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 194 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-03 20:04:04,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-03 20:04:04,327 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 20:04:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-03 20:04:04,330 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-03 20:04:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:04,330 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-03 20:04:04,330 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 20:04:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-03 20:04:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:04,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:04,333 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 20:04:04,349 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 20:04:04,547 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 20:04:04,548 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-03-03 20:04:04,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:04,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744753929] [2022-03-03 20:04:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:04,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:04,594 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 20:04:04,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:04,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744753929] [2022-03-03 20:04:04,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744753929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:04,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122356511] [2022-03-03 20:04:04,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:04:04,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:04,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:04,595 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 20:04:04,596 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 20:04:04,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:04:04,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:04,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:04,687 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 20:04:04,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:04,730 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 20:04:04,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122356511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:04,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:04,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 20:04:04,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347932562] [2022-03-03 20:04:04,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:04,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:04:04,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:04:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:04:04,731 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 20:04:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:05,238 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-03 20:04:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:04:05,238 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 20:04:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:05,243 INFO L225 Difference]: With dead ends: 3256 [2022-03-03 20:04:05,243 INFO L226 Difference]: Without dead ends: 3244 [2022-03-03 20:04:05,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:04:05,245 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:05,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 209 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-03 20:04:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-03 20:04:05,285 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 20:04:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-03 20:04:05,288 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-03 20:04:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:05,288 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-03 20:04:05,294 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 20:04:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-03 20:04:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:05,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:05,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:05,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:05,511 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 20:04:05,512 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-03-03 20:04:05,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:05,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767462026] [2022-03-03 20:04:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:05,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:05,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:05,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767462026] [2022-03-03 20:04:05,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767462026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:05,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782501553] [2022-03-03 20:04:05,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:04:05,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:05,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:05,952 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 20:04:05,953 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 20:04:05,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:04:05,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:04:05,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:06,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:06,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:06,458 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 20:04:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:06,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:07,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:07,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:07,052 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 20:04:08,102 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 20:04:08,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782501553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:08,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:08,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:04:08,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411758923] [2022-03-03 20:04:08,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:08,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:04:08,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:04:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:04:08,104 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 20:04:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:12,450 INFO L93 Difference]: Finished difference Result 4082 states and 13028 transitions. [2022-03-03 20:04:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:04:12,450 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 20:04:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:12,459 INFO L225 Difference]: With dead ends: 4082 [2022-03-03 20:04:12,459 INFO L226 Difference]: Without dead ends: 4022 [2022-03-03 20:04:12,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=906, Invalid=3650, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:04:12,460 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:12,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 322 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:04:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2022-03-03 20:04:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 1792. [2022-03-03 20:04:12,498 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 20:04:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-03-03 20:04:12,502 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-03-03 20:04:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:12,502 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-03-03 20:04:12,502 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 20:04:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-03-03 20:04:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:12,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:12,505 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 20:04:12,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:12,716 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 20:04:12,716 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-03-03 20:04:12,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:12,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447055414] [2022-03-03 20:04:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:12,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:13,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:13,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447055414] [2022-03-03 20:04:13,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447055414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:13,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127924840] [2022-03-03 20:04:13,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:13,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:13,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:13,105 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 20:04:13,107 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 20:04:13,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:13,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:13,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:04:13,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:13,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:13,569 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 20:04:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:13,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:14,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:14,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:14,222 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 20:04:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:15,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127924840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:15,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:15,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:04:15,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040953657] [2022-03-03 20:04:15,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:15,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:15,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:15,363 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 20:04:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:19,459 INFO L93 Difference]: Finished difference Result 4155 states and 13266 transitions. [2022-03-03 20:04:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:04:19,460 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 20:04:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:19,467 INFO L225 Difference]: With dead ends: 4155 [2022-03-03 20:04:19,467 INFO L226 Difference]: Without dead ends: 4125 [2022-03-03 20:04:19,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 20:04:19,468 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:19,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 351 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1322 Invalid, 0 Unknown, 71 Unchecked, 0.8s Time] [2022-03-03 20:04:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2022-03-03 20:04:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 1818. [2022-03-03 20:04:19,529 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 20:04:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6511 transitions. [2022-03-03 20:04:19,533 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6511 transitions. Word has length 26 [2022-03-03 20:04:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:19,533 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6511 transitions. [2022-03-03 20:04:19,533 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 20:04:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6511 transitions. [2022-03-03 20:04:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:19,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:19,536 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 20:04:19,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:19,752 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 20:04:19,752 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-03-03 20:04:19,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:19,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086803467] [2022-03-03 20:04:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:20,188 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 20:04:20,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:20,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086803467] [2022-03-03 20:04:20,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086803467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:20,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389539351] [2022-03-03 20:04:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:04:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:20,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:20,189 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 20:04:20,190 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 20:04:20,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:04:20,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:20,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:04:20,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:20,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:20,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:20,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:20,825 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 20:04:20,931 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 20:04:20,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:21,489 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:04:21,490 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 20:04:22,004 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 20:04:22,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389539351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:22,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:22,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:04:22,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197988876] [2022-03-03 20:04:22,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:22,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:04:22,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:04:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:04:22,006 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 20:04:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:27,866 INFO L93 Difference]: Finished difference Result 3781 states and 12664 transitions. [2022-03-03 20:04:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 20:04:27,866 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 20:04:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:27,873 INFO L225 Difference]: With dead ends: 3781 [2022-03-03 20:04:27,874 INFO L226 Difference]: Without dead ends: 3751 [2022-03-03 20:04:27,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1171, Invalid=7019, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 20:04:27,875 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 20:04:27,875 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 20:04:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-03-03 20:04:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 1891. [2022-03-03 20:04:27,910 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 20:04:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 6763 transitions. [2022-03-03 20:04:27,914 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 6763 transitions. Word has length 26 [2022-03-03 20:04:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:27,915 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 6763 transitions. [2022-03-03 20:04:27,915 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 20:04:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 6763 transitions. [2022-03-03 20:04:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:27,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:27,918 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 20:04:27,947 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 20:04:28,134 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 20:04:28,135 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:28,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 6 times [2022-03-03 20:04:28,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:28,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323922260] [2022-03-03 20:04:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:28,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:28,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:28,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323922260] [2022-03-03 20:04:28,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323922260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:28,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288750195] [2022-03-03 20:04:28,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:04:28,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:28,628 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 20:04:28,629 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 20:04:28,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:04:28,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:28,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:04:28,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:29,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:29,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:29,131 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 20:04:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:29,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:30,002 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:04:30,003 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 20:04:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:31,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288750195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:31,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:31,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:04:31,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941764824] [2022-03-03 20:04:31,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:31,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:31,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:31,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:31,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:31,137 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 20:04:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:38,928 INFO L93 Difference]: Finished difference Result 4670 states and 14888 transitions. [2022-03-03 20:04:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 20:04:38,928 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 20:04:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:38,937 INFO L225 Difference]: With dead ends: 4670 [2022-03-03 20:04:38,937 INFO L226 Difference]: Without dead ends: 4610 [2022-03-03 20:04:38,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1236, Invalid=7884, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 20:04:38,938 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 503 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 3308 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:38,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 711 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3308 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 20:04:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2022-03-03 20:04:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 1942. [2022-03-03 20:04:38,981 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 20:04:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6936 transitions. [2022-03-03 20:04:38,985 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6936 transitions. Word has length 26 [2022-03-03 20:04:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:38,985 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6936 transitions. [2022-03-03 20:04:38,985 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 20:04:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6936 transitions. [2022-03-03 20:04:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:38,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:38,989 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 20:04:39,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:39,203 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 20:04:39,203 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-03-03 20:04:39,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:39,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125421915] [2022-03-03 20:04:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:39,584 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 20:04:39,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:39,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125421915] [2022-03-03 20:04:39,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125421915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:39,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136700728] [2022-03-03 20:04:39,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:39,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:39,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:39,586 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 20:04:39,587 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 20:04:39,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:39,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:39,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:04:39,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:40,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:40,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:40,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:40,211 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 20:04:40,317 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 20:04:40,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:40,821 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:04:40,821 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 20:04:41,496 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 20:04:41,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136700728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:41,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:41,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:04:41,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136394947] [2022-03-03 20:04:41,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:41,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:04:41,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:04:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:04:41,497 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 20:04:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:49,219 INFO L93 Difference]: Finished difference Result 4808 states and 15717 transitions. [2022-03-03 20:04:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-03 20:04:49,219 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 20:04:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:49,227 INFO L225 Difference]: With dead ends: 4808 [2022-03-03 20:04:49,228 INFO L226 Difference]: Without dead ends: 4746 [2022-03-03 20:04:49,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2152, Invalid=11420, Unknown=0, NotChecked=0, Total=13572 [2022-03-03 20:04:49,228 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 485 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:49,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 624 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:04:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2022-03-03 20:04:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 1983. [2022-03-03 20:04:49,270 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 20:04:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 7083 transitions. [2022-03-03 20:04:49,274 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 7083 transitions. Word has length 26 [2022-03-03 20:04:49,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:49,274 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 7083 transitions. [2022-03-03 20:04:49,274 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 20:04:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 7083 transitions. [2022-03-03 20:04:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:49,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:49,278 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 20:04:49,309 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 20:04:49,494 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 20:04:49,494 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-03-03 20:04:49,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:49,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828945054] [2022-03-03 20:04:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:49,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:49,795 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 20:04:49,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:49,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828945054] [2022-03-03 20:04:49,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828945054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:49,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081162051] [2022-03-03 20:04:49,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:04:49,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:49,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:49,796 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 20:04:49,797 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 20:04:49,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:04:49,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:49,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:04:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:50,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:50,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:50,192 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 20:04:50,322 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 20:04:50,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:50,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:50,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:50,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:50,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:50,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:04:51,095 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 20:04:51,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081162051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:51,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:51,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 20:04:51,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257054228] [2022-03-03 20:04:51,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:51,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:04:51,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:04:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:04:51,098 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 20:04:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:58,013 INFO L93 Difference]: Finished difference Result 5095 states and 16333 transitions. [2022-03-03 20:04:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 20:04:58,015 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 20:04:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:58,025 INFO L225 Difference]: With dead ends: 5095 [2022-03-03 20:04:58,025 INFO L226 Difference]: Without dead ends: 5050 [2022-03-03 20:04:58,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1396, Invalid=7160, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 20:04:58,028 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 687 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:58,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 553 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:04:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2022-03-03 20:04:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 2249. [2022-03-03 20:04:58,084 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 20:04:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 7954 transitions. [2022-03-03 20:04:58,089 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 7954 transitions. Word has length 26 [2022-03-03 20:04:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:58,089 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 7954 transitions. [2022-03-03 20:04:58,089 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 20:04:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 7954 transitions. [2022-03-03 20:04:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:58,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:58,093 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 20:04:58,111 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 20:04:58,298 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 20:04:58,298 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:58,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:58,299 INFO L85 PathProgramCache]: Analyzing trace with hash 296771640, now seen corresponding path program 7 times [2022-03-03 20:04:58,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:58,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396404454] [2022-03-03 20:04:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:58,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:58,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:58,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396404454] [2022-03-03 20:04:58,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396404454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:58,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569012269] [2022-03-03 20:04:58,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:04:58,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:58,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:58,606 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 20:04:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:58,631 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 20:04:58,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:04:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:59,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:59,153 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 20:04:59,267 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 20:04:59,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:59,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:59,744 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 20:05:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:01,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569012269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:01,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:01,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:05:01,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096175140] [2022-03-03 20:05:01,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:01,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:05:01,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:01,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:05:01,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:05:01,155 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 20:05:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:04,909 INFO L93 Difference]: Finished difference Result 4792 states and 15350 transitions. [2022-03-03 20:05:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:05:04,909 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 20:05:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:04,918 INFO L225 Difference]: With dead ends: 4792 [2022-03-03 20:05:04,918 INFO L226 Difference]: Without dead ends: 4747 [2022-03-03 20:05:04,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=912, Invalid=3644, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:05:04,919 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:04,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 342 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:05:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-03-03 20:05:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 2277. [2022-03-03 20:05:04,962 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 20:05:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 8044 transitions. [2022-03-03 20:05:04,967 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 8044 transitions. Word has length 26 [2022-03-03 20:05:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:04,967 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 8044 transitions. [2022-03-03 20:05:04,967 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 20:05:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 8044 transitions. [2022-03-03 20:05:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:04,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:04,982 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 20:05:04,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 20:05:05,195 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 20:05:05,195 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:05,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:05,196 INFO L85 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 8 times [2022-03-03 20:05:05,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:05,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403153172] [2022-03-03 20:05:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:05,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:05,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:05,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403153172] [2022-03-03 20:05:05,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403153172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:05,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705071308] [2022-03-03 20:05:05,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:05:05,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:05,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:05,425 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 20:05:05,425 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 20:05:05,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:05:05,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:05:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:05,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:05,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:05,810 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 20:05:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:06,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:06,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:06,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:06,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:06,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:05:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:07,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705071308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:07,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:07,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:05:07,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523896489] [2022-03-03 20:05:07,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:07,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:05:07,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:05:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:05:07,370 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 20:05:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:17,555 INFO L93 Difference]: Finished difference Result 5580 states and 17964 transitions. [2022-03-03 20:05:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-03 20:05:17,555 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 20:05:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:17,564 INFO L225 Difference]: With dead ends: 5580 [2022-03-03 20:05:17,564 INFO L226 Difference]: Without dead ends: 5535 [2022-03-03 20:05:17,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5077 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2249, Invalid=11557, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 20:05:17,565 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 702 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:17,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 839 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2380 Invalid, 0 Unknown, 577 Unchecked, 1.3s Time] [2022-03-03 20:05:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2022-03-03 20:05:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 2346. [2022-03-03 20:05:17,611 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 20:05:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 8295 transitions. [2022-03-03 20:05:17,616 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 8295 transitions. Word has length 26 [2022-03-03 20:05:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:17,616 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 8295 transitions. [2022-03-03 20:05:17,616 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 20:05:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 8295 transitions. [2022-03-03 20:05:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:17,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:17,620 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 20:05:17,636 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 20:05:17,830 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 20:05:17,831 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:17,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:17,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1377789112, now seen corresponding path program 9 times [2022-03-03 20:05:17,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:17,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251905137] [2022-03-03 20:05:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:18,280 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 20:05:18,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:18,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251905137] [2022-03-03 20:05:18,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251905137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:18,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131927208] [2022-03-03 20:05:18,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:05:18,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:18,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:18,282 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 20:05:18,284 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 20:05:18,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:05:18,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:18,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:05:18,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:18,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:18,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:05:18,834 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 20:05:18,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:19,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:19,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:19,291 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 20:05:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:20,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131927208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:20,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:20,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:05:20,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129874870] [2022-03-03 20:05:20,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:20,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:05:20,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:05:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:05:20,477 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 20:05:25,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:25,035 INFO L93 Difference]: Finished difference Result 4913 states and 15799 transitions. [2022-03-03 20:05:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:05:25,036 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 20:05:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:25,046 INFO L225 Difference]: With dead ends: 4913 [2022-03-03 20:05:25,046 INFO L226 Difference]: Without dead ends: 4891 [2022-03-03 20:05:25,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=963, Invalid=4149, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:05:25,047 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 451 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 20:05:25,047 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 20:05:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2022-03-03 20:05:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 2334. [2022-03-03 20:05:25,097 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 20:05:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 8271 transitions. [2022-03-03 20:05:25,102 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 8271 transitions. Word has length 26 [2022-03-03 20:05:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:25,102 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 8271 transitions. [2022-03-03 20:05:25,102 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 20:05:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 8271 transitions. [2022-03-03 20:05:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:25,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:25,107 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 20:05:25,122 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 20:05:25,322 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 20:05:25,322 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:25,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:25,323 INFO L85 PathProgramCache]: Analyzing trace with hash -116118610, now seen corresponding path program 10 times [2022-03-03 20:05:25,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:25,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705344762] [2022-03-03 20:05:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:25,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:25,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:25,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705344762] [2022-03-03 20:05:25,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705344762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:25,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112700864] [2022-03-03 20:05:25,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:05:25,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:25,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:25,815 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 20:05:25,815 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 20:05:25,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:05:25,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:25,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:05:25,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:26,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:26,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:26,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:05:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:26,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:27,312 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:05:27,312 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 20:05:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:28,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112700864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:28,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:28,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:05:28,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570384959] [2022-03-03 20:05:28,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:28,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:05:28,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:05:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:05:28,331 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 20:05:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:33,728 INFO L93 Difference]: Finished difference Result 4804 states and 15568 transitions. [2022-03-03 20:05:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 20:05:33,728 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 20:05:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:33,738 INFO L225 Difference]: With dead ends: 4804 [2022-03-03 20:05:33,739 INFO L226 Difference]: Without dead ends: 4767 [2022-03-03 20:05:33,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2309 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1007, Invalid=6475, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 20:05:33,740 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 379 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:33,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 492 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:05:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2022-03-03 20:05:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 2321. [2022-03-03 20:05:33,803 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 20:05:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 8233 transitions. [2022-03-03 20:05:33,808 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 8233 transitions. Word has length 26 [2022-03-03 20:05:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:33,808 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 8233 transitions. [2022-03-03 20:05:33,808 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 20:05:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 8233 transitions. [2022-03-03 20:05:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:33,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:33,812 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 20:05:33,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-03 20:05:34,017 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 20:05:34,017 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 11 times [2022-03-03 20:05:34,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:34,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623222353] [2022-03-03 20:05:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:34,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:34,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623222353] [2022-03-03 20:05:34,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623222353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:34,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920569718] [2022-03-03 20:05:34,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:05:34,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:34,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:34,258 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 20:05:34,299 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 20:05:34,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:05:34,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:34,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:05:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:34,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:34,807 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 20:05:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:35,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:35,674 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:05:35,674 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 20:05:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:36,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920569718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:36,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:36,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:05:36,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388924597] [2022-03-03 20:05:36,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:36,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:05:36,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:05:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:05:36,797 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 20:05:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:43,847 INFO L93 Difference]: Finished difference Result 5403 states and 17456 transitions. [2022-03-03 20:05:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 20:05:43,847 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 20:05:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:43,857 INFO L225 Difference]: With dead ends: 5403 [2022-03-03 20:05:43,857 INFO L226 Difference]: Without dead ends: 5316 [2022-03-03 20:05:43,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1663, Invalid=10547, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 20:05:43,858 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 545 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:43,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 566 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:05:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-03-03 20:05:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2361. [2022-03-03 20:05:43,907 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 20:05:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 8374 transitions. [2022-03-03 20:05:43,912 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 8374 transitions. Word has length 26 [2022-03-03 20:05:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:43,912 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 8374 transitions. [2022-03-03 20:05:43,912 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 20:05:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 8374 transitions. [2022-03-03 20:05:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:43,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:43,916 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 20:05:43,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-03 20:05:44,127 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 20:05:44,127 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 338936652, now seen corresponding path program 37 times [2022-03-03 20:05:44,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:44,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488634890] [2022-03-03 20:05:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:44,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:44,410 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 20:05:44,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:44,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488634890] [2022-03-03 20:05:44,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488634890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:44,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085467502] [2022-03-03 20:05:44,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:05:44,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:44,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:44,412 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 20:05:44,427 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 20:05:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:44,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:05:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:44,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:44,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:45,000 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 20:05:45,120 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 20:05:45,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:45,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:45,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:45,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:45,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:45,511 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 20:05:45,965 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 20:05:45,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085467502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:45,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:45,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 20:05:45,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389195479] [2022-03-03 20:05:45,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:45,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:05:45,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:05:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:05:45,966 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 20:05:53,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:53,656 INFO L93 Difference]: Finished difference Result 6053 states and 19484 transitions. [2022-03-03 20:05:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 20:05:53,656 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 20:05:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:53,685 INFO L225 Difference]: With dead ends: 6053 [2022-03-03 20:05:53,685 INFO L226 Difference]: Without dead ends: 5972 [2022-03-03 20:05:53,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1822, Invalid=8278, Unknown=0, NotChecked=0, Total=10100 [2022-03-03 20:05:53,686 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 600 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:53,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 534 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:05:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2022-03-03 20:05:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 2450. [2022-03-03 20:05:53,758 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 20:05:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 8750 transitions. [2022-03-03 20:05:53,764 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 8750 transitions. Word has length 26 [2022-03-03 20:05:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:53,764 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 8750 transitions. [2022-03-03 20:05:53,764 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 20:05:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 8750 transitions. [2022-03-03 20:05:53,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:53,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:53,769 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 20:05:53,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 20:05:53,971 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 20:05:53,972 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1541249020, now seen corresponding path program 38 times [2022-03-03 20:05:53,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:53,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644287782] [2022-03-03 20:05:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:53,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:54,274 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 20:05:54,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:54,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644287782] [2022-03-03 20:05:54,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644287782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:54,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095900985] [2022-03-03 20:05:54,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:05:54,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:54,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:54,276 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 20:05:54,277 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 20:05:54,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:05:54,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:54,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:05:54,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:54,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:54,780 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 20:05:56,845 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 20:05:56,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:57,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:57,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:57,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:57,625 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 20:05:58,015 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 20:05:58,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095900985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:58,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:58,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-03-03 20:05:58,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172425205] [2022-03-03 20:05:58,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:58,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 20:05:58,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 20:05:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-03-03 20:05:58,016 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 20:06:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:19,512 INFO L93 Difference]: Finished difference Result 10188 states and 33160 transitions. [2022-03-03 20:06:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-03-03 20:06:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:06:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:19,532 INFO L225 Difference]: With dead ends: 10188 [2022-03-03 20:06:19,532 INFO L226 Difference]: Without dead ends: 10102 [2022-03-03 20:06:19,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28138 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=8934, Invalid=54318, Unknown=0, NotChecked=0, Total=63252 [2022-03-03 20:06:19,535 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1054 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:19,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1039 Invalid, 6178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2633 Invalid, 0 Unknown, 3382 Unchecked, 1.6s Time] [2022-03-03 20:06:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10102 states. [2022-03-03 20:06:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10102 to 2531. [2022-03-03 20:06:19,625 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 20:06:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 9118 transitions. [2022-03-03 20:06:19,630 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 9118 transitions. Word has length 26 [2022-03-03 20:06:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:19,630 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 9118 transitions. [2022-03-03 20:06:19,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 9118 transitions. [2022-03-03 20:06:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:19,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:19,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:06:19,651 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 20:06:19,850 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 20:06:19,851 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash -353117544, now seen corresponding path program 39 times [2022-03-03 20:06:19,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:19,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44549900] [2022-03-03 20:06:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:19,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:20,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:20,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44549900] [2022-03-03 20:06:20,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44549900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:20,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870552414] [2022-03-03 20:06:20,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:06:20,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:20,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:20,117 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 20:06:20,118 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 20:06:20,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:06:20,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:20,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:06:20,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:20,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:20,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:20,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:20,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:06:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:21,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:21,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:21,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:21,801 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 20:06:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:21,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870552414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:21,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:21,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-03-03 20:06:21,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277661668] [2022-03-03 20:06:21,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:21,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 20:06:21,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 20:06:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 20:06:21,924 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 20:06:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:48,389 INFO L93 Difference]: Finished difference Result 9106 states and 28908 transitions. [2022-03-03 20:06:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-03-03 20:06:48,389 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 20:06:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:48,405 INFO L225 Difference]: With dead ends: 9106 [2022-03-03 20:06:48,405 INFO L226 Difference]: Without dead ends: 9039 [2022-03-03 20:06:48,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23351 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=11129, Invalid=41083, Unknown=0, NotChecked=0, Total=52212 [2022-03-03 20:06:48,407 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1250 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 4476 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:48,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 1133 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 4476 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-03 20:06:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2022-03-03 20:06:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 2626. [2022-03-03 20:06:48,480 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 20:06:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 9546 transitions. [2022-03-03 20:06:48,485 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 9546 transitions. Word has length 26 [2022-03-03 20:06:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:48,485 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 9546 transitions. [2022-03-03 20:06:48,486 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 20:06:48,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 9546 transitions. [2022-03-03 20:06:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:48,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:48,489 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 20:06:48,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 20:06:48,705 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 20:06:48,705 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1122519044, now seen corresponding path program 12 times [2022-03-03 20:06:48,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:48,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172942992] [2022-03-03 20:06:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:49,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:49,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172942992] [2022-03-03 20:06:49,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172942992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:49,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376521984] [2022-03-03 20:06:49,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:06:49,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:49,048 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 20:06:49,063 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 20:06:49,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:06:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:06:49,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:49,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:49,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:49,612 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 20:06:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:49,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:50,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:50,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:50,119 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 20:06:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:52,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376521984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:52,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:52,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:06:52,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231583759] [2022-03-03 20:06:52,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:52,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:06:52,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:06:52,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:06:52,734 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 20:06:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:55,597 INFO L93 Difference]: Finished difference Result 4913 states and 16279 transitions. [2022-03-03 20:06:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:06:55,597 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 20:06:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:55,606 INFO L225 Difference]: With dead ends: 4913 [2022-03-03 20:06:55,606 INFO L226 Difference]: Without dead ends: 4835 [2022-03-03 20:06:55,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=664, Invalid=3242, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 20:06:55,607 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 20:06:55,607 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 20:06:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-03-03 20:06:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 2703. [2022-03-03 20:06:55,667 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 20:06:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 9800 transitions. [2022-03-03 20:06:55,673 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 9800 transitions. Word has length 26 [2022-03-03 20:06:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:55,673 INFO L470 AbstractCegarLoop]: Abstraction has 2703 states and 9800 transitions. [2022-03-03 20:06:55,673 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 20:06:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 9800 transitions. [2022-03-03 20:06:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:55,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:55,677 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 20:06:55,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 20:06:55,882 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 20:06:55,883 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1990419930, now seen corresponding path program 13 times [2022-03-03 20:06:55,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:55,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578761208] [2022-03-03 20:06:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:55,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:56,257 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 20:06:56,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:56,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578761208] [2022-03-03 20:06:56,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578761208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:56,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330174542] [2022-03-03 20:06:56,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:06:56,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:56,259 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 20:06:56,259 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 20:06:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:56,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:06:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:56,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:56,775 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 20:06:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:57,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:57,720 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:06:57,720 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 20:06:59,286 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 20:06:59,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330174542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:59,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:59,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:06:59,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470362321] [2022-03-03 20:06:59,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:59,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:06:59,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:06:59,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:06:59,287 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 20:07:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:04,040 INFO L93 Difference]: Finished difference Result 5160 states and 17193 transitions. [2022-03-03 20:07:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 20:07:04,040 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 20:07:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:04,049 INFO L225 Difference]: With dead ends: 5160 [2022-03-03 20:07:04,050 INFO L226 Difference]: Without dead ends: 5115 [2022-03-03 20:07:04,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=838, Invalid=5482, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 20:07:04,050 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 331 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:04,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 451 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:07:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2022-03-03 20:07:04,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 2687. [2022-03-03 20:07:04,096 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 20:07:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 9758 transitions. [2022-03-03 20:07:04,101 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 9758 transitions. Word has length 26 [2022-03-03 20:07:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:04,101 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 9758 transitions. [2022-03-03 20:07:04,101 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 20:07:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 9758 transitions. [2022-03-03 20:07:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:04,105 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:04,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:04,121 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 20:07:04,320 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 20:07:04,320 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1451678616, now seen corresponding path program 14 times [2022-03-03 20:07:04,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:04,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911291628] [2022-03-03 20:07:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:04,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:04,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:04,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911291628] [2022-03-03 20:07:04,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911291628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:04,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562768671] [2022-03-03 20:07:04,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:07:04,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:04,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:04,562 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 20:07:04,563 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 20:07:04,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:07:04,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:07:04,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:05,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:05,376 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 20:07:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:06,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:06,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:06,741 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 20:07:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:08,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562768671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:08,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:08,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-03-03 20:07:08,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659071099] [2022-03-03 20:07:08,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:08,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:07:08,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:07:08,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:07:08,881 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 20:07:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:10,179 INFO L93 Difference]: Finished difference Result 5325 states and 19041 transitions. [2022-03-03 20:07:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 20:07:10,180 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 20:07:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:10,191 INFO L225 Difference]: With dead ends: 5325 [2022-03-03 20:07:10,191 INFO L226 Difference]: Without dead ends: 5310 [2022-03-03 20:07:10,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:07:10,191 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 366 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:10,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 282 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 733 Invalid, 0 Unknown, 711 Unchecked, 0.3s Time] [2022-03-03 20:07:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2022-03-03 20:07:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 2699. [2022-03-03 20:07:10,280 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 20:07:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 9806 transitions. [2022-03-03 20:07:10,289 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 9806 transitions. Word has length 26 [2022-03-03 20:07:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:10,289 INFO L470 AbstractCegarLoop]: Abstraction has 2699 states and 9806 transitions. [2022-03-03 20:07:10,289 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 20:07:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 9806 transitions. [2022-03-03 20:07:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:10,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:10,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:10,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:10,510 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 20:07:10,511 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1057572634, now seen corresponding path program 15 times [2022-03-03 20:07:10,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:10,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916194873] [2022-03-03 20:07:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:10,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:10,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916194873] [2022-03-03 20:07:10,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916194873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:10,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152100585] [2022-03-03 20:07:10,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:07:10,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:10,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:10,812 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 20:07:10,813 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 20:07:10,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:07:10,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:07:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:11,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:11,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:11,232 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 20:07:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:11,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:12,193 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:07:12,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-03 20:07:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:12,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152100585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:12,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:12,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:07:12,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626354820] [2022-03-03 20:07:12,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:12,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:07:12,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:07:12,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:07:12,968 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 20:07:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:19,351 INFO L93 Difference]: Finished difference Result 6053 states and 20100 transitions. [2022-03-03 20:07:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 20:07:19,351 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 20:07:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:19,362 INFO L225 Difference]: With dead ends: 6053 [2022-03-03 20:07:19,362 INFO L226 Difference]: Without dead ends: 6002 [2022-03-03 20:07:19,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3202 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1377, Invalid=8325, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 20:07:19,363 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 432 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:19,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 512 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:07:19,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2022-03-03 20:07:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 2697. [2022-03-03 20:07:19,419 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 20:07:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 9801 transitions. [2022-03-03 20:07:19,424 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 9801 transitions. Word has length 26 [2022-03-03 20:07:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:19,425 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 9801 transitions. [2022-03-03 20:07:19,425 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 20:07:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 9801 transitions. [2022-03-03 20:07:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:19,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:19,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:19,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:19,643 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 20:07:19,643 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 16 times [2022-03-03 20:07:19,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:19,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366626918] [2022-03-03 20:07:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:19,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:19,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366626918] [2022-03-03 20:07:19,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366626918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:19,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798130298] [2022-03-03 20:07:19,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:07:19,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:19,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:19,834 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 20:07:19,835 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 20:07:19,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:07:19,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:19,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:07:19,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:20,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:20,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:07:20,487 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 20:07:20,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:21,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:21,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:21,037 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 20:07:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:22,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798130298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:22,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:22,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:07:22,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528916355] [2022-03-03 20:07:22,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:22,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:07:22,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:07:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:07:22,666 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 20:07:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:26,443 INFO L93 Difference]: Finished difference Result 5180 states and 17050 transitions. [2022-03-03 20:07:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:07:26,443 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 20:07:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:26,453 INFO L225 Difference]: With dead ends: 5180 [2022-03-03 20:07:26,453 INFO L226 Difference]: Without dead ends: 5052 [2022-03-03 20:07:26,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=658, Invalid=3002, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:07:26,454 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 20:07:26,457 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 20:07:26,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2022-03-03 20:07:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 2791. [2022-03-03 20:07:26,537 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 20:07:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10110 transitions. [2022-03-03 20:07:26,544 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10110 transitions. Word has length 26 [2022-03-03 20:07:26,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:26,544 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 10110 transitions. [2022-03-03 20:07:26,544 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 20:07:26,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10110 transitions. [2022-03-03 20:07:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:26,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:26,550 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, 1, 1] [2022-03-03 20:07:26,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-03 20:07:26,751 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 20:07:26,751 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 17 times [2022-03-03 20:07:26,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:26,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441136393] [2022-03-03 20:07:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:26,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:26,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:26,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441136393] [2022-03-03 20:07:26,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441136393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:26,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998306233] [2022-03-03 20:07:26,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:07:26,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:26,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:26,942 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 20:07:26,942 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 20:07:26,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:07:26,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:07:26,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:27,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:27,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:27,238 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 20:07:27,573 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 20:07:27,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:27,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:27,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:27,953 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 20:07:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:29,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998306233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:29,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:29,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:07:29,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148786698] [2022-03-03 20:07:29,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:29,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:07:29,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:29,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:07:29,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:07:29,576 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 20:07:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:42,429 INFO L93 Difference]: Finished difference Result 7464 states and 23779 transitions. [2022-03-03 20:07:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 20:07:42,429 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 20:07:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:42,442 INFO L225 Difference]: With dead ends: 7464 [2022-03-03 20:07:42,442 INFO L226 Difference]: Without dead ends: 7289 [2022-03-03 20:07:42,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5210 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2262, Invalid=12018, Unknown=0, NotChecked=0, Total=14280 [2022-03-03 20:07:42,443 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 575 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:42,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 629 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 20:07:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2022-03-03 20:07:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 2946. [2022-03-03 20:07:42,535 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 20:07:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 10710 transitions. [2022-03-03 20:07:42,541 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 10710 transitions. Word has length 26 [2022-03-03 20:07:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:42,541 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 10710 transitions. [2022-03-03 20:07:42,541 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 20:07:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 10710 transitions. [2022-03-03 20:07:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:42,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:42,545 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 20:07:42,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:42,751 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 20:07:42,751 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 18 times [2022-03-03 20:07:42,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:42,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073050638] [2022-03-03 20:07:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:43,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:43,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073050638] [2022-03-03 20:07:43,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073050638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:43,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76681990] [2022-03-03 20:07:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:07:43,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:43,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:43,076 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 20:07:43,077 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 20:07:43,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:07:43,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:43,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:07:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:43,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:43,540 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 20:07:44,093 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 20:07:44,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:44,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:44,582 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 20:07:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:47,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76681990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:47,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:47,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-03 20:07:47,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264059194] [2022-03-03 20:07:47,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:47,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:07:47,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:47,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:07:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:07:47,837 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 20:07:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:51,302 INFO L93 Difference]: Finished difference Result 5431 states and 18218 transitions. [2022-03-03 20:07:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 20:07:51,303 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 20:07:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:51,312 INFO L225 Difference]: With dead ends: 5431 [2022-03-03 20:07:51,312 INFO L226 Difference]: Without dead ends: 5340 [2022-03-03 20:07:51,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=767, Invalid=3925, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:07:51,313 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 387 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:51,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 417 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1404 Invalid, 0 Unknown, 174 Unchecked, 0.7s Time] [2022-03-03 20:07:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2022-03-03 20:07:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 2971. [2022-03-03 20:07:51,368 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 20:07:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 10814 transitions. [2022-03-03 20:07:51,374 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 10814 transitions. Word has length 26 [2022-03-03 20:07:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:51,374 INFO L470 AbstractCegarLoop]: Abstraction has 2971 states and 10814 transitions. [2022-03-03 20:07:51,374 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 20:07:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 10814 transitions. [2022-03-03 20:07:51,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:51,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:51,379 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 20:07:51,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:51,593 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 20:07:51,594 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:51,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:51,594 INFO L85 PathProgramCache]: Analyzing trace with hash 237410036, now seen corresponding path program 19 times [2022-03-03 20:07:51,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:51,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936991861] [2022-03-03 20:07:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:51,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:51,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936991861] [2022-03-03 20:07:51,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936991861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:51,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198250336] [2022-03-03 20:07:51,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:07:51,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:51,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:51,908 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 20:07:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:51,947 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 20:07:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:07:51,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:52,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:52,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:52,488 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 20:07:52,619 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 20:07:52,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:53,143 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:07:53,147 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 20:07:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:54,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198250336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:54,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:54,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 20:07:54,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577629142] [2022-03-03 20:07:54,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:54,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:07:54,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:07:54,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:07:54,723 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 20:07:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:56,784 INFO L93 Difference]: Finished difference Result 4946 states and 16708 transitions. [2022-03-03 20:07:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 20:07:56,784 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 20:07:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:56,793 INFO L225 Difference]: With dead ends: 4946 [2022-03-03 20:07:56,793 INFO L226 Difference]: Without dead ends: 4916 [2022-03-03 20:07:56,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:07:56,794 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 20:07:56,794 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 20:07:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2022-03-03 20:07:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 2980. [2022-03-03 20:07:56,840 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 20:07:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 10847 transitions. [2022-03-03 20:07:56,846 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 10847 transitions. Word has length 26 [2022-03-03 20:07:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:56,846 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 10847 transitions. [2022-03-03 20:07:56,846 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 20:07:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 10847 transitions. [2022-03-03 20:07:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:56,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:56,850 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 20:07:56,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:57,065 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 20:07:57,066 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1355581052, now seen corresponding path program 20 times [2022-03-03 20:07:57,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:57,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478296233] [2022-03-03 20:07:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:57,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:57,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:57,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478296233] [2022-03-03 20:07:57,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478296233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:57,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841753344] [2022-03-03 20:07:57,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:07:57,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:57,318 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 20:07:57,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:07:57,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:57,392 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 20:07:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:07:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:57,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:57,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:57,803 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 20:07:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:58,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:58,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:58,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:58,531 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 20:08:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:00,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841753344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:00,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:00,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:08:00,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945052368] [2022-03-03 20:08:00,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:00,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:08:00,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:08:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:08:00,082 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 20:08:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:03,596 INFO L93 Difference]: Finished difference Result 5798 states and 19244 transitions. [2022-03-03 20:08:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:08:03,596 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 20:08:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:03,607 INFO L225 Difference]: With dead ends: 5798 [2022-03-03 20:08:03,607 INFO L226 Difference]: Without dead ends: 5705 [2022-03-03 20:08:03,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=805, Invalid=3485, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:08:03,608 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 20:08:03,608 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 20:08:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2022-03-03 20:08:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 2997. [2022-03-03 20:08:03,673 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 20:08:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 10905 transitions. [2022-03-03 20:08:03,680 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 10905 transitions. Word has length 26 [2022-03-03 20:08:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:03,680 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 10905 transitions. [2022-03-03 20:08:03,680 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 20:08:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 10905 transitions. [2022-03-03 20:08:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:03,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:03,684 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 20:08:03,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:03,900 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 20:08:03,900 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:03,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:03,901 INFO L85 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 21 times [2022-03-03 20:08:03,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:03,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013006698] [2022-03-03 20:08:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:03,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:04,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:04,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013006698] [2022-03-03 20:08:04,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013006698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:04,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514070233] [2022-03-03 20:08:04,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:08:04,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:04,245 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 20:08:04,246 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 20:08:04,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:08:04,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:04,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:04,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:04,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:04,796 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 20:08:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:04,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:05,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:05,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:05,316 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 20:08:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:06,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514070233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:06,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:06,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:08:06,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184997182] [2022-03-03 20:08:06,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:06,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:06,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:06,467 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 20:08:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:09,432 INFO L93 Difference]: Finished difference Result 5382 states and 18047 transitions. [2022-03-03 20:08:09,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:08:09,432 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 20:08:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:09,442 INFO L225 Difference]: With dead ends: 5382 [2022-03-03 20:08:09,442 INFO L226 Difference]: Without dead ends: 5324 [2022-03-03 20:08:09,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=768, Invalid=3392, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 20:08:09,442 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 20:08:09,443 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 20:08:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2022-03-03 20:08:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 3055. [2022-03-03 20:08:09,496 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 20:08:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 11100 transitions. [2022-03-03 20:08:09,502 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 11100 transitions. Word has length 26 [2022-03-03 20:08:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:09,502 INFO L470 AbstractCegarLoop]: Abstraction has 3055 states and 11100 transitions. [2022-03-03 20:08:09,502 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 20:08:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 11100 transitions. [2022-03-03 20:08:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:09,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:09,507 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 20:08:09,524 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 20:08:09,722 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 20:08:09,723 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash -697050812, now seen corresponding path program 22 times [2022-03-03 20:08:09,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:09,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29539504] [2022-03-03 20:08:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:09,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:09,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:09,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29539504] [2022-03-03 20:08:09,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29539504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:09,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67290393] [2022-03-03 20:08:09,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:08:09,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:09,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:09,978 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 20:08:09,979 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 20:08:10,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:08:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:10,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:10,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:10,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:10,426 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 20:08:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:10,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:11,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:11,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:11,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:08:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:12,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67290393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:12,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:12,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:08:12,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322157950] [2022-03-03 20:08:12,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:12,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:08:12,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:12,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:08:12,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:08:12,206 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 20:08:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:16,045 INFO L93 Difference]: Finished difference Result 5939 states and 19853 transitions. [2022-03-03 20:08:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 20:08:16,045 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 20:08:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:16,057 INFO L225 Difference]: With dead ends: 5939 [2022-03-03 20:08:16,057 INFO L226 Difference]: Without dead ends: 5895 [2022-03-03 20:08:16,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=951, Invalid=3879, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 20:08:16,058 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 20:08:16,058 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 20:08:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-03-03 20:08:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 3081. [2022-03-03 20:08:16,120 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 20:08:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 11211 transitions. [2022-03-03 20:08:16,127 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 11211 transitions. Word has length 26 [2022-03-03 20:08:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:16,128 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 11211 transitions. [2022-03-03 20:08:16,128 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 20:08:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 11211 transitions. [2022-03-03 20:08:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:16,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:16,133 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 20:08:16,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:16,349 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 20:08:16,349 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 23 times [2022-03-03 20:08:16,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:16,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833687709] [2022-03-03 20:08:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:16,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:16,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833687709] [2022-03-03 20:08:16,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833687709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:16,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187409014] [2022-03-03 20:08:16,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:08:16,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:16,610 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 20:08:16,611 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 20:08:16,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:08:16,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:08:16,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:17,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:17,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:17,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:08:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:17,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:17,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:17,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:17,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 203 treesize of output 165 [2022-03-03 20:08:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:19,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187409014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:19,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:19,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:08:19,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118726176] [2022-03-03 20:08:19,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:19,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:19,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:19,458 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 20:08:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:24,003 INFO L93 Difference]: Finished difference Result 5840 states and 19590 transitions. [2022-03-03 20:08:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 20:08:24,003 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 20:08:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:24,014 INFO L225 Difference]: With dead ends: 5840 [2022-03-03 20:08:24,014 INFO L226 Difference]: Without dead ends: 5758 [2022-03-03 20:08:24,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1136, Invalid=5836, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 20:08:24,015 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 461 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:24,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 299 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1061 Invalid, 0 Unknown, 129 Unchecked, 0.6s Time] [2022-03-03 20:08:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2022-03-03 20:08:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 3146. [2022-03-03 20:08:24,074 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 20:08:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 11443 transitions. [2022-03-03 20:08:24,081 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 11443 transitions. Word has length 26 [2022-03-03 20:08:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:24,082 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 11443 transitions. [2022-03-03 20:08:24,082 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 20:08:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 11443 transitions. [2022-03-03 20:08:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:24,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:24,087 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, 1, 1] [2022-03-03 20:08:24,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:24,302 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 20:08:24,303 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1440358446, now seen corresponding path program 24 times [2022-03-03 20:08:24,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:24,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640188958] [2022-03-03 20:08:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:24,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:24,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:24,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640188958] [2022-03-03 20:08:24,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640188958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:24,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677607695] [2022-03-03 20:08:24,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:08:24,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:24,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:24,525 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 20:08:24,526 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 20:08:24,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:08:24,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:24,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:24,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:24,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:24,782 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 20:08:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:25,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:25,544 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:08:25,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:08:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:27,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677607695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:27,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:27,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:08:27,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679225312] [2022-03-03 20:08:27,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:27,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:27,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:27,035 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 20:08:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:31,385 INFO L93 Difference]: Finished difference Result 6413 states and 21358 transitions. [2022-03-03 20:08:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:08:31,385 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 20:08:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:31,397 INFO L225 Difference]: With dead ends: 6413 [2022-03-03 20:08:31,401 INFO L226 Difference]: Without dead ends: 6342 [2022-03-03 20:08:31,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1042, Invalid=5438, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 20:08:31,402 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 467 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:31,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 384 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:08:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-03-03 20:08:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 3169. [2022-03-03 20:08:31,463 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 20:08:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 11516 transitions. [2022-03-03 20:08:31,470 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 11516 transitions. Word has length 26 [2022-03-03 20:08:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:31,470 INFO L470 AbstractCegarLoop]: Abstraction has 3169 states and 11516 transitions. [2022-03-03 20:08:31,471 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 20:08:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 11516 transitions. [2022-03-03 20:08:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:31,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:31,476 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 20:08:31,493 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 20:08:31,690 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 20:08:31,690 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash 457853170, now seen corresponding path program 40 times [2022-03-03 20:08:31,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:31,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208463619] [2022-03-03 20:08:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:31,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:31,910 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 20:08:31,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:31,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208463619] [2022-03-03 20:08:31,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208463619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:31,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026596821] [2022-03-03 20:08:31,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:08:31,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:31,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:31,912 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 20:08:31,912 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 20:08:31,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:08:31,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:31,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:32,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:32,296 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 20:08:32,356 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 20:08:32,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:32,786 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:08:32,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:08:33,232 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 20:08:33,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026596821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:33,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:33,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:08:33,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131999866] [2022-03-03 20:08:33,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:33,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:33,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:33,234 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 20:08:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:35,711 INFO L93 Difference]: Finished difference Result 5026 states and 17247 transitions. [2022-03-03 20:08:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:08:35,712 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 20:08:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:35,721 INFO L225 Difference]: With dead ends: 5026 [2022-03-03 20:08:35,721 INFO L226 Difference]: Without dead ends: 4925 [2022-03-03 20:08:35,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=705, Invalid=3987, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:08:35,722 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 315 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:35,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 311 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:08:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2022-03-03 20:08:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 3223. [2022-03-03 20:08:35,772 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 20:08:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 11665 transitions. [2022-03-03 20:08:35,779 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 11665 transitions. Word has length 26 [2022-03-03 20:08:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:35,779 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 11665 transitions. [2022-03-03 20:08:35,780 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 20:08:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 11665 transitions. [2022-03-03 20:08:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:35,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:35,785 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 20:08:35,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:35,999 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 20:08:35,999 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 41 times [2022-03-03 20:08:36,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:36,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958003476] [2022-03-03 20:08:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:36,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:36,282 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 20:08:36,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:36,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958003476] [2022-03-03 20:08:36,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958003476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:36,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763081817] [2022-03-03 20:08:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:08:36,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:36,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:36,284 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 20:08:36,299 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 20:08:36,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:08:36,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:08:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:36,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:36,750 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 20:08:36,872 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 20:08:36,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:37,401 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:08:37,401 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 20:08:37,814 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 20:08:37,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763081817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:37,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:37,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:08:37,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541659669] [2022-03-03 20:08:37,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:37,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:37,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:37,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:37,815 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 20:08:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:41,507 INFO L93 Difference]: Finished difference Result 5597 states and 19124 transitions. [2022-03-03 20:08:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 20:08:41,507 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 20:08:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:41,518 INFO L225 Difference]: With dead ends: 5597 [2022-03-03 20:08:41,518 INFO L226 Difference]: Without dead ends: 5553 [2022-03-03 20:08:41,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 20:08:41,520 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 299 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:41,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 578 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1983 Invalid, 0 Unknown, 186 Unchecked, 0.8s Time] [2022-03-03 20:08:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5553 states. [2022-03-03 20:08:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5553 to 3237. [2022-03-03 20:08:41,608 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 20:08:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 11716 transitions. [2022-03-03 20:08:41,615 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 11716 transitions. Word has length 26 [2022-03-03 20:08:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:41,615 INFO L470 AbstractCegarLoop]: Abstraction has 3237 states and 11716 transitions. [2022-03-03 20:08:41,615 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 20:08:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 11716 transitions. [2022-03-03 20:08:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:41,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:41,621 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, 1, 1] [2022-03-03 20:08:41,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 20:08:41,835 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 20:08:41,835 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 25 times [2022-03-03 20:08:41,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:41,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746495877] [2022-03-03 20:08:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:41,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:42,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:42,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746495877] [2022-03-03 20:08:42,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746495877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:42,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030618706] [2022-03-03 20:08:42,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:08:42,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:42,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:42,123 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 20:08:42,124 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 20:08:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:42,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:42,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:42,630 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 20:08:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:42,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:43,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:43,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:43,159 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 20:08:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:44,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030618706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:44,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:44,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:08:44,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965299595] [2022-03-03 20:08:44,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:44,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:44,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:44,170 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 20:08:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:48,032 INFO L93 Difference]: Finished difference Result 6941 states and 22699 transitions. [2022-03-03 20:08:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:08:48,032 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 20:08:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:48,045 INFO L225 Difference]: With dead ends: 6941 [2022-03-03 20:08:48,045 INFO L226 Difference]: Without dead ends: 6911 [2022-03-03 20:08:48,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1205, Invalid=4051, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 20:08:48,046 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 522 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:48,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 339 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1298 Invalid, 0 Unknown, 58 Unchecked, 0.7s Time] [2022-03-03 20:08:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2022-03-03 20:08:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 3338. [2022-03-03 20:08:48,114 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 20:08:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 12097 transitions. [2022-03-03 20:08:48,122 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 12097 transitions. Word has length 26 [2022-03-03 20:08:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:48,122 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 12097 transitions. [2022-03-03 20:08:48,122 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 20:08:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 12097 transitions. [2022-03-03 20:08:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:48,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:48,127 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 20:08:48,143 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 20:08:48,343 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 20:08:48,343 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash 397567668, now seen corresponding path program 26 times [2022-03-03 20:08:48,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:48,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687931441] [2022-03-03 20:08:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:48,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:48,659 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 20:08:48,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:48,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687931441] [2022-03-03 20:08:48,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687931441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:48,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686716861] [2022-03-03 20:08:48,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:08:48,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:48,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:48,661 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 20:08:48,687 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 20:08:48,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:08:48,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:49,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:49,155 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 20:08:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:49,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:50,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:50,382 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 20:08:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:50,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686716861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:50,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:50,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:08:50,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545296409] [2022-03-03 20:08:50,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:50,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:08:50,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:08:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:08:50,905 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 20:09:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:00,964 INFO L93 Difference]: Finished difference Result 7210 states and 24172 transitions. [2022-03-03 20:09:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-03 20:09:00,965 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 20:09:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:00,979 INFO L225 Difference]: With dead ends: 7210 [2022-03-03 20:09:00,979 INFO L226 Difference]: Without dead ends: 7165 [2022-03-03 20:09:00,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5504 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2510, Invalid=11770, Unknown=0, NotChecked=0, Total=14280 [2022-03-03 20:09:00,980 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 775 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:00,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 646 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1589 Invalid, 0 Unknown, 727 Unchecked, 0.9s Time] [2022-03-03 20:09:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-03-03 20:09:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 3373. [2022-03-03 20:09:01,053 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 20:09:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 12264 transitions. [2022-03-03 20:09:01,061 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 12264 transitions. Word has length 26 [2022-03-03 20:09:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:01,061 INFO L470 AbstractCegarLoop]: Abstraction has 3373 states and 12264 transitions. [2022-03-03 20:09:01,061 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 20:09:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 12264 transitions. [2022-03-03 20:09:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:01,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:01,066 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 20:09:01,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:01,279 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 20:09:01,279 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1096340054, now seen corresponding path program 27 times [2022-03-03 20:09:01,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:01,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288537960] [2022-03-03 20:09:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:01,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:01,685 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 20:09:01,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:01,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288537960] [2022-03-03 20:09:01,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288537960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:01,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478774861] [2022-03-03 20:09:01,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:09:01,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:01,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:01,686 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 20:09:01,687 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 20:09:01,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:09:01,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:09:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:02,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:02,294 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 20:09:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:02,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:02,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:02,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:02,940 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 20:09:04,619 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 20:09:04,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478774861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:04,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:04,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:09:04,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962877403] [2022-03-03 20:09:04,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:04,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:04,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:04,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:04,620 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 20:09:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:08,984 INFO L93 Difference]: Finished difference Result 7051 states and 23276 transitions. [2022-03-03 20:09:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:09:08,984 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 20:09:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:08,999 INFO L225 Difference]: With dead ends: 7051 [2022-03-03 20:09:08,999 INFO L226 Difference]: Without dead ends: 7044 [2022-03-03 20:09:09,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1146, Invalid=4110, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 20:09:09,000 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 506 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:09,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 364 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1477 Invalid, 0 Unknown, 62 Unchecked, 0.8s Time] [2022-03-03 20:09:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7044 states. [2022-03-03 20:09:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7044 to 3360. [2022-03-03 20:09:09,086 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 20:09:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 12225 transitions. [2022-03-03 20:09:09,094 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 12225 transitions. Word has length 26 [2022-03-03 20:09:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:09,094 INFO L470 AbstractCegarLoop]: Abstraction has 3360 states and 12225 transitions. [2022-03-03 20:09:09,094 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 20:09:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 12225 transitions. [2022-03-03 20:09:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:09,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:09,101 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 20:09:09,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-03 20:09:09,309 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 20:09:09,309 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:09,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1623096648, now seen corresponding path program 28 times [2022-03-03 20:09:09,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:09,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262345920] [2022-03-03 20:09:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:09,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:09,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:09,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262345920] [2022-03-03 20:09:09,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262345920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:09,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60282348] [2022-03-03 20:09:09,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:09:09,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:09,658 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 20:09:09,659 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 20:09:09,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:09:09,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:09,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:09:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:10,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:10,345 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 20:09:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:10,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:10,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:10,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:11,000 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 20:09:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:13,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60282348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:13,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:13,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:09:13,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349077979] [2022-03-03 20:09:13,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:13,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:13,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:13,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:13,044 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 20:09:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:18,163 INFO L93 Difference]: Finished difference Result 6877 states and 22705 transitions. [2022-03-03 20:09:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:09:18,164 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 20:09:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:18,178 INFO L225 Difference]: With dead ends: 6877 [2022-03-03 20:09:18,179 INFO L226 Difference]: Without dead ends: 6847 [2022-03-03 20:09:18,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1249, Invalid=4603, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 20:09:18,179 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 20:09:18,179 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 20:09:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2022-03-03 20:09:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 3372. [2022-03-03 20:09:18,255 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 20:09:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 12273 transitions. [2022-03-03 20:09:18,263 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 12273 transitions. Word has length 26 [2022-03-03 20:09:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:18,263 INFO L470 AbstractCegarLoop]: Abstraction has 3372 states and 12273 transitions. [2022-03-03 20:09:18,263 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 20:09:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 12273 transitions. [2022-03-03 20:09:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:18,269 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:18,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:18,287 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 20:09:18,485 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 20:09:18,485 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash 5563868, now seen corresponding path program 29 times [2022-03-03 20:09:18,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:18,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844173128] [2022-03-03 20:09:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:18,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:18,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:18,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844173128] [2022-03-03 20:09:18,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844173128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:18,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623834453] [2022-03-03 20:09:18,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:09:18,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:18,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:18,803 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 20:09:18,852 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 20:09:18,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:09:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:19,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:19,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:19,319 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 20:09:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:19,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:20,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:20,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:20,277 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 20:09:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:22,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623834453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:22,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:22,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:09:22,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445800767] [2022-03-03 20:09:22,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:22,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:22,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:22,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:22,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:22,492 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 20:09:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:32,355 INFO L93 Difference]: Finished difference Result 8010 states and 26236 transitions. [2022-03-03 20:09:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 20:09:32,356 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 20:09:32,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:32,374 INFO L225 Difference]: With dead ends: 8010 [2022-03-03 20:09:32,375 INFO L226 Difference]: Without dead ends: 7965 [2022-03-03 20:09:32,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2169, Invalid=9173, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 20:09:32,376 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 20:09:32,376 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 20:09:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2022-03-03 20:09:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 3436. [2022-03-03 20:09:32,473 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 20:09:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 12540 transitions. [2022-03-03 20:09:32,482 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 12540 transitions. Word has length 26 [2022-03-03 20:09:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:32,483 INFO L470 AbstractCegarLoop]: Abstraction has 3436 states and 12540 transitions. [2022-03-03 20:09:32,483 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 20:09:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 12540 transitions. [2022-03-03 20:09:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:32,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:32,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:32,507 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 20:09:32,705 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 20:09:32,705 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:32,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:32,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1809601360, now seen corresponding path program 42 times [2022-03-03 20:09:32,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:32,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249877123] [2022-03-03 20:09:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:32,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:32,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:32,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249877123] [2022-03-03 20:09:32,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249877123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:32,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298426230] [2022-03-03 20:09:32,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:09:32,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:32,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:32,980 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 20:09:32,981 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 20:09:33,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:09:33,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:33,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:33,490 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 20:09:35,048 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 20:09:35,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:35,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:35,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:35,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:35,853 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 20:09:36,255 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 20:09:36,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298426230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:36,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:36,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-03-03 20:09:36,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348685337] [2022-03-03 20:09:36,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:36,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 20:09:36,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 20:09:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-03-03 20:09:36,256 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 20:10:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:00,211 INFO L93 Difference]: Finished difference Result 11873 states and 40846 transitions. [2022-03-03 20:10:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-03-03 20:10:00,211 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 20:10:00,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:00,237 INFO L225 Difference]: With dead ends: 11873 [2022-03-03 20:10:00,237 INFO L226 Difference]: Without dead ends: 11816 [2022-03-03 20:10:00,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31261 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=9130, Invalid=59776, Unknown=0, NotChecked=0, Total=68906 [2022-03-03 20:10:00,240 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 771 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:00,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 885 Invalid, 5822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2565 Invalid, 0 Unknown, 3077 Unchecked, 1.4s Time] [2022-03-03 20:10:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11816 states. [2022-03-03 20:10:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11816 to 3622. [2022-03-03 20:10:00,358 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 20:10:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 13339 transitions. [2022-03-03 20:10:00,367 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 13339 transitions. Word has length 26 [2022-03-03 20:10:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:00,367 INFO L470 AbstractCegarLoop]: Abstraction has 3622 states and 13339 transitions. [2022-03-03 20:10:00,367 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 20:10:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 13339 transitions. [2022-03-03 20:10:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:00,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:00,372 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 20:10:00,388 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 20:10:00,588 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 20:10:00,588 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:00,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1901962258, now seen corresponding path program 43 times [2022-03-03 20:10:00,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:00,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787658014] [2022-03-03 20:10:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:00,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:00,903 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 20:10:00,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:00,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787658014] [2022-03-03 20:10:00,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787658014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:00,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732149972] [2022-03-03 20:10:00,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:10:00,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:00,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:00,905 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 20:10:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:00,950 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 20:10:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 20:10:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:01,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:01,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:01,474 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 20:10:03,065 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 20:10:03,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:03,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:03,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:04,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:04,005 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 20:10:05,273 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 20:10:05,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732149972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:05,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:05,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-03-03 20:10:05,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371815797] [2022-03-03 20:10:05,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:05,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:10:05,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:10:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:10:05,275 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 20:10:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:08,531 INFO L93 Difference]: Finished difference Result 6615 states and 22720 transitions. [2022-03-03 20:10:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:10:08,532 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 20:10:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:08,546 INFO L225 Difference]: With dead ends: 6615 [2022-03-03 20:10:08,546 INFO L226 Difference]: Without dead ends: 6551 [2022-03-03 20:10:08,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1226, Invalid=5094, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 20:10:08,549 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 20:10:08,550 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 20:10:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2022-03-03 20:10:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 3723. [2022-03-03 20:10:08,626 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 20:10:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 13708 transitions. [2022-03-03 20:10:08,635 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 13708 transitions. Word has length 26 [2022-03-03 20:10:08,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:08,635 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 13708 transitions. [2022-03-03 20:10:08,635 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 20:10:08,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 13708 transitions. [2022-03-03 20:10:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:08,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:08,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:08,656 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 20:10:08,856 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 20:10:08,856 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1873974798, now seen corresponding path program 30 times [2022-03-03 20:10:08,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:08,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142639376] [2022-03-03 20:10:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:08,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:09,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:09,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142639376] [2022-03-03 20:10:09,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142639376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:09,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402367566] [2022-03-03 20:10:09,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:10:09,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:09,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:09,177 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 20:10:09,179 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 20:10:09,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:10:09,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:09,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:10:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:09,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:09,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:09,684 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 20:10:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:09,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:10,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:10,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:10,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:10,390 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 20:10:10,865 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 20:10:10,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402367566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:10,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:10,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-03 20:10:10,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132994722] [2022-03-03 20:10:10,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:10,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:10:10,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:10,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:10:10,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:10:10,866 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 20:10:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:15,596 INFO L93 Difference]: Finished difference Result 6927 states and 23829 transitions. [2022-03-03 20:10:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:10:15,597 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 20:10:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:15,613 INFO L225 Difference]: With dead ends: 6927 [2022-03-03 20:10:15,613 INFO L226 Difference]: Without dead ends: 6891 [2022-03-03 20:10:15,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=869, Invalid=3961, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 20:10:15,613 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 421 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:15,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 449 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 828 Invalid, 0 Unknown, 790 Unchecked, 0.5s Time] [2022-03-03 20:10:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2022-03-03 20:10:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 3731. [2022-03-03 20:10:15,698 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 20:10:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 13740 transitions. [2022-03-03 20:10:15,708 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 13740 transitions. Word has length 26 [2022-03-03 20:10:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:15,708 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 13740 transitions. [2022-03-03 20:10:15,708 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 20:10:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 13740 transitions. [2022-03-03 20:10:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:15,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:15,715 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, 1, 1] [2022-03-03 20:10:15,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:15,927 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 20:10:15,927 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1198785412, now seen corresponding path program 31 times [2022-03-03 20:10:15,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:15,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382034542] [2022-03-03 20:10:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:16,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:16,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382034542] [2022-03-03 20:10:16,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382034542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:16,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987351230] [2022-03-03 20:10:16,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:10:16,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:16,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:16,267 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 20:10:16,267 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 20:10:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:16,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:10:16,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:16,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:16,950 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 20:10:17,093 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 20:10:17,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:17,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:17,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:17,634 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 20:10:19,156 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 20:10:19,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987351230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:19,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:19,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:10:19,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044739769] [2022-03-03 20:10:19,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:19,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:10:19,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:19,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:10:19,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:10:19,157 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 20:10:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:21,599 INFO L93 Difference]: Finished difference Result 5891 states and 20036 transitions. [2022-03-03 20:10:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 20:10:21,599 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 20:10:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:21,613 INFO L225 Difference]: With dead ends: 5891 [2022-03-03 20:10:21,613 INFO L226 Difference]: Without dead ends: 5839 [2022-03-03 20:10:21,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 20:10:21,613 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 333 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 20:10:21,614 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 20:10:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2022-03-03 20:10:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 3748. [2022-03-03 20:10:21,683 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 20:10:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 13816 transitions. [2022-03-03 20:10:21,693 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 13816 transitions. Word has length 26 [2022-03-03 20:10:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:21,694 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 13816 transitions. [2022-03-03 20:10:21,694 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 20:10:21,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 13816 transitions. [2022-03-03 20:10:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:21,701 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:21,702 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 20:10:21,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:21,915 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 20:10:21,915 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash -862074390, now seen corresponding path program 32 times [2022-03-03 20:10:21,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:21,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488838000] [2022-03-03 20:10:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:21,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:22,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:22,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488838000] [2022-03-03 20:10:22,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488838000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:22,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385792986] [2022-03-03 20:10:22,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:10:22,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:22,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:22,284 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 20:10:22,306 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 20:10:22,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:10:22,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:10:22,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:23,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:23,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:23,046 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 20:10:23,222 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 20:10:23,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:23,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:23,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:23,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:23,877 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 20:10:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:24,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385792986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:24,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:24,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:10:24,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540285127] [2022-03-03 20:10:24,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:24,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:10:24,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:10:24,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:10:24,767 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 20:10:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:33,333 INFO L93 Difference]: Finished difference Result 6519 states and 22560 transitions. [2022-03-03 20:10:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 20:10:33,333 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 20:10:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:33,348 INFO L225 Difference]: With dead ends: 6519 [2022-03-03 20:10:33,348 INFO L226 Difference]: Without dead ends: 6481 [2022-03-03 20:10:33,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1571, Invalid=8131, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 20:10:33,349 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 20:10:33,349 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 20:10:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2022-03-03 20:10:33,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 3765. [2022-03-03 20:10:33,457 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 20:10:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 13869 transitions. [2022-03-03 20:10:33,466 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 13869 transitions. Word has length 26 [2022-03-03 20:10:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:33,466 INFO L470 AbstractCegarLoop]: Abstraction has 3765 states and 13869 transitions. [2022-03-03 20:10:33,466 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 20:10:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 13869 transitions. [2022-03-03 20:10:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:33,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:33,473 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 20:10:33,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:33,689 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 20:10:33,690 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash -418747368, now seen corresponding path program 33 times [2022-03-03 20:10:33,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:33,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289771595] [2022-03-03 20:10:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:33,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:34,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:34,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289771595] [2022-03-03 20:10:34,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289771595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:34,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781929489] [2022-03-03 20:10:34,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:10:34,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:34,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:34,024 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 20:10:34,025 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 20:10:34,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:10:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:10:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:34,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:34,464 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 20:10:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:35,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:35,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:35,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:35,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:35,582 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 20:10:36,372 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 20:10:36,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781929489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:36,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:36,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:10:36,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072282469] [2022-03-03 20:10:36,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:36,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:10:36,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:10:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:10:36,373 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 20:10:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:47,812 INFO L93 Difference]: Finished difference Result 7964 states and 26967 transitions. [2022-03-03 20:10:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 20:10:47,812 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 20:10:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:47,830 INFO L225 Difference]: With dead ends: 7964 [2022-03-03 20:10:47,830 INFO L226 Difference]: Without dead ends: 7920 [2022-03-03 20:10:47,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4507 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=2125, Invalid=10307, Unknown=0, NotChecked=0, Total=12432 [2022-03-03 20:10:47,831 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 740 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:47,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 519 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1220 Invalid, 0 Unknown, 1220 Unchecked, 0.8s Time] [2022-03-03 20:10:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2022-03-03 20:10:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 3753. [2022-03-03 20:10:47,930 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 20:10:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 13807 transitions. [2022-03-03 20:10:47,940 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 13807 transitions. Word has length 26 [2022-03-03 20:10:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:47,940 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 13807 transitions. [2022-03-03 20:10:47,941 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 20:10:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 13807 transitions. [2022-03-03 20:10:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:47,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:47,947 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 20:10:47,964 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 20:10:48,164 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 20:10:48,165 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 34 times [2022-03-03 20:10:48,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:48,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108290120] [2022-03-03 20:10:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:48,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:48,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:48,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108290120] [2022-03-03 20:10:48,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108290120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:48,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323965690] [2022-03-03 20:10:48,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:10:48,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:48,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:48,425 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 20:10:48,426 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 20:10:48,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:10:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:10:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:48,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:48,825 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 20:10:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:49,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:49,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:49,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:49,641 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 20:10:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:51,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323965690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:51,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:51,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:10:51,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611219597] [2022-03-03 20:10:51,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:51,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:10:51,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:10:51,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:10:51,833 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 20:10:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:53,192 INFO L93 Difference]: Finished difference Result 5077 states and 17821 transitions. [2022-03-03 20:10:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:10:53,193 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 20:10:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:53,205 INFO L225 Difference]: With dead ends: 5077 [2022-03-03 20:10:53,205 INFO L226 Difference]: Without dead ends: 5005 [2022-03-03 20:10:53,205 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 20:10:53,206 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 20:10:53,206 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 20:10:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2022-03-03 20:10:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 3803. [2022-03-03 20:10:53,278 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 20:10:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 14005 transitions. [2022-03-03 20:10:53,287 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 14005 transitions. Word has length 26 [2022-03-03 20:10:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:53,287 INFO L470 AbstractCegarLoop]: Abstraction has 3803 states and 14005 transitions. [2022-03-03 20:10:53,287 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 20:10:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 14005 transitions. [2022-03-03 20:10:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:53,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:53,293 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 20:10:53,315 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 20:10:53,507 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 20:10:53,507 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1643224858, now seen corresponding path program 35 times [2022-03-03 20:10:53,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:53,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085195939] [2022-03-03 20:10:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:53,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:53,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085195939] [2022-03-03 20:10:53,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085195939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:53,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533122047] [2022-03-03 20:10:53,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:10:53,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:53,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:53,912 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 20:10:53,947 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 20:10:53,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:10:53,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:53,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:10:53,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:54,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:54,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:54,393 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 20:10:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:54,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:55,333 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:10:55,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:10:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:56,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533122047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:56,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:56,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 20:10:56,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611317964] [2022-03-03 20:10:56,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:56,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:10:56,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:10:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:10:56,861 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 20:10:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:59,174 INFO L93 Difference]: Finished difference Result 5945 states and 20361 transitions. [2022-03-03 20:10:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 20:10:59,174 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 20:10:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:59,187 INFO L225 Difference]: With dead ends: 5945 [2022-03-03 20:10:59,187 INFO L226 Difference]: Without dead ends: 5895 [2022-03-03 20:10:59,187 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 20:10:59,188 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 20:10:59,188 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 20:10:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-03-03 20:10:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 3811. [2022-03-03 20:10:59,258 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 20:10:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 14025 transitions. [2022-03-03 20:10:59,268 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 14025 transitions. Word has length 26 [2022-03-03 20:10:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:59,268 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 14025 transitions. [2022-03-03 20:10:59,268 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 20:10:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 14025 transitions. [2022-03-03 20:10:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:59,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:59,275 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 20:10:59,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:59,492 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 20:10:59,492 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:59,493 INFO L85 PathProgramCache]: Analyzing trace with hash 855040588, now seen corresponding path program 36 times [2022-03-03 20:10:59,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:59,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345920778] [2022-03-03 20:10:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:59,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:59,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:59,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345920778] [2022-03-03 20:10:59,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345920778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:59,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723093433] [2022-03-03 20:10:59,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:10:59,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:59,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:59,885 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 20:10:59,886 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 20:10:59,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:10:59,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:10:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:00,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:00,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:00,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:11:00,926 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 20:11:00,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:01,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:01,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:01,480 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 20:11:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:03,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723093433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:03,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:03,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-03 20:11:03,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57256895] [2022-03-03 20:11:03,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:03,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:11:03,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:03,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:11:03,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:11:03,504 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 20:11:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:08,402 INFO L93 Difference]: Finished difference Result 7624 states and 25602 transitions. [2022-03-03 20:11:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:11:08,402 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 20:11:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:08,418 INFO L225 Difference]: With dead ends: 7624 [2022-03-03 20:11:08,418 INFO L226 Difference]: Without dead ends: 7552 [2022-03-03 20:11:08,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1049, Invalid=5271, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 20:11:08,419 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 20:11:08,419 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 20:11:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7552 states. [2022-03-03 20:11:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7552 to 3729. [2022-03-03 20:11:08,540 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 20:11:08,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 13708 transitions. [2022-03-03 20:11:08,549 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 13708 transitions. Word has length 26 [2022-03-03 20:11:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:08,550 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 13708 transitions. [2022-03-03 20:11:08,550 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 20:11:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 13708 transitions. [2022-03-03 20:11:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:11:08,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:08,557 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 20:11:08,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-03 20:11:08,760 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 20:11:08,760 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:11:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1924650992, now seen corresponding path program 44 times [2022-03-03 20:11:08,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:08,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349739622] [2022-03-03 20:11:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:08,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:09,010 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 20:11:09,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:09,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349739622] [2022-03-03 20:11:09,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349739622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:09,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850337764] [2022-03-03 20:11:09,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:11:09,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:09,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:09,012 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 20:11:09,013 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 20:11:09,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:11:09,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:09,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:11:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:09,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:09,412 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 20:11:10,127 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 20:11:10,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:10,659 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:11:10,659 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 20:11:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:11,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850337764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:11,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:11,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-03 20:11:11,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880168660] [2022-03-03 20:11:11,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:11,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:11:11,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:11:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:11:11,333 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 20:11:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:26,363 INFO L93 Difference]: Finished difference Result 8392 states and 28354 transitions. [2022-03-03 20:11:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-03-03 20:11:26,363 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 20:11:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:26,382 INFO L225 Difference]: With dead ends: 8392 [2022-03-03 20:11:26,382 INFO L226 Difference]: Without dead ends: 8324 [2022-03-03 20:11:26,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16099 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=5548, Invalid=32672, Unknown=0, NotChecked=0, Total=38220 [2022-03-03 20:11:26,384 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 533 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:26,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 881 Invalid, 3336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 20:11:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8324 states. [2022-03-03 20:11:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8324 to 3825. [2022-03-03 20:11:26,485 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 20:11:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 14045 transitions. [2022-03-03 20:11:26,495 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 14045 transitions. Word has length 26 [2022-03-03 20:11:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:26,495 INFO L470 AbstractCegarLoop]: Abstraction has 3825 states and 14045 transitions. [2022-03-03 20:11:26,495 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 20:11:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 14045 transitions. [2022-03-03 20:11:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:11:26,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:26,501 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 20:11:26,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-03 20:11:26,717 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 20:11:26,717 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:11:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:26,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1576521584, now seen corresponding path program 45 times [2022-03-03 20:11:26,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:26,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101285104] [2022-03-03 20:11:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:26,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:26,933 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 20:11:26,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:26,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101285104] [2022-03-03 20:11:26,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101285104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:26,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860404805] [2022-03-03 20:11:26,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:11:26,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:26,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:26,935 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 20:11:26,936 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 20:11:26,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:11:26,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:26,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:11:26,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:27,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:27,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:11:31,087 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 20:11:31,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:32,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:32,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:32,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:32,277 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 20:11:32,601 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 20:11:32,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860404805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:32,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:32,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2022-03-03 20:11:32,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989991490] [2022-03-03 20:11:32,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:32,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 20:11:32,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:32,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 20:11:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:11:32,602 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 20:11:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:59,762 INFO L93 Difference]: Finished difference Result 12957 states and 43362 transitions. [2022-03-03 20:11:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-03-03 20:11:59,762 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 20:11:59,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:59,795 INFO L225 Difference]: With dead ends: 12957 [2022-03-03 20:11:59,795 INFO L226 Difference]: Without dead ends: 12868 [2022-03-03 20:11:59,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 42 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 36416 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=10227, Invalid=61865, Unknown=0, NotChecked=0, Total=72092 [2022-03-03 20:11:59,798 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 20:11:59,798 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 20:11:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12868 states. [2022-03-03 20:11:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12868 to 3970. [2022-03-03 20:11:59,944 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 20:11:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 14579 transitions. [2022-03-03 20:11:59,954 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 14579 transitions. Word has length 26 [2022-03-03 20:11:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:59,955 INFO L470 AbstractCegarLoop]: Abstraction has 3970 states and 14579 transitions. [2022-03-03 20:11:59,955 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 20:11:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 14579 transitions. [2022-03-03 20:11:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:11:59,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:59,961 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 20:11:59,977 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 20:12:00,177 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 20:12:00,178 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:00,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash 933591496, now seen corresponding path program 46 times [2022-03-03 20:12:00,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:00,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249489514] [2022-03-03 20:12:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:00,466 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 20:12:00,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:00,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249489514] [2022-03-03 20:12:00,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249489514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:00,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169870168] [2022-03-03 20:12:00,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:12:00,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:00,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:00,468 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 20:12:00,471 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 20:12:00,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:12:00,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:00,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:12:00,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:01,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:01,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:01,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:01,066 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 20:12:01,142 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 20:12:01,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:01,540 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:12:01,540 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 20:12:02,042 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 20:12:02,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169870168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:02,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:02,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:12:02,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9957921] [2022-03-03 20:12:02,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:02,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:12:02,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:12:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:12:02,043 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 20:12:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:09,585 INFO L93 Difference]: Finished difference Result 6681 states and 23043 transitions. [2022-03-03 20:12:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 20:12:09,585 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 20:12:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:09,599 INFO L225 Difference]: With dead ends: 6681 [2022-03-03 20:12:09,599 INFO L226 Difference]: Without dead ends: 6644 [2022-03-03 20:12:09,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5341 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2128, Invalid=11914, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 20:12:09,600 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 533 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:09,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 546 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2318 Invalid, 0 Unknown, 84 Unchecked, 1.2s Time] [2022-03-03 20:12:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2022-03-03 20:12:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 3968. [2022-03-03 20:12:09,677 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 20:12:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14578 transitions. [2022-03-03 20:12:09,686 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14578 transitions. Word has length 26 [2022-03-03 20:12:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:09,686 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 14578 transitions. [2022-03-03 20:12:09,686 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 20:12:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14578 transitions. [2022-03-03 20:12:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:09,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:09,693 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 20:12:09,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:09,907 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 20:12:09,907 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1662477820, now seen corresponding path program 47 times [2022-03-03 20:12:09,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:09,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891665420] [2022-03-03 20:12:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:09,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:10,095 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 20:12:10,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:10,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891665420] [2022-03-03 20:12:10,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891665420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:10,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144135367] [2022-03-03 20:12:10,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:12:10,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:10,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:10,097 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 20:12:10,098 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 20:12:10,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:12:10,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:10,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:12:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:10,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:10,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:10,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:10,536 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 20:12:11,112 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 20:12:11,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:11,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:11,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:11,873 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 20:12:11,899 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 20:12:11,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144135367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:11,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:11,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 26 [2022-03-03 20:12:11,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401760380] [2022-03-03 20:12:11,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:11,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:12:11,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:12:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:12:11,902 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 20:12:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:14,014 INFO L93 Difference]: Finished difference Result 5911 states and 20811 transitions. [2022-03-03 20:12:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:12:14,014 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 20:12:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:14,026 INFO L225 Difference]: With dead ends: 5911 [2022-03-03 20:12:14,026 INFO L226 Difference]: Without dead ends: 5881 [2022-03-03 20:12:14,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 20:12:14,027 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 330 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:14,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 334 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 844 Invalid, 0 Unknown, 408 Unchecked, 0.3s Time] [2022-03-03 20:12:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2022-03-03 20:12:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 3978. [2022-03-03 20:12:14,098 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 20:12:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 14613 transitions. [2022-03-03 20:12:14,108 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 14613 transitions. Word has length 26 [2022-03-03 20:12:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:14,108 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 14613 transitions. [2022-03-03 20:12:14,108 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 20:12:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 14613 transitions. [2022-03-03 20:12:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:14,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:14,115 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 20:12:14,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:14,331 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 20:12:14,332 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash 935903172, now seen corresponding path program 37 times [2022-03-03 20:12:14,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:14,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119200933] [2022-03-03 20:12:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:14,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:14,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:14,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119200933] [2022-03-03 20:12:14,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119200933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:14,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833216981] [2022-03-03 20:12:14,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:12:14,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:14,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:14,673 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 20:12:14,674 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 20:12:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:14,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:12:14,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:15,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:15,129 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 20:12:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:15,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:15,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:15,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:15,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:15,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:12:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:16,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833216981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:16,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:16,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-03 20:12:16,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840124816] [2022-03-03 20:12:16,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:16,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:12:16,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:16,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:12:16,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:12:16,500 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 20:12:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:20,271 INFO L93 Difference]: Finished difference Result 6734 states and 23271 transitions. [2022-03-03 20:12:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 20:12:20,271 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 20:12:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:20,285 INFO L225 Difference]: With dead ends: 6734 [2022-03-03 20:12:20,285 INFO L226 Difference]: Without dead ends: 6698 [2022-03-03 20:12:20,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=832, Invalid=3860, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:12:20,286 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 450 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:20,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 444 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1029 Invalid, 0 Unknown, 546 Unchecked, 0.6s Time] [2022-03-03 20:12:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6698 states. [2022-03-03 20:12:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6698 to 3974. [2022-03-03 20:12:20,361 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 20:12:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 14591 transitions. [2022-03-03 20:12:20,371 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 14591 transitions. Word has length 26 [2022-03-03 20:12:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:20,371 INFO L470 AbstractCegarLoop]: Abstraction has 3974 states and 14591 transitions. [2022-03-03 20:12:20,371 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 20:12:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 14591 transitions. [2022-03-03 20:12:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:20,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:20,378 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 20:12:20,394 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 20:12:20,593 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 20:12:20,594 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash 449327520, now seen corresponding path program 48 times [2022-03-03 20:12:20,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:20,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122343210] [2022-03-03 20:12:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:20,836 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 20:12:20,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:20,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122343210] [2022-03-03 20:12:20,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122343210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:20,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308886496] [2022-03-03 20:12:20,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:12:20,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:20,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:20,838 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 20:12:20,839 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 20:12:20,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:12:20,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:12:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:21,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:21,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:21,237 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 20:12:21,793 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 20:12:21,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:22,214 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:12:22,214 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 20:12:22,741 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 20:12:22,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308886496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:22,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:22,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-03 20:12:22,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629866086] [2022-03-03 20:12:22,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:22,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:12:22,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:22,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:12:22,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:12:22,743 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 20:12:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:35,875 INFO L93 Difference]: Finished difference Result 8216 states and 28116 transitions. [2022-03-03 20:12:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-03-03 20:12:35,875 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 20:12:35,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:35,891 INFO L225 Difference]: With dead ends: 8216 [2022-03-03 20:12:35,891 INFO L226 Difference]: Without dead ends: 8162 [2022-03-03 20:12:35,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14421 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5256, Invalid=29154, Unknown=0, NotChecked=0, Total=34410 [2022-03-03 20:12:35,893 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 635 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:35,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 589 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:12:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2022-03-03 20:12:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 3915. [2022-03-03 20:12:35,985 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 20:12:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 14367 transitions. [2022-03-03 20:12:35,995 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 14367 transitions. Word has length 26 [2022-03-03 20:12:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:35,995 INFO L470 AbstractCegarLoop]: Abstraction has 3915 states and 14367 transitions. [2022-03-03 20:12:35,995 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 20:12:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 14367 transitions. [2022-03-03 20:12:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:36,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:36,001 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 20:12:36,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:36,215 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 20:12:36,216 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1445850926, now seen corresponding path program 38 times [2022-03-03 20:12:36,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:36,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797028232] [2022-03-03 20:12:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:36,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:36,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797028232] [2022-03-03 20:12:36,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797028232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:36,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15847694] [2022-03-03 20:12:36,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:12:36,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:36,557 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 20:12:36,558 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 20:12:36,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:12:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:12:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:37,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:37,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:37,093 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 20:12:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:37,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:37,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:38,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:38,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:12:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:38,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15847694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:38,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:38,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-03 20:12:38,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375958966] [2022-03-03 20:12:38,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:38,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:12:38,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:12:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:12:38,806 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 20:12:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:43,811 INFO L93 Difference]: Finished difference Result 7328 states and 25133 transitions. [2022-03-03 20:12:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:12:43,811 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 20:12:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:43,827 INFO L225 Difference]: With dead ends: 7328 [2022-03-03 20:12:43,827 INFO L226 Difference]: Without dead ends: 7298 [2022-03-03 20:12:43,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=934, Invalid=4036, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 20:12:43,827 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 580 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:43,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 418 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 848 Invalid, 0 Unknown, 1035 Unchecked, 0.5s Time] [2022-03-03 20:12:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7298 states. [2022-03-03 20:12:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7298 to 3912. [2022-03-03 20:12:43,909 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 20:12:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 14357 transitions. [2022-03-03 20:12:43,920 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 14357 transitions. Word has length 26 [2022-03-03 20:12:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:43,920 INFO L470 AbstractCegarLoop]: Abstraction has 3912 states and 14357 transitions. [2022-03-03 20:12:43,920 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 20:12:43,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 14357 transitions. [2022-03-03 20:12:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:43,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:43,926 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 20:12:43,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-03 20:12:44,127 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 20:12:44,127 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 898886322, now seen corresponding path program 39 times [2022-03-03 20:12:44,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:44,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416652233] [2022-03-03 20:12:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:44,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:44,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:44,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416652233] [2022-03-03 20:12:44,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416652233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:44,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342911698] [2022-03-03 20:12:44,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:12:44,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:44,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:44,402 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 20:12:44,403 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 20:12:44,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:12:44,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:44,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:12:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:44,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:44,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:44,794 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 20:12:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:45,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:45,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:45,731 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 20:12:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:50,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342911698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:50,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:50,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-03 20:12:50,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270400743] [2022-03-03 20:12:50,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:50,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:12:50,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:50,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:12:50,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:12:50,807 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 20:13:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:04,909 INFO L93 Difference]: Finished difference Result 10739 states and 35315 transitions. [2022-03-03 20:13:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-03 20:13:04,909 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 20:13:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:04,931 INFO L225 Difference]: With dead ends: 10739 [2022-03-03 20:13:04,932 INFO L226 Difference]: Without dead ends: 10705 [2022-03-03 20:13:04,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8230 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=3448, Invalid=17722, Unknown=0, NotChecked=0, Total=21170 [2022-03-03 20:13:04,933 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 20:13:04,933 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 20:13:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2022-03-03 20:13:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 3884. [2022-03-03 20:13:05,047 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 20:13:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 14242 transitions. [2022-03-03 20:13:05,057 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 14242 transitions. Word has length 26 [2022-03-03 20:13:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:05,057 INFO L470 AbstractCegarLoop]: Abstraction has 3884 states and 14242 transitions. [2022-03-03 20:13:05,057 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 20:13:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 14242 transitions. [2022-03-03 20:13:05,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:05,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:05,063 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 20:13:05,080 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 20:13:05,279 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 20:13:05,279 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:05,279 INFO L85 PathProgramCache]: Analyzing trace with hash 764191466, now seen corresponding path program 40 times [2022-03-03 20:13:05,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:05,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422633382] [2022-03-03 20:13:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:05,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:05,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:05,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422633382] [2022-03-03 20:13:05,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422633382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:05,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377199346] [2022-03-03 20:13:05,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:13:05,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:05,618 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 20:13:05,619 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 20:13:05,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:13:05,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:13:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:06,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:06,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:06,206 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 20:13:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:06,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:07,024 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:13:07,024 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 20:13:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:08,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377199346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:08,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:08,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:13:08,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374354609] [2022-03-03 20:13:08,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:08,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:13:08,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:13:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:13:08,587 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 20:13:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:11,268 INFO L93 Difference]: Finished difference Result 6453 states and 22188 transitions. [2022-03-03 20:13:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:13:11,268 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 20:13:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:11,280 INFO L225 Difference]: With dead ends: 6453 [2022-03-03 20:13:11,280 INFO L226 Difference]: Without dead ends: 6408 [2022-03-03 20:13:11,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=691, Invalid=4421, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:13:11,281 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 312 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:11,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 356 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:13:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2022-03-03 20:13:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 3886. [2022-03-03 20:13:11,347 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 20:13:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 14261 transitions. [2022-03-03 20:13:11,355 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 14261 transitions. Word has length 26 [2022-03-03 20:13:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:11,356 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 14261 transitions. [2022-03-03 20:13:11,356 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 20:13:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 14261 transitions. [2022-03-03 20:13:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:11,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:11,362 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 20:13:11,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:11,575 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 20:13:11,575 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:11,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 41 times [2022-03-03 20:13:11,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:11,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375976354] [2022-03-03 20:13:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:11,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:11,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:11,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375976354] [2022-03-03 20:13:11,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375976354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:11,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760348439] [2022-03-03 20:13:11,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:13:11,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:11,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:11,710 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 20:13:11,731 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 20:13:11,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:13:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:11,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:13:11,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:12,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:12,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:12,171 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 20:13:12,241 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 20:13:12,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:12,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:12,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:12,548 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 20:13:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:13,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760348439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:13,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:13,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:13:13,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737047097] [2022-03-03 20:13:13,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:13,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:13:13,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:13:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:13:13,451 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 20:13:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:19,580 INFO L93 Difference]: Finished difference Result 7468 states and 24715 transitions. [2022-03-03 20:13:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 20:13:19,580 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 20:13:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:19,595 INFO L225 Difference]: With dead ends: 7468 [2022-03-03 20:13:19,596 INFO L226 Difference]: Without dead ends: 7324 [2022-03-03 20:13:19,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1647, Invalid=10125, Unknown=0, NotChecked=0, Total=11772 [2022-03-03 20:13:19,597 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 423 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:19,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 435 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:13:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2022-03-03 20:13:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 3965. [2022-03-03 20:13:19,678 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 20:13:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3965 states to 3965 states and 14525 transitions. [2022-03-03 20:13:19,687 INFO L78 Accepts]: Start accepts. Automaton has 3965 states and 14525 transitions. Word has length 26 [2022-03-03 20:13:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:19,687 INFO L470 AbstractCegarLoop]: Abstraction has 3965 states and 14525 transitions. [2022-03-03 20:13:19,687 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 20:13:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3965 states and 14525 transitions. [2022-03-03 20:13:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:19,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:19,693 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, 1, 1] [2022-03-03 20:13:19,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-03 20:13:19,909 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 20:13:19,909 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash -384612468, now seen corresponding path program 42 times [2022-03-03 20:13:19,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:19,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429397466] [2022-03-03 20:13:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:20,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:20,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429397466] [2022-03-03 20:13:20,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429397466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:20,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69259805] [2022-03-03 20:13:20,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:13:20,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:20,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:20,067 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 20:13:20,067 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 20:13:20,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:13:20,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:13:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:20,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:20,466 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 20:13:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:21,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:21,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:21,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:21,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:21,687 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 20:13:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:22,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69259805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:22,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:22,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-03 20:13:22,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521967839] [2022-03-03 20:13:22,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:22,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 20:13:22,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 20:13:22,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-03-03 20:13:22,463 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 20:13:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:30,815 INFO L93 Difference]: Finished difference Result 7287 states and 24926 transitions. [2022-03-03 20:13:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 20:13:30,816 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 20:13:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:30,831 INFO L225 Difference]: With dead ends: 7287 [2022-03-03 20:13:30,831 INFO L226 Difference]: Without dead ends: 7226 [2022-03-03 20:13:30,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1529, Invalid=7783, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 20:13:30,832 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 433 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:30,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 704 Invalid, 3615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-03 20:13:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2022-03-03 20:13:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 4020. [2022-03-03 20:13:30,909 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 20:13:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 14705 transitions. [2022-03-03 20:13:30,919 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 14705 transitions. Word has length 26 [2022-03-03 20:13:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:30,919 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 14705 transitions. [2022-03-03 20:13:30,919 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 20:13:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 14705 transitions. [2022-03-03 20:13:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:30,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:30,926 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 20:13:30,944 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 20:13:31,142 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 20:13:31,142 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:31,142 INFO L85 PathProgramCache]: Analyzing trace with hash -404580494, now seen corresponding path program 43 times [2022-03-03 20:13:31,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:31,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740355239] [2022-03-03 20:13:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:31,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:31,283 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 20:13:31,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:31,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740355239] [2022-03-03 20:13:31,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740355239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:31,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461544680] [2022-03-03 20:13:31,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:13:31,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:31,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:31,285 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 20:13:31,286 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 20:13:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:31,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:13:31,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:31,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:31,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:31,649 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 20:13:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:31,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:32,275 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:13:32,276 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 20:13:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:33,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461544680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:33,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:33,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 20:13:33,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890650673] [2022-03-03 20:13:33,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:33,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:13:33,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:13:33,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:13:33,398 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 20:13:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:34,996 INFO L93 Difference]: Finished difference Result 5854 states and 20230 transitions. [2022-03-03 20:13:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 20:13:34,997 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 20:13:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:35,007 INFO L225 Difference]: With dead ends: 5854 [2022-03-03 20:13:35,007 INFO L226 Difference]: Without dead ends: 5804 [2022-03-03 20:13:35,007 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 20:13:35,008 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 20:13:35,008 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 20:13:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2022-03-03 20:13:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 4039. [2022-03-03 20:13:35,065 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 20:13:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 14777 transitions. [2022-03-03 20:13:35,074 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 14777 transitions. Word has length 26 [2022-03-03 20:13:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:35,074 INFO L470 AbstractCegarLoop]: Abstraction has 4039 states and 14777 transitions. [2022-03-03 20:13:35,074 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 20:13:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 14777 transitions. [2022-03-03 20:13:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:35,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:35,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:35,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:35,296 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 20:13:35,296 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1484986580, now seen corresponding path program 44 times [2022-03-03 20:13:35,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:35,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94421164] [2022-03-03 20:13:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:35,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:35,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:35,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94421164] [2022-03-03 20:13:35,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94421164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:35,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484984640] [2022-03-03 20:13:35,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:13:35,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:35,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:35,454 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 20:13:35,455 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 20:13:35,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:13:35,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:35,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:13:35,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:35,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:35,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:35,840 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 20:13:36,152 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 20:13:36,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:36,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:36,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:36,409 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 20:13:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:37,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484984640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:37,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:37,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:13:37,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586604855] [2022-03-03 20:13:37,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:37,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:13:37,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:13:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:13:37,504 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 20:13:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:39,811 INFO L93 Difference]: Finished difference Result 6491 states and 22205 transitions. [2022-03-03 20:13:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 20:13:39,811 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 20:13:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:39,824 INFO L225 Difference]: With dead ends: 6491 [2022-03-03 20:13:39,824 INFO L226 Difference]: Without dead ends: 6403 [2022-03-03 20:13:39,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 20:13:39,825 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 285 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 20:13:39,825 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 20:13:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2022-03-03 20:13:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 4095. [2022-03-03 20:13:39,890 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 20:13:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 14973 transitions. [2022-03-03 20:13:39,899 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 14973 transitions. Word has length 26 [2022-03-03 20:13:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:39,899 INFO L470 AbstractCegarLoop]: Abstraction has 4095 states and 14973 transitions. [2022-03-03 20:13:39,899 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 20:13:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 14973 transitions. [2022-03-03 20:13:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:39,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:39,905 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 20:13:39,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:40,121 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 20:13:40,121 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:40,122 INFO L85 PathProgramCache]: Analyzing trace with hash 367617680, now seen corresponding path program 45 times [2022-03-03 20:13:40,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:40,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110501608] [2022-03-03 20:13:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:40,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:40,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:40,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110501608] [2022-03-03 20:13:40,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110501608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:40,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093893649] [2022-03-03 20:13:40,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:13:40,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:40,299 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 20:13:40,300 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 20:13:40,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:13:40,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:40,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:13:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:40,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:40,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:40,585 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 20:13:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:41,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:41,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:41,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:13:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:59,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093893649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:59,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:59,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:13:59,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303180903] [2022-03-03 20:13:59,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:59,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:13:59,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:59,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:13:59,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:13:59,865 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 20:14:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:02,869 INFO L93 Difference]: Finished difference Result 6478 states and 22229 transitions. [2022-03-03 20:14:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:14:02,870 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 20:14:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:02,883 INFO L225 Difference]: With dead ends: 6478 [2022-03-03 20:14:02,883 INFO L226 Difference]: Without dead ends: 6407 [2022-03-03 20:14:02,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=733, Invalid=2927, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:14:02,883 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 364 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 20:14:02,883 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 20:14:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2022-03-03 20:14:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 4098. [2022-03-03 20:14:02,955 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 20:14:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 14982 transitions. [2022-03-03 20:14:02,964 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 14982 transitions. Word has length 26 [2022-03-03 20:14:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:02,964 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 14982 transitions. [2022-03-03 20:14:02,965 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 20:14:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 14982 transitions. [2022-03-03 20:14:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:02,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:02,971 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 20:14:02,987 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 20:14:03,186 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 20:14:03,186 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 46 times [2022-03-03 20:14:03,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:03,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71702801] [2022-03-03 20:14:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:03,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:03,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:03,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71702801] [2022-03-03 20:14:03,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71702801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:03,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127516007] [2022-03-03 20:14:03,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:14:03,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:03,277 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 20:14:03,278 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 20:14:03,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:14:03,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:14:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:03,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:03,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:03,716 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 20:14:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:03,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:03,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:04,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:04,010 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 20:14:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:08,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127516007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:08,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:08,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:14:08,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877959521] [2022-03-03 20:14:08,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:08,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:14:08,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:08,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:14:08,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:14:08,489 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 20:14:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:10,710 INFO L93 Difference]: Finished difference Result 6144 states and 21159 transitions. [2022-03-03 20:14:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 20:14:10,711 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 20:14:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:10,722 INFO L225 Difference]: With dead ends: 6144 [2022-03-03 20:14:10,722 INFO L226 Difference]: Without dead ends: 6054 [2022-03-03 20:14:10,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:14:10,723 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 20:14:10,723 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 20:14:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2022-03-03 20:14:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 4123. [2022-03-03 20:14:10,790 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 20:14:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 15058 transitions. [2022-03-03 20:14:10,800 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 15058 transitions. Word has length 26 [2022-03-03 20:14:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:10,800 INFO L470 AbstractCegarLoop]: Abstraction has 4123 states and 15058 transitions. [2022-03-03 20:14:10,800 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 20:14:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 15058 transitions. [2022-03-03 20:14:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:10,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:10,807 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 20:14:10,823 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 20:14:11,015 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 20:14:11,015 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash -742785592, now seen corresponding path program 47 times [2022-03-03 20:14:11,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:11,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613861001] [2022-03-03 20:14:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:11,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:11,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613861001] [2022-03-03 20:14:11,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613861001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:11,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105139535] [2022-03-03 20:14:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:14:11,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:11,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:11,168 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 20:14:11,169 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 20:14:11,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:14:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:14:11,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:11,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:11,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:11,571 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 20:14:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:11,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:11,963 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:14:11,963 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 20:14:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:15,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105139535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:15,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:15,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:14:15,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687124803] [2022-03-03 20:14:15,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:15,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:14:15,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:14:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:14:15,257 INFO L87 Difference]: Start difference. First operand 4123 states and 15058 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 20:14:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:19,864 INFO L93 Difference]: Finished difference Result 7473 states and 25468 transitions. [2022-03-03 20:14:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:14:19,864 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 20:14:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:19,878 INFO L225 Difference]: With dead ends: 7473 [2022-03-03 20:14:19,878 INFO L226 Difference]: Without dead ends: 7428 [2022-03-03 20:14:19,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=976, Invalid=5830, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 20:14:19,879 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 292 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1843 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:19,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 433 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1843 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:14:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7428 states. [2022-03-03 20:14:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7428 to 4156. [2022-03-03 20:14:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4156 states, 4155 states have (on average 3.65439229843562) internal successors, (15184), 4155 states have internal predecessors, (15184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4156 states to 4156 states and 15184 transitions. [2022-03-03 20:14:19,964 INFO L78 Accepts]: Start accepts. Automaton has 4156 states and 15184 transitions. Word has length 26 [2022-03-03 20:14:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:19,964 INFO L470 AbstractCegarLoop]: Abstraction has 4156 states and 15184 transitions. [2022-03-03 20:14:19,964 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 20:14:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4156 states and 15184 transitions. [2022-03-03 20:14:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:19,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:19,970 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 20:14:19,986 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 20:14:20,183 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 20:14:20,183 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 48 times [2022-03-03 20:14:20,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:20,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260523647] [2022-03-03 20:14:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:20,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:20,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260523647] [2022-03-03 20:14:20,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260523647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:20,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985839819] [2022-03-03 20:14:20,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:14:20,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:20,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:20,319 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:20,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 20:14:20,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:14:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:14:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:20,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:20,660 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 20:14:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:20,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:21,049 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:14:21,050 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 199 treesize of output 157 [2022-03-03 20:14:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:24,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985839819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:24,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:24,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:14:24,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197500142] [2022-03-03 20:14:24,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:24,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:14:24,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:14:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:14:24,543 INFO L87 Difference]: Start difference. First operand 4156 states and 15184 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 20:14:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:27,793 INFO L93 Difference]: Finished difference Result 7094 states and 24232 transitions. [2022-03-03 20:14:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:14:27,793 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 20:14:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:27,806 INFO L225 Difference]: With dead ends: 7094 [2022-03-03 20:14:27,806 INFO L226 Difference]: Without dead ends: 7010 [2022-03-03 20:14:27,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=700, Invalid=3590, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:14:27,807 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 326 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:27,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 222 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 912 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-03-03 20:14:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7010 states. [2022-03-03 20:14:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7010 to 4198. [2022-03-03 20:14:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 4197 states have (on average 3.6516559447224206) internal successors, (15326), 4197 states have internal predecessors, (15326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 15326 transitions. [2022-03-03 20:14:27,890 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 15326 transitions. Word has length 26 [2022-03-03 20:14:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:27,890 INFO L470 AbstractCegarLoop]: Abstraction has 4198 states and 15326 transitions. [2022-03-03 20:14:27,890 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 20:14:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 15326 transitions. [2022-03-03 20:14:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:27,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:27,897 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 20:14:27,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:28,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:28,113 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:28,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 49 times [2022-03-03 20:14:28,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:28,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219750410] [2022-03-03 20:14:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:28,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:28,275 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 20:14:28,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:28,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219750410] [2022-03-03 20:14:28,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219750410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:28,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916952224] [2022-03-03 20:14:28,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:14:28,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:28,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:28,277 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:28,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 20:14:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:14:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:28,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:28,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:28,810 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 20:14:28,926 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 20:14:28,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:29,464 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:14:29,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-03-03 20:14:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:31,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916952224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:31,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:31,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:14:31,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624241780] [2022-03-03 20:14:31,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:31,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:14:31,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:14:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:14:31,437 INFO L87 Difference]: Start difference. First operand 4198 states and 15326 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 20:14:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:32,722 INFO L93 Difference]: Finished difference Result 6519 states and 22584 transitions. [2022-03-03 20:14:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 20:14:32,722 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 20:14:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:32,736 INFO L225 Difference]: With dead ends: 6519 [2022-03-03 20:14:32,736 INFO L226 Difference]: Without dead ends: 6474 [2022-03-03 20:14:32,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:14:32,737 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 173 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:32,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 244 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 824 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-03-03 20:14:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2022-03-03 20:14:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 4225. [2022-03-03 20:14:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4224 states have (on average 3.6503314393939394) internal successors, (15419), 4224 states have internal predecessors, (15419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 15419 transitions. [2022-03-03 20:14:32,823 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 15419 transitions. Word has length 26 [2022-03-03 20:14:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:32,823 INFO L470 AbstractCegarLoop]: Abstraction has 4225 states and 15419 transitions. [2022-03-03 20:14:32,824 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 20:14:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 15419 transitions. [2022-03-03 20:14:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:32,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:32,830 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, 1, 1] [2022-03-03 20:14:32,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:33,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:33,043 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 50 times [2022-03-03 20:14:33,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:33,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899724939] [2022-03-03 20:14:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:33,222 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 20:14:33,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:33,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899724939] [2022-03-03 20:14:33,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899724939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:33,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020972018] [2022-03-03 20:14:33,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:14:33,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:33,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:33,223 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:33,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 20:14:33,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:14:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:33,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:14:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:33,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:33,565 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 20:14:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:33,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:34,044 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:14:34,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:14:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:36,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020972018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:36,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:36,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:14:36,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176904993] [2022-03-03 20:14:36,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:36,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:14:36,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:14:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:14:36,693 INFO L87 Difference]: Start difference. First operand 4225 states and 15419 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 20:14:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:39,495 INFO L93 Difference]: Finished difference Result 6602 states and 22875 transitions. [2022-03-03 20:14:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:14:39,496 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 20:14:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:39,509 INFO L225 Difference]: With dead ends: 6602 [2022-03-03 20:14:39,509 INFO L226 Difference]: Without dead ends: 6572 [2022-03-03 20:14:39,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=610, Invalid=3550, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 20:14:39,509 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 246 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:39,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 344 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:14:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2022-03-03 20:14:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 4255. [2022-03-03 20:14:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 4254 states have (on average 3.6492712740949695) internal successors, (15524), 4254 states have internal predecessors, (15524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 15524 transitions. [2022-03-03 20:14:39,579 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 15524 transitions. Word has length 26 [2022-03-03 20:14:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:39,579 INFO L470 AbstractCegarLoop]: Abstraction has 4255 states and 15524 transitions. [2022-03-03 20:14:39,579 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 20:14:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 15524 transitions. [2022-03-03 20:14:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:39,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:39,585 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 20:14:39,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-03 20:14:39,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-03 20:14:39,800 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:39,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:39,800 INFO L85 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 51 times [2022-03-03 20:14:39,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:39,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552518264] [2022-03-03 20:14:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:39,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:39,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552518264] [2022-03-03 20:14:39,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552518264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:39,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901524347] [2022-03-03 20:14:39,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:14:39,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:39,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:39,987 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:39,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 20:14:40,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:14:40,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:14:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:40,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:40,441 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 20:14:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:40,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:41,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:41,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:41,189 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 157 [2022-03-03 20:14:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:44,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901524347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:44,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:44,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:14:44,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193323389] [2022-03-03 20:14:44,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:44,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:14:44,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:14:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:14:44,175 INFO L87 Difference]: Start difference. First operand 4255 states and 15524 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 20:14:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:46,149 INFO L93 Difference]: Finished difference Result 6316 states and 21844 transitions. [2022-03-03 20:14:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 20:14:46,150 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 20:14:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:46,163 INFO L225 Difference]: With dead ends: 6316 [2022-03-03 20:14:46,163 INFO L226 Difference]: Without dead ends: 6240 [2022-03-03 20:14:46,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=489, Invalid=2163, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:14:46,164 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 232 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:46,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 303 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 768 Invalid, 0 Unknown, 370 Unchecked, 0.4s Time] [2022-03-03 20:14:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6240 states. [2022-03-03 20:14:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6240 to 4285. [2022-03-03 20:14:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4285 states, 4284 states have (on average 3.6514939309056955) internal successors, (15643), 4284 states have internal predecessors, (15643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4285 states to 4285 states and 15643 transitions. [2022-03-03 20:14:46,249 INFO L78 Accepts]: Start accepts. Automaton has 4285 states and 15643 transitions. Word has length 26 [2022-03-03 20:14:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:46,250 INFO L470 AbstractCegarLoop]: Abstraction has 4285 states and 15643 transitions. [2022-03-03 20:14:46,250 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 20:14:46,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4285 states and 15643 transitions. [2022-03-03 20:14:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:46,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:46,257 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 20:14:46,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:46,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:46,471 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 52 times [2022-03-03 20:14:46,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:46,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582032066] [2022-03-03 20:14:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:46,661 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 20:14:46,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:46,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582032066] [2022-03-03 20:14:46,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582032066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:46,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635600589] [2022-03-03 20:14:46,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:14:46,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:46,665 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:46,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 20:14:46,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:14:46,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:46,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:14:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:47,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:47,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:47,049 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 20:14:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:47,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:47,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:47,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:47,558 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 157 [2022-03-03 20:14:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:48,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635600589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:48,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:48,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:14:48,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108158147] [2022-03-03 20:14:48,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:48,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:14:48,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:14:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:14:48,906 INFO L87 Difference]: Start difference. First operand 4285 states and 15643 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:50,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:50,690 INFO L93 Difference]: Finished difference Result 6424 states and 22271 transitions. [2022-03-03 20:14:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 20:14:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:14:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:50,704 INFO L225 Difference]: With dead ends: 6424 [2022-03-03 20:14:50,704 INFO L226 Difference]: Without dead ends: 6364 [2022-03-03 20:14:50,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=519, Invalid=2343, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 20:14:50,705 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:50,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 359 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 910 Invalid, 0 Unknown, 403 Unchecked, 0.4s Time] [2022-03-03 20:14:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6364 states. [2022-03-03 20:14:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6364 to 4347. [2022-03-03 20:14:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 3.651863782788771) internal successors, (15871), 4346 states have internal predecessors, (15871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 15871 transitions. [2022-03-03 20:14:50,808 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 15871 transitions. Word has length 26 [2022-03-03 20:14:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:50,809 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 15871 transitions. [2022-03-03 20:14:50,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 15871 transitions. [2022-03-03 20:14:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:50,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:50,816 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 20:14:50,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:51,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-03 20:14:51,027 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash 635089588, now seen corresponding path program 53 times [2022-03-03 20:14:51,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:51,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834359803] [2022-03-03 20:14:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:51,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:51,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:51,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834359803] [2022-03-03 20:14:51,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834359803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:51,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67356071] [2022-03-03 20:14:51,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:14:51,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:51,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:51,291 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:51,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 20:14:51,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:14:51,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:14:51,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:51,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:51,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:51,639 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 20:14:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:51,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:52,012 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:14:52,012 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 199 treesize of output 157 [2022-03-03 20:14:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:55,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67356071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:55,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:55,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:14:55,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666270102] [2022-03-03 20:14:55,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:55,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:14:55,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:14:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:14:55,544 INFO L87 Difference]: Start difference. First operand 4347 states and 15871 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 20:14:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:57,314 INFO L93 Difference]: Finished difference Result 6751 states and 23397 transitions. [2022-03-03 20:14:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:14:57,314 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 20:14:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:57,330 INFO L225 Difference]: With dead ends: 6751 [2022-03-03 20:14:57,330 INFO L226 Difference]: Without dead ends: 6706 [2022-03-03 20:14:57,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:14:57,331 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:57,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 348 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1239 Invalid, 0 Unknown, 253 Unchecked, 0.6s Time] [2022-03-03 20:14:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6706 states. [2022-03-03 20:14:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6706 to 4344. [2022-03-03 20:14:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4344 states, 4343 states have (on average 3.65162330186507) internal successors, (15859), 4343 states have internal predecessors, (15859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4344 states to 4344 states and 15859 transitions. [2022-03-03 20:14:57,423 INFO L78 Accepts]: Start accepts. Automaton has 4344 states and 15859 transitions. Word has length 26 [2022-03-03 20:14:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:57,423 INFO L470 AbstractCegarLoop]: Abstraction has 4344 states and 15859 transitions. [2022-03-03 20:14:57,423 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 20:14:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4344 states and 15859 transitions. [2022-03-03 20:14:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:57,431 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:57,431 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 20:14:57,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:57,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-03 20:14:57,648 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1631433958, now seen corresponding path program 54 times [2022-03-03 20:14:57,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:57,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946945896] [2022-03-03 20:14:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:57,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:57,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946945896] [2022-03-03 20:14:57,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946945896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:57,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992362495] [2022-03-03 20:14:57,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:14:57,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:57,837 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:57,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-03 20:14:57,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:14:57,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:14:57,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:58,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:58,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:58,198 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 20:14:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:58,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:58,885 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:14:58,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-03-03 20:15:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:01,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992362495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:01,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:01,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:15:01,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952927760] [2022-03-03 20:15:01,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:01,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:15:01,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:01,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:15:01,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:15:01,686 INFO L87 Difference]: Start difference. First operand 4344 states and 15859 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 20:15:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:04,654 INFO L93 Difference]: Finished difference Result 7020 states and 24201 transitions. [2022-03-03 20:15:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:15:04,655 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 20:15:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:04,670 INFO L225 Difference]: With dead ends: 7020 [2022-03-03 20:15:04,670 INFO L226 Difference]: Without dead ends: 6980 [2022-03-03 20:15:04,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=615, Invalid=3167, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 20:15:04,671 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 253 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:04,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 368 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:15:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6980 states. [2022-03-03 20:15:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6980 to 4348. [2022-03-03 20:15:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 3.6514837819185644) internal successors, (15873), 4347 states have internal predecessors, (15873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 15873 transitions. [2022-03-03 20:15:04,760 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 15873 transitions. Word has length 26 [2022-03-03 20:15:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:04,760 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 15873 transitions. [2022-03-03 20:15:04,760 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 20:15:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 15873 transitions. [2022-03-03 20:15:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:04,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:04,767 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 20:15:04,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:04,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-03 20:15:04,970 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 49 times [2022-03-03 20:15:04,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:04,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005528686] [2022-03-03 20:15:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:04,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:05,161 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 20:15:05,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:05,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005528686] [2022-03-03 20:15:05,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005528686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:05,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477547623] [2022-03-03 20:15:05,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:15:05,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:05,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:05,162 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:05,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-03 20:15:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:05,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:15:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:05,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:15:05,735 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 20:15:05,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:05,957 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:15:05,957 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 20:15:06,679 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 20:15:06,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477547623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:06,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:06,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-03 20:15:06,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643582938] [2022-03-03 20:15:06,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:06,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:15:06,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:06,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:15:06,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:15:06,680 INFO L87 Difference]: Start difference. First operand 4348 states and 15873 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:07,973 INFO L93 Difference]: Finished difference Result 5469 states and 19033 transitions. [2022-03-03 20:15:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:15:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:07,985 INFO L225 Difference]: With dead ends: 5469 [2022-03-03 20:15:07,986 INFO L226 Difference]: Without dead ends: 5439 [2022-03-03 20:15:07,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:15:07,986 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 241 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:07,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 266 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:15:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5439 states. [2022-03-03 20:15:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5439 to 4364. [2022-03-03 20:15:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 3.649553059821224) internal successors, (15923), 4363 states have internal predecessors, (15923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 15923 transitions. [2022-03-03 20:15:08,085 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 15923 transitions. Word has length 26 [2022-03-03 20:15:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:08,085 INFO L470 AbstractCegarLoop]: Abstraction has 4364 states and 15923 transitions. [2022-03-03 20:15:08,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 15923 transitions. [2022-03-03 20:15:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:08,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:08,093 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 20:15:08,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:08,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:08,307 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:08,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 50 times [2022-03-03 20:15:08,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:08,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903434640] [2022-03-03 20:15:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:08,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:08,476 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 20:15:08,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:08,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903434640] [2022-03-03 20:15:08,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903434640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:08,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117524517] [2022-03-03 20:15:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:15:08,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:08,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:08,477 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:08,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-03 20:15:08,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:15:08,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:15:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:08,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:15:08,945 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 20:15:08,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:09,242 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:15:09,243 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 20:15:09,828 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 20:15:09,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117524517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:09,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:09,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-03 20:15:09,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422644968] [2022-03-03 20:15:09,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:09,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:15:09,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:15:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:15:09,831 INFO L87 Difference]: Start difference. First operand 4364 states and 15923 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:11,691 INFO L93 Difference]: Finished difference Result 5741 states and 20337 transitions. [2022-03-03 20:15:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 20:15:11,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:11,703 INFO L225 Difference]: With dead ends: 5741 [2022-03-03 20:15:11,703 INFO L226 Difference]: Without dead ends: 5665 [2022-03-03 20:15:11,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:15:11,704 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:11,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 290 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:15:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-03-03 20:15:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 4378. [2022-03-03 20:15:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 3.6440484350011424) internal successors, (15950), 4377 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 15950 transitions. [2022-03-03 20:15:11,780 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 15950 transitions. Word has length 26 [2022-03-03 20:15:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:11,780 INFO L470 AbstractCegarLoop]: Abstraction has 4378 states and 15950 transitions. [2022-03-03 20:15:11,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 15950 transitions. [2022-03-03 20:15:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:11,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:11,787 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 20:15:11,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:12,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:12,003 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 51 times [2022-03-03 20:15:12,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:12,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114193124] [2022-03-03 20:15:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:12,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:12,290 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 20:15:12,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:12,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114193124] [2022-03-03 20:15:12,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114193124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:12,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075038808] [2022-03-03 20:15:12,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:15:12,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:12,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:12,291 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:12,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-03 20:15:12,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:15:12,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:15:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:12,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-03 20:15:12,627 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 20:15:12,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:12,892 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:15:12,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:15:13,237 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 20:15:13,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075038808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:13,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:13,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:15:13,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934977189] [2022-03-03 20:15:13,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:13,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:15:13,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:15:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:15:13,238 INFO L87 Difference]: Start difference. First operand 4378 states and 15950 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:14,432 INFO L93 Difference]: Finished difference Result 5750 states and 20379 transitions. [2022-03-03 20:15:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:15:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:14,444 INFO L225 Difference]: With dead ends: 5750 [2022-03-03 20:15:14,445 INFO L226 Difference]: Without dead ends: 5720 [2022-03-03 20:15:14,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:15:14,445 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:14,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 327 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:15:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2022-03-03 20:15:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 4396. [2022-03-03 20:15:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4396 states, 4395 states have (on average 3.6439135381114904) internal successors, (16015), 4395 states have internal predecessors, (16015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4396 states to 4396 states and 16015 transitions. [2022-03-03 20:15:14,517 INFO L78 Accepts]: Start accepts. Automaton has 4396 states and 16015 transitions. Word has length 26 [2022-03-03 20:15:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:14,518 INFO L470 AbstractCegarLoop]: Abstraction has 4396 states and 16015 transitions. [2022-03-03 20:15:14,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4396 states and 16015 transitions. [2022-03-03 20:15:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:14,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:14,525 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 20:15:14,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-03 20:15:14,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-03 20:15:14,730 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:14,730 INFO L85 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 55 times [2022-03-03 20:15:14,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:14,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623636020] [2022-03-03 20:15:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:14,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:15,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:15,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623636020] [2022-03-03 20:15:15,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623636020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:15,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046673612] [2022-03-03 20:15:15,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:15:15,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:15,054 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:15,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-03 20:15:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:15:15,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:15,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:15,610 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 20:15:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:15,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:16,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:16,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:16,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:15:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:18,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046673612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:18,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:18,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:15:18,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622815718] [2022-03-03 20:15:18,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:18,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:15:18,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:15:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:15:18,277 INFO L87 Difference]: Start difference. First operand 4396 states and 16015 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:23,052 INFO L93 Difference]: Finished difference Result 8554 states and 28432 transitions. [2022-03-03 20:15:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:15:23,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:23,071 INFO L225 Difference]: With dead ends: 8554 [2022-03-03 20:15:23,071 INFO L226 Difference]: Without dead ends: 8524 [2022-03-03 20:15:23,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1138, Invalid=3974, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:15:23,072 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 538 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:23,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 404 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1356 Invalid, 0 Unknown, 198 Unchecked, 0.9s Time] [2022-03-03 20:15:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8524 states. [2022-03-03 20:15:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8524 to 4520. [2022-03-03 20:15:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 3.643062624474441) internal successors, (16463), 4519 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 16463 transitions. [2022-03-03 20:15:23,205 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 16463 transitions. Word has length 26 [2022-03-03 20:15:23,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:23,205 INFO L470 AbstractCegarLoop]: Abstraction has 4520 states and 16463 transitions. [2022-03-03 20:15:23,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 16463 transitions. [2022-03-03 20:15:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:23,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:23,227 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 20:15:23,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-03 20:15:23,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:23,441 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:23,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 849972876, now seen corresponding path program 52 times [2022-03-03 20:15:23,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:23,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188205220] [2022-03-03 20:15:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:23,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:23,580 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 20:15:23,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:23,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188205220] [2022-03-03 20:15:23,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188205220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:23,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049663392] [2022-03-03 20:15:23,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:15:23,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:23,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:23,582 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:23,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-03 20:15:23,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:15:23,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:23,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:15:23,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:24,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:24,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:24,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:24,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:24,235 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 20:15:24,298 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 20:15:24,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:24,549 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:15:24,549 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 20:15:24,992 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 20:15:24,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049663392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:24,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:24,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-03 20:15:25,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455552530] [2022-03-03 20:15:25,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:25,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:15:25,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:15:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:15:25,001 INFO L87 Difference]: Start difference. First operand 4520 states and 16463 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:30,425 INFO L93 Difference]: Finished difference Result 7276 states and 24606 transitions. [2022-03-03 20:15:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 20:15:30,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:30,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:30,439 INFO L225 Difference]: With dead ends: 7276 [2022-03-03 20:15:30,439 INFO L226 Difference]: Without dead ends: 7246 [2022-03-03 20:15:30,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3867 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1746, Invalid=8966, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 20:15:30,441 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 400 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:30,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 506 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:15:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2022-03-03 20:15:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 4596. [2022-03-03 20:15:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4596 states, 4595 states have (on average 3.647442872687704) internal successors, (16760), 4595 states have internal predecessors, (16760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4596 states to 4596 states and 16760 transitions. [2022-03-03 20:15:30,532 INFO L78 Accepts]: Start accepts. Automaton has 4596 states and 16760 transitions. Word has length 26 [2022-03-03 20:15:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:30,532 INFO L470 AbstractCegarLoop]: Abstraction has 4596 states and 16760 transitions. [2022-03-03 20:15:30,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4596 states and 16760 transitions. [2022-03-03 20:15:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:30,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:30,539 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 20:15:30,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:30,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:30,755 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 889461688, now seen corresponding path program 56 times [2022-03-03 20:15:30,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:30,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786287189] [2022-03-03 20:15:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:31,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:31,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786287189] [2022-03-03 20:15:31,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786287189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:31,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575493219] [2022-03-03 20:15:31,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:15:31,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:31,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:31,034 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:31,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-03 20:15:31,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:15:31,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:15:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:31,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:31,720 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 20:15:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:32,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:32,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:32,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:32,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:32,917 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 20:15:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:33,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575493219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:33,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:33,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:15:33,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962294859] [2022-03-03 20:15:33,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:33,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:15:33,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:33,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:15:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:15:33,515 INFO L87 Difference]: Start difference. First operand 4596 states and 16760 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 20:15:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:42,689 INFO L93 Difference]: Finished difference Result 11593 states and 39208 transitions. [2022-03-03 20:15:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-03 20:15:42,689 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 20:15:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:42,715 INFO L225 Difference]: With dead ends: 11593 [2022-03-03 20:15:42,715 INFO L226 Difference]: Without dead ends: 11548 [2022-03-03 20:15:42,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6345 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2011, Invalid=15019, Unknown=0, NotChecked=0, Total=17030 [2022-03-03 20:15:42,717 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 506 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 722 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:42,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 979 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1968 Invalid, 0 Unknown, 722 Unchecked, 1.1s Time] [2022-03-03 20:15:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11548 states. [2022-03-03 20:15:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11548 to 4613. [2022-03-03 20:15:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 3.6513443191673893) internal successors, (16840), 4612 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 16840 transitions. [2022-03-03 20:15:42,913 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 16840 transitions. Word has length 26 [2022-03-03 20:15:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:42,913 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 16840 transitions. [2022-03-03 20:15:42,913 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 20:15:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 16840 transitions. [2022-03-03 20:15:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:42,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:42,920 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 20:15:42,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-03 20:15:43,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:43,135 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash -604446034, now seen corresponding path program 57 times [2022-03-03 20:15:43,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:43,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333654485] [2022-03-03 20:15:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:43,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:43,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333654485] [2022-03-03 20:15:43,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333654485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:43,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063080921] [2022-03-03 20:15:43,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:15:43,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:43,439 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:43,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-03 20:15:43,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:15:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:43,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:15:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:44,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:44,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:44,101 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 20:15:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:44,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:44,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:44,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:44,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:15:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:47,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063080921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:47,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:47,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:15:47,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660409692] [2022-03-03 20:15:47,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:47,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:15:47,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:15:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:15:47,643 INFO L87 Difference]: Start difference. First operand 4613 states and 16840 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 20:15:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:50,080 INFO L93 Difference]: Finished difference Result 8544 states and 28609 transitions. [2022-03-03 20:15:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:15:50,080 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 20:15:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:50,099 INFO L225 Difference]: With dead ends: 8544 [2022-03-03 20:15:50,099 INFO L226 Difference]: Without dead ends: 8514 [2022-03-03 20:15:50,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=711, Invalid=2711, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 20:15:50,100 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 392 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:50,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 357 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1112 Invalid, 0 Unknown, 248 Unchecked, 0.6s Time] [2022-03-03 20:15:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8514 states. [2022-03-03 20:15:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8514 to 4586. [2022-03-03 20:15:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 3.6523446019629224) internal successors, (16746), 4585 states have internal predecessors, (16746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 16746 transitions. [2022-03-03 20:15:50,225 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 16746 transitions. Word has length 26 [2022-03-03 20:15:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:50,225 INFO L470 AbstractCegarLoop]: Abstraction has 4586 states and 16746 transitions. [2022-03-03 20:15:50,225 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 20:15:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 16746 transitions. [2022-03-03 20:15:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:50,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:50,233 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 20:15:50,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-03 20:15:50,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-03 20:15:50,449 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash -161119012, now seen corresponding path program 58 times [2022-03-03 20:15:50,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:50,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69153567] [2022-03-03 20:15:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:50,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:50,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69153567] [2022-03-03 20:15:50,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69153567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:50,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784283689] [2022-03-03 20:15:50,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:15:50,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:50,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:50,687 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:50,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-03 20:15:50,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:15:50,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:15:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:51,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:51,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:51,127 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 20:15:51,475 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 20:15:51,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:51,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:51,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:51,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:15:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:54,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784283689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:54,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:54,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:15:54,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384943732] [2022-03-03 20:15:54,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:54,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:15:54,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:54,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:15:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:15:54,102 INFO L87 Difference]: Start difference. First operand 4586 states and 16746 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 20:15:59,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:59,779 INFO L93 Difference]: Finished difference Result 8762 states and 29387 transitions. [2022-03-03 20:15:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:15:59,780 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 20:15:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:59,799 INFO L225 Difference]: With dead ends: 8762 [2022-03-03 20:15:59,799 INFO L226 Difference]: Without dead ends: 8732 [2022-03-03 20:15:59,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1195, Invalid=4355, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:15:59,800 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 441 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:59,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 617 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1887 Invalid, 0 Unknown, 287 Unchecked, 1.2s Time] [2022-03-03 20:15:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8732 states. [2022-03-03 20:15:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8732 to 4602. [2022-03-03 20:15:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 3.649858726363834) internal successors, (16793), 4601 states have internal predecessors, (16793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 16793 transitions. [2022-03-03 20:15:59,913 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 16793 transitions. Word has length 26 [2022-03-03 20:15:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:59,914 INFO L470 AbstractCegarLoop]: Abstraction has 4602 states and 16793 transitions. [2022-03-03 20:15:59,914 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 20:15:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 16793 transitions. [2022-03-03 20:15:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:59,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:59,921 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 20:15:59,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:00,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-03 20:16:00,137 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:00,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1075966400, now seen corresponding path program 53 times [2022-03-03 20:16:00,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:00,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120708225] [2022-03-03 20:16:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:00,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:00,294 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 20:16:00,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:00,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120708225] [2022-03-03 20:16:00,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120708225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:00,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382267783] [2022-03-03 20:16:00,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:16:00,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:00,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:00,295 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:00,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-03 20:16:00,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:16:00,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:00,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:16:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:00,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:00,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:00,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:00,849 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 20:16:00,946 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 20:16:00,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:01,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:01,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:01,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:01,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:01,207 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 20:16:01,428 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 20:16:01,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382267783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:01,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:01,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 20:16:01,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384766115] [2022-03-03 20:16:01,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:01,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:16:01,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:16:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:16:01,429 INFO L87 Difference]: Start difference. First operand 4602 states and 16793 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:03,115 INFO L93 Difference]: Finished difference Result 7010 states and 24117 transitions. [2022-03-03 20:16:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 20:16:03,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 20:16:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:03,131 INFO L225 Difference]: With dead ends: 7010 [2022-03-03 20:16:03,131 INFO L226 Difference]: Without dead ends: 6966 [2022-03-03 20:16:03,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=430, Invalid=1922, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:16:03,131 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 285 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:03,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 335 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:16:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6966 states. [2022-03-03 20:16:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6966 to 4694. [2022-03-03 20:16:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4693 states have (on average 3.645642446196463) internal successors, (17109), 4693 states have internal predecessors, (17109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 17109 transitions. [2022-03-03 20:16:03,253 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 17109 transitions. Word has length 26 [2022-03-03 20:16:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:03,254 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 17109 transitions. [2022-03-03 20:16:03,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 17109 transitions. [2022-03-03 20:16:03,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:03,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:03,262 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 20:16:03,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:03,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-03 20:16:03,476 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:03,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1385352244, now seen corresponding path program 54 times [2022-03-03 20:16:03,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:03,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265173512] [2022-03-03 20:16:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:03,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:03,612 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 20:16:03,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:03,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265173512] [2022-03-03 20:16:03,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265173512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:03,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240955508] [2022-03-03 20:16:03,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:16:03,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:03,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:03,613 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:03,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-03 20:16:03,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:16:03,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:16:03,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:04,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:04,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:04,030 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 20:16:04,602 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 20:16:04,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:04,951 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:16:04,951 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 20:16:05,625 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 20:16:05,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240955508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:05,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:05,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-03 20:16:05,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111275694] [2022-03-03 20:16:05,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:05,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:16:05,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:05,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:16:05,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:16:05,626 INFO L87 Difference]: Start difference. First operand 4694 states and 17109 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 20:16:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:14,882 INFO L93 Difference]: Finished difference Result 9428 states and 31738 transitions. [2022-03-03 20:16:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-03 20:16:14,882 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 20:16:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:14,902 INFO L225 Difference]: With dead ends: 9428 [2022-03-03 20:16:14,903 INFO L226 Difference]: Without dead ends: 9391 [2022-03-03 20:16:14,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6044 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2694, Invalid=13562, Unknown=0, NotChecked=0, Total=16256 [2022-03-03 20:16:14,905 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 503 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:14,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 693 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 20:16:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2022-03-03 20:16:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 4698. [2022-03-03 20:16:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4697 states have (on average 3.6465829252714497) internal successors, (17128), 4697 states have internal predecessors, (17128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 17128 transitions. [2022-03-03 20:16:15,033 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 17128 transitions. Word has length 26 [2022-03-03 20:16:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:15,033 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 17128 transitions. [2022-03-03 20:16:15,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 20:16:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 17128 transitions. [2022-03-03 20:16:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:15,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:15,042 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 20:16:15,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:15,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-03 20:16:15,248 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash 465150452, now seen corresponding path program 59 times [2022-03-03 20:16:15,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:15,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274321575] [2022-03-03 20:16:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:15,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:15,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274321575] [2022-03-03 20:16:15,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274321575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:15,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312171207] [2022-03-03 20:16:15,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:16:15,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:15,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:15,547 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:15,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-03 20:16:15,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:16:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:16:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:16,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:16,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:16,192 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 20:16:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:16,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:16,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:16,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:16,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-03 20:16:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:19,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312171207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:19,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:19,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:16:19,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929315100] [2022-03-03 20:16:19,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:19,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:16:19,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:19,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:16:19,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:16:19,230 INFO L87 Difference]: Start difference. First operand 4698 states and 17128 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 20:16:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:24,310 INFO L93 Difference]: Finished difference Result 9669 states and 33064 transitions. [2022-03-03 20:16:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 20:16:24,310 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 20:16:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:24,330 INFO L225 Difference]: With dead ends: 9669 [2022-03-03 20:16:24,330 INFO L226 Difference]: Without dead ends: 9594 [2022-03-03 20:16:24,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=915, Invalid=5405, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 20:16:24,331 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 368 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:24,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 409 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1066 Invalid, 0 Unknown, 506 Unchecked, 0.6s Time] [2022-03-03 20:16:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9594 states. [2022-03-03 20:16:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9594 to 4721. [2022-03-03 20:16:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4720 states have (on average 3.648728813559322) internal successors, (17222), 4720 states have internal predecessors, (17222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 17222 transitions. [2022-03-03 20:16:24,455 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 17222 transitions. Word has length 26 [2022-03-03 20:16:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:24,455 INFO L470 AbstractCegarLoop]: Abstraction has 4721 states and 17222 transitions. [2022-03-03 20:16:24,456 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 20:16:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 17222 transitions. [2022-03-03 20:16:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:24,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:24,463 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 20:16:24,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-03 20:16:24,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:24,669 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:24,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1152382328, now seen corresponding path program 60 times [2022-03-03 20:16:24,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:24,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750046839] [2022-03-03 20:16:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:24,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750046839] [2022-03-03 20:16:24,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750046839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430990569] [2022-03-03 20:16:24,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:16:24,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:24,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:24,944 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:24,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-03 20:16:24,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:16:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:16:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:25,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:25,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:25,224 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 20:16:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:25,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:25,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:25,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:25,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-03-03 20:16:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:28,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430990569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:28,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:28,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:16:28,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672973993] [2022-03-03 20:16:28,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:28,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:16:28,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:16:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:16:28,679 INFO L87 Difference]: Start difference. First operand 4721 states and 17222 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 20:16:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:32,590 INFO L93 Difference]: Finished difference Result 8171 states and 27748 transitions. [2022-03-03 20:16:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:16:32,591 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 20:16:32,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:32,606 INFO L225 Difference]: With dead ends: 8171 [2022-03-03 20:16:32,606 INFO L226 Difference]: Without dead ends: 8135 [2022-03-03 20:16:32,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=823, Invalid=3599, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 20:16:32,607 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 335 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:32,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 463 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1450 Invalid, 0 Unknown, 242 Unchecked, 0.9s Time] [2022-03-03 20:16:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8135 states. [2022-03-03 20:16:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8135 to 4759. [2022-03-03 20:16:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4759 states, 4758 states have (on average 3.644598570828079) internal successors, (17341), 4758 states have internal predecessors, (17341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 17341 transitions. [2022-03-03 20:16:32,698 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 17341 transitions. Word has length 26 [2022-03-03 20:16:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 4759 states and 17341 transitions. [2022-03-03 20:16:32,698 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 20:16:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 17341 transitions. [2022-03-03 20:16:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:32,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:32,705 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 20:16:32,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:32,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:32,911 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1131645800, now seen corresponding path program 61 times [2022-03-03 20:16:32,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:32,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528253463] [2022-03-03 20:16:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:32,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:33,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:33,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528253463] [2022-03-03 20:16:33,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528253463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:33,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380299083] [2022-03-03 20:16:33,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:16:33,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:33,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:33,210 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:33,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-03 20:16:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:16:33,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:33,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:33,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:33,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:33,706 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 141 treesize of output 99 [2022-03-03 20:16:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:34,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:34,457 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:16:34,457 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 20:16:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:38,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380299083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:38,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:38,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:16:38,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512924974] [2022-03-03 20:16:38,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:16:38,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:16:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:16:38,127 INFO L87 Difference]: Start difference. First operand 4759 states and 17341 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 20:16:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:43,210 INFO L93 Difference]: Finished difference Result 8518 states and 28909 transitions. [2022-03-03 20:16:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 20:16:43,210 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 20:16:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:43,227 INFO L225 Difference]: With dead ends: 8518 [2022-03-03 20:16:43,228 INFO L226 Difference]: Without dead ends: 8488 [2022-03-03 20:16:43,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1010, Invalid=6130, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 20:16:43,228 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 385 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:43,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 512 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:16:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8488 states. [2022-03-03 20:16:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8488 to 4746. [2022-03-03 20:16:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.644678609062171) internal successors, (17294), 4745 states have internal predecessors, (17294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 17294 transitions. [2022-03-03 20:16:43,322 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 17294 transitions. Word has length 26 [2022-03-03 20:16:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:43,322 INFO L470 AbstractCegarLoop]: Abstraction has 4746 states and 17294 transitions. [2022-03-03 20:16:43,322 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 20:16:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 17294 transitions. [2022-03-03 20:16:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:43,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:43,329 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 20:16:43,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-03 20:16:43,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-03 20:16:43,543 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 62 times [2022-03-03 20:16:43,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:43,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533083339] [2022-03-03 20:16:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:43,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:43,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533083339] [2022-03-03 20:16:43,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533083339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:43,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011551243] [2022-03-03 20:16:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:16:43,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:43,830 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:43,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-03 20:16:43,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:16:43,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:16:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:44,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:44,309 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 20:16:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:45,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:46,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:46,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:46,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:46,539 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 20:16:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:47,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011551243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:47,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:47,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:16:47,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128385283] [2022-03-03 20:16:47,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:47,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:16:47,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:16:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:16:47,531 INFO L87 Difference]: Start difference. First operand 4746 states and 17294 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 20:16:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:56,712 INFO L93 Difference]: Finished difference Result 11434 states and 39654 transitions. [2022-03-03 20:16:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-03 20:16:56,713 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 20:16:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:56,736 INFO L225 Difference]: With dead ends: 11434 [2022-03-03 20:16:56,737 INFO L226 Difference]: Without dead ends: 11390 [2022-03-03 20:16:56,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5264 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1967, Invalid=12795, Unknown=0, NotChecked=0, Total=14762 [2022-03-03 20:16:56,738 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 503 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1609 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:56,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 655 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1342 Invalid, 0 Unknown, 1609 Unchecked, 0.8s Time] [2022-03-03 20:16:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11390 states. [2022-03-03 20:16:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11390 to 4801. [2022-03-03 20:16:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 4800 states have (on average 3.655625) internal successors, (17547), 4800 states have internal predecessors, (17547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 17547 transitions. [2022-03-03 20:16:56,897 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 17547 transitions. Word has length 26 [2022-03-03 20:16:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:56,897 INFO L470 AbstractCegarLoop]: Abstraction has 4801 states and 17547 transitions. [2022-03-03 20:16:56,898 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 20:16:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 17547 transitions. [2022-03-03 20:16:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:56,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:56,905 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 20:16:56,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:57,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:57,107 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash 769349170, now seen corresponding path program 63 times [2022-03-03 20:16:57,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:57,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521246955] [2022-03-03 20:16:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:57,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:57,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:57,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521246955] [2022-03-03 20:16:57,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521246955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:57,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352720975] [2022-03-03 20:16:57,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:16:57,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:57,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:57,350 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:57,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:16:57,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:57,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-03 20:16:57,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:16:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:57,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:57,814 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 20:16:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:58,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:59,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:59,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:17:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:03,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352720975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:03,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:03,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-03-03 20:17:03,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688453047] [2022-03-03 20:17:03,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:03,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:17:03,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:17:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:17:03,525 INFO L87 Difference]: Start difference. First operand 4801 states and 17547 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 20:17:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:07,267 INFO L93 Difference]: Finished difference Result 8206 states and 28770 transitions. [2022-03-03 20:17:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:17:07,268 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 20:17:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:07,284 INFO L225 Difference]: With dead ends: 8206 [2022-03-03 20:17:07,285 INFO L226 Difference]: Without dead ends: 8156 [2022-03-03 20:17:07,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:17:07,285 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 294 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1532 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:07,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 463 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 747 Invalid, 0 Unknown, 1532 Unchecked, 0.4s Time] [2022-03-03 20:17:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2022-03-03 20:17:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 4799. [2022-03-03 20:17:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.6552730304293455) internal successors, (17538), 4798 states have internal predecessors, (17538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 17538 transitions. [2022-03-03 20:17:07,394 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 17538 transitions. Word has length 26 [2022-03-03 20:17:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:07,394 INFO L470 AbstractCegarLoop]: Abstraction has 4799 states and 17538 transitions. [2022-03-03 20:17:07,394 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 20:17:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 17538 transitions. [2022-03-03 20:17:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:07,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:07,403 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 20:17:07,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:07,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:07,619 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:07,619 INFO L85 PathProgramCache]: Analyzing trace with hash -332212152, now seen corresponding path program 64 times [2022-03-03 20:17:07,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:07,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254616337] [2022-03-03 20:17:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:07,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:07,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:07,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254616337] [2022-03-03 20:17:07,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254616337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:07,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580720913] [2022-03-03 20:17:07,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:17:07,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:07,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:07,857 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:07,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-03 20:17:07,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:17:07,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:17:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:08,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:08,334 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 110 treesize of output 76 [2022-03-03 20:17:08,420 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 20:17:08,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:08,801 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:17:08,801 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 263 treesize of output 193 [2022-03-03 20:17:12,099 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 20:17:12,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580720913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:12,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:12,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 20:17:12,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645101054] [2022-03-03 20:17:12,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:12,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:17:12,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:17:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:17:12,100 INFO L87 Difference]: Start difference. First operand 4799 states and 17538 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 20:17:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:14,853 INFO L93 Difference]: Finished difference Result 7128 states and 24464 transitions. [2022-03-03 20:17:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:17:14,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 26 [2022-03-03 20:17:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:14,870 INFO L225 Difference]: With dead ends: 7128 [2022-03-03 20:17:14,870 INFO L226 Difference]: Without dead ends: 7098 [2022-03-03 20:17:14,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:17:14,870 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 210 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:14,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 409 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 932 Invalid, 0 Unknown, 59 Unchecked, 0.6s Time] [2022-03-03 20:17:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7098 states. [2022-03-03 20:17:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7098 to 4819. [2022-03-03 20:17:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4818 states have (on average 3.654005811540058) internal successors, (17605), 4818 states have internal predecessors, (17605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 17605 transitions. [2022-03-03 20:17:14,975 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 17605 transitions. Word has length 26 [2022-03-03 20:17:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:14,975 INFO L470 AbstractCegarLoop]: Abstraction has 4819 states and 17605 transitions. [2022-03-03 20:17:14,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 20:17:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 17605 transitions. [2022-03-03 20:17:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:14,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:14,983 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 20:17:14,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:15,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:15,189 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1366685828, now seen corresponding path program 65 times [2022-03-03 20:17:15,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:15,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172410310] [2022-03-03 20:17:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:15,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:15,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172410310] [2022-03-03 20:17:15,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172410310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:15,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397073905] [2022-03-03 20:17:15,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:17:15,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:15,460 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:15,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-03 20:17:15,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:17:15,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:17:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:16,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:16,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:16,102 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 20:17:16,518 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 20:17:16,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:17,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:17,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:17,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:17,055 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 231 treesize of output 173 [2022-03-03 20:17:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:18,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397073905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:18,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:18,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:17:18,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195306835] [2022-03-03 20:17:18,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:18,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:17:18,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:18,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:17:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:17:18,170 INFO L87 Difference]: Start difference. First operand 4819 states and 17605 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 20:17:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:21,972 INFO L93 Difference]: Finished difference Result 8653 states and 30292 transitions. [2022-03-03 20:17:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:17:21,972 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 20:17:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:21,992 INFO L225 Difference]: With dead ends: 8653 [2022-03-03 20:17:21,992 INFO L226 Difference]: Without dead ends: 8632 [2022-03-03 20:17:21,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=586, Invalid=3446, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 20:17:21,993 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 344 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 984 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:21,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 493 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 596 Invalid, 0 Unknown, 984 Unchecked, 0.5s Time] [2022-03-03 20:17:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2022-03-03 20:17:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 4820. [2022-03-03 20:17:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4820 states, 4819 states have (on average 3.65428512139448) internal successors, (17610), 4819 states have internal predecessors, (17610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4820 states to 4820 states and 17610 transitions. [2022-03-03 20:17:22,135 INFO L78 Accepts]: Start accepts. Automaton has 4820 states and 17610 transitions. Word has length 26 [2022-03-03 20:17:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:22,135 INFO L470 AbstractCegarLoop]: Abstraction has 4820 states and 17610 transitions. [2022-03-03 20:17:22,135 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 20:17:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4820 states and 17610 transitions. [2022-03-03 20:17:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:22,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:22,145 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 20:17:22,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:22,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:22,361 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:22,361 INFO L85 PathProgramCache]: Analyzing trace with hash 99228650, now seen corresponding path program 66 times [2022-03-03 20:17:22,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:22,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532762556] [2022-03-03 20:17:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:22,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:22,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:22,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532762556] [2022-03-03 20:17:22,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532762556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:22,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621885860] [2022-03-03 20:17:22,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:17:22,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:22,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:22,648 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:22,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-03 20:17:22,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:17:22,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:17:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:23,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:23,065 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 20:17:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:23,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:23,923 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:17:23,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-03-03 20:17:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:25,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621885860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:25,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:25,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:17:25,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858818635] [2022-03-03 20:17:25,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:25,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:17:25,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:25,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:17:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:17:25,954 INFO L87 Difference]: Start difference. First operand 4820 states and 17610 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 20:17:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:33,119 INFO L93 Difference]: Finished difference Result 8880 states and 30014 transitions. [2022-03-03 20:17:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 20:17:33,119 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 20:17:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:33,139 INFO L225 Difference]: With dead ends: 8880 [2022-03-03 20:17:33,139 INFO L226 Difference]: Without dead ends: 8830 [2022-03-03 20:17:33,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1121, Invalid=6711, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 20:17:33,140 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 362 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:33,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 528 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 20:17:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8830 states. [2022-03-03 20:17:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8830 to 4782. [2022-03-03 20:17:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4782 states, 4781 states have (on average 3.6540472704455134) internal successors, (17470), 4781 states have internal predecessors, (17470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4782 states to 4782 states and 17470 transitions. [2022-03-03 20:17:33,256 INFO L78 Accepts]: Start accepts. Automaton has 4782 states and 17470 transitions. Word has length 26 [2022-03-03 20:17:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:33,256 INFO L470 AbstractCegarLoop]: Abstraction has 4782 states and 17470 transitions. [2022-03-03 20:17:33,256 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 20:17:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4782 states and 17470 transitions. [2022-03-03 20:17:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:33,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:33,264 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 20:17:33,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:33,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-03 20:17:33,480 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 55 times [2022-03-03 20:17:33,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:33,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679888935] [2022-03-03 20:17:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:33,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:33,713 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 20:17:33,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:33,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679888935] [2022-03-03 20:17:33,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679888935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:33,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143865035] [2022-03-03 20:17:33,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:17:33,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:33,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:33,714 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:33,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-03 20:17:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:17:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:34,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:34,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:34,323 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 20:17:34,437 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 20:17:34,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:34,882 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:17:34,882 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 20:17:35,650 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 20:17:35,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143865035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:35,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:35,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:17:35,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627736269] [2022-03-03 20:17:35,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:17:35,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:17:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:17:35,652 INFO L87 Difference]: Start difference. First operand 4782 states and 17470 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 20:17:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:41,861 INFO L93 Difference]: Finished difference Result 7346 states and 25456 transitions. [2022-03-03 20:17:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 20:17:41,861 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 20:17:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:41,875 INFO L225 Difference]: With dead ends: 7346 [2022-03-03 20:17:41,875 INFO L226 Difference]: Without dead ends: 7288 [2022-03-03 20:17:41,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3024 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1468, Invalid=7274, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 20:17:41,876 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 272 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:41,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 644 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:17:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7288 states. [2022-03-03 20:17:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7288 to 4857. [2022-03-03 20:17:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4857 states, 4856 states have (on average 3.642504118616145) internal successors, (17688), 4856 states have internal predecessors, (17688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4857 states to 4857 states and 17688 transitions. [2022-03-03 20:17:41,973 INFO L78 Accepts]: Start accepts. Automaton has 4857 states and 17688 transitions. Word has length 26 [2022-03-03 20:17:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:41,973 INFO L470 AbstractCegarLoop]: Abstraction has 4857 states and 17688 transitions. [2022-03-03 20:17:41,973 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 20:17:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4857 states and 17688 transitions. [2022-03-03 20:17:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:41,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:41,981 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 20:17:41,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-03 20:17:42,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-03 20:17:42,191 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:42,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash -231497226, now seen corresponding path program 56 times [2022-03-03 20:17:42,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:42,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254171248] [2022-03-03 20:17:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:42,396 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 20:17:42,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:42,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254171248] [2022-03-03 20:17:42,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254171248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:42,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488917218] [2022-03-03 20:17:42,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:17:42,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:42,398 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:42,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-03 20:17:42,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:17:42,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:42,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:17:42,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:42,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:42,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:42,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:42,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20:17:43,079 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 20:17:43,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:43,491 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:17:43,492 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 20:17:44,401 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 20:17:44,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488917218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:44,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:44,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:17:44,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321927674] [2022-03-03 20:17:44,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:44,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:17:44,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:17:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:17:44,402 INFO L87 Difference]: Start difference. First operand 4857 states and 17688 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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) Received shutdown request... [2022-03-03 20:17:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 20:17:50,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2671 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1469, Invalid=6721, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 20:17:50,327 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 272 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:50,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 205 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1331 Invalid, 0 Unknown, 28 Unchecked, 0.8s Time] [2022-03-03 20:17:50,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 20:17:50,328 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:17:50,337 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 20:17:50,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-03 20:17:50,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:50,528 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (4857states) and FLOYD_HOARE automaton (currently 70 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 91 known predicates. [2022-03-03 20:17:50,530 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 20:17:50,530 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 20:17:50,530 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 20:17:50,532 INFO L732 BasicCegarLoop]: Path program histogram: [66, 56, 1, 1, 1] [2022-03-03 20:17:50,534 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:17:50,534 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:17:50,535 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:17:50 BasicIcfg [2022-03-03 20:17:50,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:17:50,535 INFO L158 Benchmark]: Toolchain (without parser) took 867068.42ms. Allocated memory was 180.4MB in the beginning and 652.2MB in the end (delta: 471.9MB). Free memory was 144.7MB in the beginning and 473.0MB in the end (delta: -328.4MB). Peak memory consumption was 144.1MB. Max. memory is 8.0GB. [2022-03-03 20:17:50,535 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 180.4MB. Free memory is still 145.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:17:50,535 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.51ms. Allocated memory is still 180.4MB. Free memory was 144.6MB in the beginning and 143.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-03 20:17:50,535 INFO L158 Benchmark]: Boogie Preprocessor took 11.35ms. Allocated memory is still 180.4MB. Free memory was 143.1MB in the beginning and 142.2MB in the end (delta: 948.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:17:50,535 INFO L158 Benchmark]: RCFGBuilder took 229.00ms. Allocated memory is still 180.4MB. Free memory was 142.1MB in the beginning and 132.6MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 20:17:50,535 INFO L158 Benchmark]: TraceAbstraction took 866803.26ms. Allocated memory was 180.4MB in the beginning and 652.2MB in the end (delta: 471.9MB). Free memory was 132.1MB in the beginning and 473.0MB in the end (delta: -341.0MB). Peak memory consumption was 131.5MB. Max. memory is 8.0GB. [2022-03-03 20:17:50,535 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 0.11ms. Allocated memory is still 180.4MB. Free memory is still 145.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.51ms. Allocated memory is still 180.4MB. Free memory was 144.6MB in the beginning and 143.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.35ms. Allocated memory is still 180.4MB. Free memory was 143.1MB in the beginning and 142.2MB in the end (delta: 948.3kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 229.00ms. Allocated memory is still 180.4MB. Free memory was 142.1MB in the beginning and 132.6MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 866803.26ms. Allocated memory was 180.4MB in the beginning and 652.2MB in the end (delta: 471.9MB). Free memory was 132.1MB in the beginning and 473.0MB in the end (delta: -341.0MB). Peak memory consumption was 131.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (4857states) and FLOYD_HOARE automaton (currently 70 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 91 known predicates. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4857states) and FLOYD_HOARE automaton (currently 70 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 91 known predicates. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4857states) and FLOYD_HOARE automaton (currently 70 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 91 known predicates. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4857states) and FLOYD_HOARE automaton (currently 70 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 91 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 866.7s, OverallIterations: 125, TraceHistogramMax: 2, PathProgramHistogramMax: 66, EmptinessCheckTime: 0.6s, AutomataDifference: 534.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47628 SdHoareTripleChecker+Valid, 83.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47628 mSDsluCounter, 46411 SdHoareTripleChecker+Invalid, 71.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 31499 IncrementalHoareTripleChecker+Unchecked, 78443 mSDsCounter, 9328 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 152812 IncrementalHoareTripleChecker+Invalid, 193639 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9328 mSolverCounterUnsat, 3994 mSDtfsCounter, 152812 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13880 GetRequests, 4573 SyntacticMatches, 337 SemanticMatches, 8969 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 353911 ImplicationChecksByTransitivity, 484.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4857occurred in iteration=124, InterpolantAutomatonStates: 7322, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.7s AutomataMinimizationTime, 124 MinimizatonAttempts, 323951 StatesRemovedByMinimization, 124 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 291.7s InterpolantComputationTime, 6234 NumberOfCodeBlocks, 6228 NumberOfCodeBlocksAsserted, 399 NumberOfCheckSat, 8953 ConstructedInterpolants, 174 QuantifiedInterpolants, 210719 SizeOfPredicates, 1407 NumberOfNonLiveVariables, 7823 ConjunctsInSsa, 2494 ConjunctsInUnsatCore, 369 InterpolantComputations, 3 PerfectInterpolantSequences, 174/2156 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