/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/three-array-min.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 01:03:39,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:03:39,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:03:39,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 01:03:39,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 01:03:39,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 01:03:39,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 01:03:39,226 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 [2022-02-11 01:03:39,238 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:03:39,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:03:39,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:03:39,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:03:39,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:03:39,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:03:39,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:03:39,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:03:39,240 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:03:39,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:03:39,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:03:39,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:03:39,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:03:39,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:03:39,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:03:39,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:03:39,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:03:39,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:03:39,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:03:39,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:03:39,447 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:03:39,454 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:03:39,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-min.wvr.bpl [2022-02-11 01:03:39,456 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-min.wvr.bpl' [2022-02-11 01:03:39,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:03:39,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:03:39,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:03:39,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:03:39,478 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:03:39,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,497 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:03:39,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:03:39,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:03:39,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:03:39,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:03:39,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:03:39,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:03:39,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:03:39,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:03:39,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/1) ... [2022-02-11 01:03:39,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:03:39,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:39,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-11 01:03:39,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-11 01:03:39,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:03:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:03:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:03:39,578 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:03:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:03:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:03:39,578 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:03:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:03:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:03:39,578 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 01:03:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 01:03:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 01:03:39,579 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 01:03:39,620 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:03:39,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:03:39,730 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:03:39,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:03:39,742 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:03:39,743 INFO L202 PluginConnector]: Adding new model three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:03:39 BoogieIcfgContainer [2022-02-11 01:03:39,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:03:39,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:03:39,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:03:39,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:03:39,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:03:39" (1/2) ... [2022-02-11 01:03:39,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739c558b and model type three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:03:39, skipping insertion in model container [2022-02-11 01:03:39,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:03:39" (2/2) ... [2022-02-11 01:03:39,748 INFO L112 eAbstractionObserver]: Analyzing ICFG three-array-min.wvr.bpl [2022-02-11 01:03:39,751 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:03:39,752 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:03:39,752 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:03:39,752 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:03:39,785 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-11 01:03:39,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:03:39,827 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-11 01:03:39,827 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-11 01:03:39,836 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 32 transitions, 88 flow [2022-02-11 01:03:39,869 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:03:39,879 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:39,879 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:39,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1053276962, now seen corresponding path program 1 times [2022-02-11 01:03:39,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:39,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437882075] [2022-02-11 01:03:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:40,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:40,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437882075] [2022-02-11 01:03:40,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437882075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:03:40,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:03:40,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 01:03:40,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010743864] [2022-02-11 01:03:40,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:03:40,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:03:40,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:03:40,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:03:40,098 INFO L87 Difference]: Start difference. First operand has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:40,204 INFO L93 Difference]: Finished difference Result 474 states and 1450 transitions. [2022-02-11 01:03:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:03:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:03:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:40,216 INFO L225 Difference]: With dead ends: 474 [2022-02-11 01:03:40,216 INFO L226 Difference]: Without dead ends: 388 [2022-02-11 01:03:40,217 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:03:40,219 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:40,220 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 58 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-11 01:03:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 176. [2022-02-11 01:03:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0914285714285716) internal successors, (541), 175 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 541 transitions. [2022-02-11 01:03:40,288 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 541 transitions. Word has length 19 [2022-02-11 01:03:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:40,289 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 541 transitions. [2022-02-11 01:03:40,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 541 transitions. [2022-02-11 01:03:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:03:40,291 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:40,291 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:40,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:03:40,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash -324392928, now seen corresponding path program 1 times [2022-02-11 01:03:40,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:40,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371063164] [2022-02-11 01:03:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:40,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:40,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:40,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371063164] [2022-02-11 01:03:40,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371063164] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:03:40,333 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:03:40,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:03:40,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292088128] [2022-02-11 01:03:40,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:03:40,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:03:40,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:03:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:03:40,335 INFO L87 Difference]: Start difference. First operand 176 states and 541 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:40,419 INFO L93 Difference]: Finished difference Result 272 states and 825 transitions. [2022-02-11 01:03:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:03:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 01:03:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:40,423 INFO L225 Difference]: With dead ends: 272 [2022-02-11 01:03:40,423 INFO L226 Difference]: Without dead ends: 249 [2022-02-11 01:03:40,423 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:03:40,424 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:40,425 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-11 01:03:40,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 232. [2022-02-11 01:03:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.051948051948052) internal successors, (705), 231 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 705 transitions. [2022-02-11 01:03:40,441 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 705 transitions. Word has length 22 [2022-02-11 01:03:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:40,442 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 705 transitions. [2022-02-11 01:03:40,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 705 transitions. [2022-02-11 01:03:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:03:40,444 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:40,444 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:40,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 01:03:40,444 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2144032734, now seen corresponding path program 2 times [2022-02-11 01:03:40,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:40,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589973972] [2022-02-11 01:03:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:40,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:40,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:40,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589973972] [2022-02-11 01:03:40,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589973972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:03:40,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:03:40,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:03:40,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306352264] [2022-02-11 01:03:40,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:03:40,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:03:40,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:40,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:03:40,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:03:40,500 INFO L87 Difference]: Start difference. First operand 232 states and 705 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:40,561 INFO L93 Difference]: Finished difference Result 371 states and 1117 transitions. [2022-02-11 01:03:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:03:40,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 01:03:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:40,564 INFO L225 Difference]: With dead ends: 371 [2022-02-11 01:03:40,564 INFO L226 Difference]: Without dead ends: 348 [2022-02-11 01:03:40,564 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:03:40,570 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:40,571 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:03:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-11 01:03:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 267. [2022-02-11 01:03:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1203007518796992) internal successors, (830), 266 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 830 transitions. [2022-02-11 01:03:40,589 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 830 transitions. Word has length 22 [2022-02-11 01:03:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:40,589 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 830 transitions. [2022-02-11 01:03:40,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,589 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 830 transitions. [2022-02-11 01:03:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:03:40,591 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:40,591 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:40,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 01:03:40,591 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -698997086, now seen corresponding path program 3 times [2022-02-11 01:03:40,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:40,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174509401] [2022-02-11 01:03:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:40,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:40,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:40,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174509401] [2022-02-11 01:03:40,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174509401] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:03:40,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:03:40,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:03:40,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559460477] [2022-02-11 01:03:40,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:03:40,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:03:40,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:40,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:03:40,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:03:40,659 INFO L87 Difference]: Start difference. First operand 267 states and 830 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:40,694 INFO L93 Difference]: Finished difference Result 301 states and 881 transitions. [2022-02-11 01:03:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:03:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 01:03:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:40,696 INFO L225 Difference]: With dead ends: 301 [2022-02-11 01:03:40,697 INFO L226 Difference]: Without dead ends: 279 [2022-02-11 01:03:40,697 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:03:40,704 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:40,705 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:03:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-11 01:03:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2022-02-11 01:03:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.022140221402214) internal successors, (819), 271 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 819 transitions. [2022-02-11 01:03:40,725 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 819 transitions. Word has length 22 [2022-02-11 01:03:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:40,726 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 819 transitions. [2022-02-11 01:03:40,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 819 transitions. [2022-02-11 01:03:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:03:40,728 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:40,728 INFO L515 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] [2022-02-11 01:03:40,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-11 01:03:40,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 665668420, now seen corresponding path program 1 times [2022-02-11 01:03:40,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:40,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719607433] [2022-02-11 01:03:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:40,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:40,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719607433] [2022-02-11 01:03:40,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719607433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:40,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285577926] [2022-02-11 01:03:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:40,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:40,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:40,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 01:03:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-11 01:03:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:40,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:41,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285577926] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:41,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:41,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-11 01:03:41,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859046993] [2022-02-11 01:03:41,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:41,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:03:41,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:41,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:03:41,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:03:41,004 INFO L87 Difference]: Start difference. First operand 272 states and 819 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:41,084 INFO L93 Difference]: Finished difference Result 360 states and 1056 transitions. [2022-02-11 01:03:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:03:41,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:03:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:41,086 INFO L225 Difference]: With dead ends: 360 [2022-02-11 01:03:41,087 INFO L226 Difference]: Without dead ends: 360 [2022-02-11 01:03:41,087 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:03:41,088 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:41,089 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-11 01:03:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 288. [2022-02-11 01:03:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.0034843205574915) internal successors, (862), 287 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 862 transitions. [2022-02-11 01:03:41,097 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 862 transitions. Word has length 24 [2022-02-11 01:03:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:41,097 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 862 transitions. [2022-02-11 01:03:41,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 862 transitions. [2022-02-11 01:03:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:03:41,108 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:41,108 INFO L515 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] [2022-02-11 01:03:41,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:41,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:41,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:41,309 INFO L85 PathProgramCache]: Analyzing trace with hash 55281188, now seen corresponding path program 2 times [2022-02-11 01:03:41,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:41,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396213759] [2022-02-11 01:03:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:41,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:41,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:41,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396213759] [2022-02-11 01:03:41,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396213759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:03:41,360 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:03:41,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:03:41,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809901497] [2022-02-11 01:03:41,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:03:41,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:03:41,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:41,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:03:41,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:03:41,361 INFO L87 Difference]: Start difference. First operand 288 states and 862 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:41,398 INFO L93 Difference]: Finished difference Result 276 states and 851 transitions. [2022-02-11 01:03:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:03:41,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:03:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:41,400 INFO L225 Difference]: With dead ends: 276 [2022-02-11 01:03:41,400 INFO L226 Difference]: Without dead ends: 276 [2022-02-11 01:03:41,400 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:03:41,402 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:41,402 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:03:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-11 01:03:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 243. [2022-02-11 01:03:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 3.0950413223140494) internal successors, (749), 242 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 749 transitions. [2022-02-11 01:03:41,408 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 749 transitions. Word has length 24 [2022-02-11 01:03:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:41,409 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 749 transitions. [2022-02-11 01:03:41,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 749 transitions. [2022-02-11 01:03:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:03:41,409 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:41,410 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:41,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-11 01:03:41,410 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:41,411 INFO L85 PathProgramCache]: Analyzing trace with hash 109515422, now seen corresponding path program 1 times [2022-02-11 01:03:41,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:41,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873236092] [2022-02-11 01:03:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:41,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:41,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:41,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873236092] [2022-02-11 01:03:41,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873236092] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:41,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63603437] [2022-02-11 01:03:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:41,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:41,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 01:03:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 01:03:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:42,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-02-11 01:03:42,353 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 49 treesize of output 33 [2022-02-11 01:03:42,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2022-02-11 01:03:42,483 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 30 treesize of output 22 [2022-02-11 01:03:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:42,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:42,646 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 72 treesize of output 66 [2022-02-11 01:03:43,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:03:43,411 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 94 treesize of output 98 [2022-02-11 01:03:43,575 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-02-11 01:03:43,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 1 [2022-02-11 01:03:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:43,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63603437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:43,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:43,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-11 01:03:43,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102356182] [2022-02-11 01:03:43,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:43,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:03:43,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:03:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:03:43,643 INFO L87 Difference]: Start difference. First operand 243 states and 749 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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) [2022-02-11 01:03:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:43,982 INFO L93 Difference]: Finished difference Result 471 states and 1460 transitions. [2022-02-11 01:03:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:03:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 [2022-02-11 01:03:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:43,985 INFO L225 Difference]: With dead ends: 471 [2022-02-11 01:03:43,985 INFO L226 Difference]: Without dead ends: 428 [2022-02-11 01:03:43,986 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:03:43,986 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:43,986 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 113 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:03:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-11 01:03:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 329. [2022-02-11 01:03:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.1219512195121952) internal successors, (1024), 328 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1024 transitions. [2022-02-11 01:03:44,019 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1024 transitions. Word has length 26 [2022-02-11 01:03:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:44,020 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 1024 transitions. [2022-02-11 01:03:44,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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) [2022-02-11 01:03:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1024 transitions. [2022-02-11 01:03:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:03:44,023 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:44,023 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:44,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:44,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-02-11 01:03:44,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1564312640, now seen corresponding path program 2 times [2022-02-11 01:03:44,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:44,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182563142] [2022-02-11 01:03:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:44,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:44,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:44,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182563142] [2022-02-11 01:03:44,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182563142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:44,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100753048] [2022-02-11 01:03:44,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:03:44,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:44,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:44,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:44,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 01:03:44,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:03:44,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:44,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:03:44,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:44,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:03:44,765 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 49 treesize of output 33 [2022-02-11 01:03:44,769 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 75 treesize of output 51 [2022-02-11 01:03:44,933 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 50 treesize of output 38 [2022-02-11 01:03:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:44,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:45,429 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 32 treesize of output 30 [2022-02-11 01:03:45,441 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 36 treesize of output 34 [2022-02-11 01:03:45,461 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 28 treesize of output 26 [2022-02-11 01:03:45,474 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 32 treesize of output 30 [2022-02-11 01:03:46,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:03:46,013 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 8 treesize of output 4 [2022-02-11 01:03:46,019 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 01:03:46,019 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 23 treesize of output 1 [2022-02-11 01:03:46,036 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-02-11 01:03:46,036 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 26 treesize of output 37 [2022-02-11 01:03:46,104 INFO L353 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-02-11 01:03:46,104 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 25 treesize of output 37 [2022-02-11 01:03:46,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:03:46,139 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 27 treesize of output 43 [2022-02-11 01:03:46,184 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-02-11 01:03:46,184 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 28 treesize of output 1 [2022-02-11 01:03:46,191 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 01:03:46,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 01:03:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:46,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100753048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:46,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:46,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-11 01:03:46,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446481405] [2022-02-11 01:03:46,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:46,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:03:46,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:46,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:03:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:03:46,279 INFO L87 Difference]: Start difference. First operand 329 states and 1024 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2022-02-11 01:03:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:46,679 INFO L93 Difference]: Finished difference Result 655 states and 2075 transitions. [2022-02-11 01:03:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:03:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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 [2022-02-11 01:03:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:46,683 INFO L225 Difference]: With dead ends: 655 [2022-02-11 01:03:46,683 INFO L226 Difference]: Without dead ends: 612 [2022-02-11 01:03:46,683 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:03:46,683 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 142 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:46,684 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 122 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:03:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-02-11 01:03:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 349. [2022-02-11 01:03:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1264367816091956) internal successors, (1088), 348 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1088 transitions. [2022-02-11 01:03:46,695 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1088 transitions. Word has length 26 [2022-02-11 01:03:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:46,695 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1088 transitions. [2022-02-11 01:03:46,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2022-02-11 01:03:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1088 transitions. [2022-02-11 01:03:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:03:46,696 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:46,696 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:46,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:46,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:46,916 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1161623412, now seen corresponding path program 3 times [2022-02-11 01:03:46,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:46,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485395739] [2022-02-11 01:03:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:46,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:47,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:47,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485395739] [2022-02-11 01:03:47,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485395739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:47,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528209741] [2022-02-11 01:03:47,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:03:47,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:47,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:47,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 01:03:47,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:03:47,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:03:47,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:47,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:03:47,384 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 52 treesize of output 44 [2022-02-11 01:03:47,421 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 48 treesize of output 32 [2022-02-11 01:03:47,425 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 44 treesize of output 28 [2022-02-11 01:03:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:47,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:48,091 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 32 treesize of output 30 [2022-02-11 01:03:48,108 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 36 treesize of output 34 [2022-02-11 01:03:48,124 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 32 treesize of output 30 [2022-02-11 01:03:48,139 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 28 treesize of output 26 [2022-02-11 01:03:48,676 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 01:03:48,676 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 50 treesize of output 38 [2022-02-11 01:03:48,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:03:48,703 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 58 treesize of output 70 [2022-02-11 01:03:48,798 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:03:48,807 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-02-11 01:03:48,807 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 59 treesize of output 1 [2022-02-11 01:03:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:48,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528209741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:48,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:48,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-11 01:03:48,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481074728] [2022-02-11 01:03:48,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:48,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:03:48,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:48,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:03:48,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:03:48,851 INFO L87 Difference]: Start difference. First operand 349 states and 1088 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:49,189 INFO L93 Difference]: Finished difference Result 558 states and 1755 transitions. [2022-02-11 01:03:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:03:49,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 [2022-02-11 01:03:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:49,192 INFO L225 Difference]: With dead ends: 558 [2022-02-11 01:03:49,192 INFO L226 Difference]: Without dead ends: 499 [2022-02-11 01:03:49,192 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:03:49,192 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 194 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:49,193 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 95 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:03:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-02-11 01:03:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 349. [2022-02-11 01:03:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1436781609195403) internal successors, (1094), 348 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2022-02-11 01:03:49,201 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 26 [2022-02-11 01:03:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:49,201 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2022-02-11 01:03:49,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2022-02-11 01:03:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 01:03:49,202 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:49,202 INFO L515 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, 1, 1] [2022-02-11 01:03:49,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-11 01:03:49,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:49,415 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash -709205764, now seen corresponding path program 4 times [2022-02-11 01:03:49,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:49,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617132645] [2022-02-11 01:03:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:49,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:49,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:49,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617132645] [2022-02-11 01:03:49,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617132645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:49,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210161652] [2022-02-11 01:03:49,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:03:49,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:49,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:49,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:49,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 01:03:49,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:03:49,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:49,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:03:49,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:49,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:49,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210161652] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:49,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:49,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 01:03:49,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293591483] [2022-02-11 01:03:49,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:49,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:03:49,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:49,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:03:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:03:49,568 INFO L87 Difference]: Start difference. First operand 349 states and 1094 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2022-02-11 01:03:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:49,685 INFO L93 Difference]: Finished difference Result 871 states and 2716 transitions. [2022-02-11 01:03:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:03:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 28 [2022-02-11 01:03:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:49,689 INFO L225 Difference]: With dead ends: 871 [2022-02-11 01:03:49,689 INFO L226 Difference]: Without dead ends: 871 [2022-02-11 01:03:49,689 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:03:49,690 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:49,690 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 81 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-02-11 01:03:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 579. [2022-02-11 01:03:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.330449826989619) internal successors, (1925), 578 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1925 transitions. [2022-02-11 01:03:49,704 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1925 transitions. Word has length 28 [2022-02-11 01:03:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:49,704 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1925 transitions. [2022-02-11 01:03:49,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2022-02-11 01:03:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1925 transitions. [2022-02-11 01:03:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 01:03:49,706 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:49,706 INFO L515 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, 1, 1] [2022-02-11 01:03:49,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:49,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-11 01:03:49,919 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1896545024, now seen corresponding path program 5 times [2022-02-11 01:03:49,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:49,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449980713] [2022-02-11 01:03:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:49,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:49,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449980713] [2022-02-11 01:03:49,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449980713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:49,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584538458] [2022-02-11 01:03:49,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:03:49,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:49,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 01:03:49,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:03:49,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:03:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:50,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:50,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584538458] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:50,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:50,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:03:50,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309236652] [2022-02-11 01:03:50,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:50,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:03:50,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:03:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:03:50,056 INFO L87 Difference]: Start difference. First operand 579 states and 1925 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-02-11 01:03:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:50,138 INFO L93 Difference]: Finished difference Result 861 states and 2683 transitions. [2022-02-11 01:03:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:03:50,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 28 [2022-02-11 01:03:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:50,142 INFO L225 Difference]: With dead ends: 861 [2022-02-11 01:03:50,142 INFO L226 Difference]: Without dead ends: 861 [2022-02-11 01:03:50,142 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:03:50,143 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:50,143 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 59 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-02-11 01:03:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 575. [2022-02-11 01:03:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.308362369337979) internal successors, (1899), 574 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1899 transitions. [2022-02-11 01:03:50,158 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1899 transitions. Word has length 28 [2022-02-11 01:03:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:50,158 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1899 transitions. [2022-02-11 01:03:50,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-02-11 01:03:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1899 transitions. [2022-02-11 01:03:50,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 01:03:50,159 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:50,160 INFO L515 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, 1, 1] [2022-02-11 01:03:50,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:50,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:50,376 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash 454285246, now seen corresponding path program 6 times [2022-02-11 01:03:50,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:50,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996246158] [2022-02-11 01:03:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:50,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:50,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:50,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996246158] [2022-02-11 01:03:50,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996246158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:50,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729489897] [2022-02-11 01:03:50,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:03:50,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:50,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:50,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:50,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 01:03:50,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:03:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:03:50,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:50,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:50,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729489897] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:50,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:50,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 01:03:50,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114571937] [2022-02-11 01:03:50,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:50,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:03:50,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:50,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:03:50,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:03:50,524 INFO L87 Difference]: Start difference. First operand 575 states and 1899 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:51,069 INFO L93 Difference]: Finished difference Result 2153 states and 6965 transitions. [2022-02-11 01:03:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:03:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 01:03:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:51,078 INFO L225 Difference]: With dead ends: 2153 [2022-02-11 01:03:51,078 INFO L226 Difference]: Without dead ends: 2153 [2022-02-11 01:03:51,079 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:03:51,079 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 265 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:51,080 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 152 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:03:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-02-11 01:03:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 741. [2022-02-11 01:03:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.574324324324324) internal successors, (2645), 740 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2645 transitions. [2022-02-11 01:03:51,105 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2645 transitions. Word has length 28 [2022-02-11 01:03:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:51,105 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2645 transitions. [2022-02-11 01:03:51,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2645 transitions. [2022-02-11 01:03:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:03:51,107 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:51,107 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:51,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:51,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:51,324 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1068511452, now seen corresponding path program 7 times [2022-02-11 01:03:51,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:51,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574310793] [2022-02-11 01:03:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:51,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:51,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574310793] [2022-02-11 01:03:51,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574310793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:51,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406329216] [2022-02-11 01:03:51,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:03:51,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:51,364 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:51,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 01:03:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:03:51,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:51,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:51,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406329216] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:51,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:51,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 01:03:51,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222309030] [2022-02-11 01:03:51,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:51,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:03:51,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:51,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:03:51,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:03:51,489 INFO L87 Difference]: Start difference. First operand 741 states and 2645 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:51,611 INFO L93 Difference]: Finished difference Result 1909 states and 6809 transitions. [2022-02-11 01:03:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:03:51,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 01:03:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:51,619 INFO L225 Difference]: With dead ends: 1909 [2022-02-11 01:03:51,619 INFO L226 Difference]: Without dead ends: 1747 [2022-02-11 01:03:51,619 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:03:51,620 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:51,620 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 58 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-02-11 01:03:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1449. [2022-02-11 01:03:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.7327348066298343) internal successors, (5405), 1448 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 5405 transitions. [2022-02-11 01:03:51,651 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 5405 transitions. Word has length 29 [2022-02-11 01:03:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:51,652 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 5405 transitions. [2022-02-11 01:03:51,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 5405 transitions. [2022-02-11 01:03:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:03:51,655 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:51,655 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:51,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:51,870 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,SelfDestructingSolverStorable12 [2022-02-11 01:03:51,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:51,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1671938888, now seen corresponding path program 8 times [2022-02-11 01:03:51,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:51,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693166683] [2022-02-11 01:03:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:51,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:51,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:51,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693166683] [2022-02-11 01:03:51,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693166683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:51,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705976478] [2022-02-11 01:03:51,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:03:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:51,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:51,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:51,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 01:03:51,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:03:51,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:03:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:51,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:52,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705976478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:52,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:52,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-02-11 01:03:52,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265803219] [2022-02-11 01:03:52,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:52,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:03:52,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:03:52,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:03:52,039 INFO L87 Difference]: Start difference. First operand 1449 states and 5405 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:52,519 INFO L93 Difference]: Finished difference Result 3995 states and 14025 transitions. [2022-02-11 01:03:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 01:03:52,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 01:03:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:52,537 INFO L225 Difference]: With dead ends: 3995 [2022-02-11 01:03:52,537 INFO L226 Difference]: Without dead ends: 3839 [2022-02-11 01:03:52,537 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:03:52,538 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 442 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:52,538 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 84 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:03:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2022-02-11 01:03:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 2530. [2022-02-11 01:03:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.837089758797944) internal successors, (9704), 2529 states have internal predecessors, (9704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9704 transitions. [2022-02-11 01:03:52,605 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9704 transitions. Word has length 29 [2022-02-11 01:03:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:52,605 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 9704 transitions. [2022-02-11 01:03:52,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9704 transitions. [2022-02-11 01:03:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:03:52,611 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:52,611 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:52,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:52,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-11 01:03:52,828 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1406736764, now seen corresponding path program 9 times [2022-02-11 01:03:52,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:52,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201073439] [2022-02-11 01:03:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:52,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:52,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:52,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201073439] [2022-02-11 01:03:52,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201073439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:52,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081449138] [2022-02-11 01:03:52,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:03:52,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:52,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:52,858 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:52,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 01:03:52,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:03:52,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:03:52,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:52,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:53,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081449138] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:53,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:53,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:03:53,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976983299] [2022-02-11 01:03:53,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:53,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:03:53,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:03:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:03:53,005 INFO L87 Difference]: Start difference. First operand 2530 states and 9704 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-02-11 01:03:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:53,102 INFO L93 Difference]: Finished difference Result 3602 states and 13510 transitions. [2022-02-11 01:03:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 01:03:53,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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 29 [2022-02-11 01:03:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:53,121 INFO L225 Difference]: With dead ends: 3602 [2022-02-11 01:03:53,121 INFO L226 Difference]: Without dead ends: 3568 [2022-02-11 01:03:53,122 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:03:53,122 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:53,122 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 57 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-02-11 01:03:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3231. [2022-02-11 01:03:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 3.8625386996904023) internal successors, (12476), 3230 states have internal predecessors, (12476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 12476 transitions. [2022-02-11 01:03:53,197 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 12476 transitions. Word has length 29 [2022-02-11 01:03:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:53,197 INFO L470 AbstractCegarLoop]: Abstraction has 3231 states and 12476 transitions. [2022-02-11 01:03:53,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-02-11 01:03:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 12476 transitions. [2022-02-11 01:03:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:03:53,205 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:53,205 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:53,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:53,419 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,SelfDestructingSolverStorable14 [2022-02-11 01:03:53,419 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:53,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash 466613648, now seen corresponding path program 10 times [2022-02-11 01:03:53,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:53,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126985848] [2022-02-11 01:03:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:53,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:53,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:53,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126985848] [2022-02-11 01:03:53,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126985848] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:53,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24519850] [2022-02-11 01:03:53,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:03:53,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:53,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:53,444 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:53,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 01:03:53,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:03:53,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:53,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:03:53,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:53,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:53,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24519850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:53,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:53,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:03:53,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558816114] [2022-02-11 01:03:53,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:53,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:03:53,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:03:53,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:03:53,556 INFO L87 Difference]: Start difference. First operand 3231 states and 12476 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-02-11 01:03:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:53,646 INFO L93 Difference]: Finished difference Result 3778 states and 14160 transitions. [2022-02-11 01:03:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:03:53,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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 29 [2022-02-11 01:03:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:53,657 INFO L225 Difference]: With dead ends: 3778 [2022-02-11 01:03:53,657 INFO L226 Difference]: Without dead ends: 3778 [2022-02-11 01:03:53,657 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:03:53,657 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:53,657 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 64 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2022-02-11 01:03:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3280. [2022-02-11 01:03:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 3.868862458066484) internal successors, (12686), 3279 states have internal predecessors, (12686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 12686 transitions. [2022-02-11 01:03:53,753 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 12686 transitions. Word has length 29 [2022-02-11 01:03:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:53,753 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 12686 transitions. [2022-02-11 01:03:53,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-02-11 01:03:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 12686 transitions. [2022-02-11 01:03:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:03:53,761 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:53,761 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:53,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:53,975 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,SelfDestructingSolverStorable15 [2022-02-11 01:03:53,975 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash -339625636, now seen corresponding path program 11 times [2022-02-11 01:03:53,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:53,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279570172] [2022-02-11 01:03:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:53,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:54,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:54,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279570172] [2022-02-11 01:03:54,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279570172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:54,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297251827] [2022-02-11 01:03:54,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:03:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:54,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:54,001 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:54,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 01:03:54,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:03:54,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:54,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:03:54,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:54,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:54,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297251827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:54,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:54,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 01:03:54,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121088620] [2022-02-11 01:03:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:54,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:03:54,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:03:54,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:03:54,110 INFO L87 Difference]: Start difference. First operand 3280 states and 12686 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2022-02-11 01:03:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:54,226 INFO L93 Difference]: Finished difference Result 3719 states and 13964 transitions. [2022-02-11 01:03:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:03:54,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 29 [2022-02-11 01:03:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:54,237 INFO L225 Difference]: With dead ends: 3719 [2022-02-11 01:03:54,237 INFO L226 Difference]: Without dead ends: 3719 [2022-02-11 01:03:54,238 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:03:54,239 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:54,239 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 72 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2022-02-11 01:03:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3290. [2022-02-11 01:03:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 3.834296138643965) internal successors, (12611), 3289 states have internal predecessors, (12611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 12611 transitions. [2022-02-11 01:03:54,319 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 12611 transitions. Word has length 29 [2022-02-11 01:03:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:54,320 INFO L470 AbstractCegarLoop]: Abstraction has 3290 states and 12611 transitions. [2022-02-11 01:03:54,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2022-02-11 01:03:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 12611 transitions. [2022-02-11 01:03:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 01:03:54,329 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:54,329 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:54,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:54,543 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,SelfDestructingSolverStorable16 [2022-02-11 01:03:54,543 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash 669340768, now seen corresponding path program 12 times [2022-02-11 01:03:54,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:54,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34720961] [2022-02-11 01:03:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:54,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:54,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:54,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34720961] [2022-02-11 01:03:54,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34720961] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:54,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639048314] [2022-02-11 01:03:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:03:54,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:54,570 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:54,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 01:03:54,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:03:54,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:54,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:03:54,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:54,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:54,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639048314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:54,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:54,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 01:03:54,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092546558] [2022-02-11 01:03:54,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:54,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:03:54,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:03:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:03:54,688 INFO L87 Difference]: Start difference. First operand 3290 states and 12611 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2022-02-11 01:03:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:54,854 INFO L93 Difference]: Finished difference Result 6009 states and 21708 transitions. [2022-02-11 01:03:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:03:54,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 31 [2022-02-11 01:03:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:54,873 INFO L225 Difference]: With dead ends: 6009 [2022-02-11 01:03:54,873 INFO L226 Difference]: Without dead ends: 5981 [2022-02-11 01:03:54,874 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:03:54,874 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 98 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:54,874 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 115 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:03:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2022-02-11 01:03:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 4628. [2022-02-11 01:03:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 3.7905770477631293) internal successors, (17539), 4627 states have internal predecessors, (17539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 17539 transitions. [2022-02-11 01:03:55,003 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 17539 transitions. Word has length 31 [2022-02-11 01:03:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:55,004 INFO L470 AbstractCegarLoop]: Abstraction has 4628 states and 17539 transitions. [2022-02-11 01:03:55,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2022-02-11 01:03:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 17539 transitions. [2022-02-11 01:03:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 01:03:55,014 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:55,014 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:55,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:55,230 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,SelfDestructingSolverStorable17 [2022-02-11 01:03:55,231 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1344478628, now seen corresponding path program 13 times [2022-02-11 01:03:55,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:55,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101071460] [2022-02-11 01:03:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:55,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:55,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:55,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101071460] [2022-02-11 01:03:55,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101071460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:55,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89017943] [2022-02-11 01:03:55,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:03:55,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:55,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:55,255 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:55,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 01:03:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:55,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:03:55,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:55,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:03:55,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89017943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:03:55,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:03:55,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-11 01:03:55,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347488209] [2022-02-11 01:03:55,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:03:55,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:03:55,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:03:55,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:03:55,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:03:55,376 INFO L87 Difference]: Start difference. First operand 4628 states and 17539 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:03:55,829 INFO L93 Difference]: Finished difference Result 6507 states and 22973 transitions. [2022-02-11 01:03:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 01:03:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-11 01:03:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:03:55,856 INFO L225 Difference]: With dead ends: 6507 [2022-02-11 01:03:55,856 INFO L226 Difference]: Without dead ends: 6444 [2022-02-11 01:03:55,856 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:03:55,857 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 227 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:03:55,857 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 147 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:03:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6444 states. [2022-02-11 01:03:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6444 to 4591. [2022-02-11 01:03:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 3.7444444444444445) internal successors, (17187), 4590 states have internal predecessors, (17187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 17187 transitions. [2022-02-11 01:03:55,981 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 17187 transitions. Word has length 31 [2022-02-11 01:03:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:03:55,981 INFO L470 AbstractCegarLoop]: Abstraction has 4591 states and 17187 transitions. [2022-02-11 01:03:55,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:03:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 17187 transitions. [2022-02-11 01:03:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:03:55,990 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:03:55,990 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:03:56,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 01:03:56,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:56,208 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:03:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:03:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1424343976, now seen corresponding path program 14 times [2022-02-11 01:03:56,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:03:56,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928484974] [2022-02-11 01:03:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:03:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:03:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:03:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:57,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:03:57,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928484974] [2022-02-11 01:03:57,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928484974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:03:57,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097028039] [2022-02-11 01:03:57,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:03:57,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:03:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:03:57,287 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:03:57,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 01:03:57,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:03:57,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:03:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:03:57,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:03:58,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:03:58,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 74 [2022-02-11 01:03:58,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 117 [2022-02-11 01:03:58,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-02-11 01:03:59,040 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 104 treesize of output 72 [2022-02-11 01:03:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:03:59,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:03:59,261 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 210 treesize of output 202 [2022-02-11 01:03:59,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:03:59,308 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 90 treesize of output 84 [2022-02-11 01:04:06,999 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-11 01:04:07,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1046 treesize of output 808 [2022-02-11 01:04:10,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:10,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:10,799 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:04:10,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1175 treesize of output 1 [2022-02-11 01:04:10,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:10,864 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:04:10,864 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 26 treesize of output 1 [2022-02-11 01:04:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:04:10,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097028039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:04:10,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:04:10,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-02-11 01:04:10,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185734465] [2022-02-11 01:04:10,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:04:10,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:04:10,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:04:10,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:04:10,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:04:10,911 INFO L87 Difference]: Start difference. First operand 4591 states and 17187 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:04:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:04:12,829 INFO L93 Difference]: Finished difference Result 7418 states and 26922 transitions. [2022-02-11 01:04:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 01:04:12,830 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:04:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:04:12,848 INFO L225 Difference]: With dead ends: 7418 [2022-02-11 01:04:12,848 INFO L226 Difference]: Without dead ends: 7305 [2022-02-11 01:04:12,849 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:04:12,849 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 227 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:04:12,849 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 197 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:04:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7305 states. [2022-02-11 01:04:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7305 to 5038. [2022-02-11 01:04:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 3.7202700019853086) internal successors, (18739), 5037 states have internal predecessors, (18739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:04:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 18739 transitions. [2022-02-11 01:04:12,966 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 18739 transitions. Word has length 33 [2022-02-11 01:04:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:04:12,966 INFO L470 AbstractCegarLoop]: Abstraction has 5038 states and 18739 transitions. [2022-02-11 01:04:12,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:04:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 18739 transitions. [2022-02-11 01:04:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:04:12,976 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:04:12,976 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:04:12,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 01:04:13,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:04:13,187 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:04:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:04:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1674310878, now seen corresponding path program 15 times [2022-02-11 01:04:13,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:04:13,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153622539] [2022-02-11 01:04:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:04:13,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:04:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:04:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:04:13,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:04:13,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153622539] [2022-02-11 01:04:13,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153622539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:04:13,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101945923] [2022-02-11 01:04:13,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:04:13,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:04:13,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:04:13,859 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:04:13,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 01:04:13,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:04:13,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:04:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 01:04:13,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:04:14,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:04:15,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 73 [2022-02-11 01:04:15,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 118 [2022-02-11 01:04:15,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 70 [2022-02-11 01:04:15,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:04:15,898 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 101 treesize of output 87 [2022-02-11 01:04:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:04:16,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:04:16,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:04:16,604 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 49 treesize of output 47 [2022-02-11 01:04:24,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:24,601 INFO L353 Elim1Store]: treesize reduction 19, result has 78.2 percent of original size [2022-02-11 01:04:24,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 595 treesize of output 472 [2022-02-11 01:04:26,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:26,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:26,611 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-02-11 01:04:26,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 617 treesize of output 473 [2022-02-11 01:04:27,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:27,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:27,296 INFO L353 Elim1Store]: treesize reduction 9, result has 88.3 percent of original size [2022-02-11 01:04:27,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 575 treesize of output 452 [2022-02-11 01:04:30,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:30,797 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-02-11 01:04:30,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 597 treesize of output 453 [2022-02-11 01:04:31,981 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 01:04:31,982 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 57 treesize of output 59 [2022-02-11 01:04:32,057 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:04:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:04:32,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101945923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:04:32,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:04:32,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-02-11 01:04:32,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078250358] [2022-02-11 01:04:32,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:04:32,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:04:32,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:04:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:04:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:04:32,115 INFO L87 Difference]: Start difference. First operand 5038 states and 18739 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:04:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:04:38,802 INFO L93 Difference]: Finished difference Result 7267 states and 25868 transitions. [2022-02-11 01:04:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:04:38,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:04:38,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:04:38,819 INFO L225 Difference]: With dead ends: 7267 [2022-02-11 01:04:38,819 INFO L226 Difference]: Without dead ends: 7241 [2022-02-11 01:04:38,820 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=666, Invalid=3890, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:04:38,820 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 492 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 982 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:04:38,820 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 332 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1312 Invalid, 0 Unknown, 982 Unchecked, 1.2s Time] [2022-02-11 01:04:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7241 states. [2022-02-11 01:04:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7241 to 5355. [2022-02-11 01:04:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 5354 states have (on average 3.6903249906611877) internal successors, (19758), 5354 states have internal predecessors, (19758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:04:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 19758 transitions. [2022-02-11 01:04:38,919 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 19758 transitions. Word has length 33 [2022-02-11 01:04:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:04:38,920 INFO L470 AbstractCegarLoop]: Abstraction has 5355 states and 19758 transitions. [2022-02-11 01:04:38,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:04:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 19758 transitions. [2022-02-11 01:04:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:04:38,930 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:04:38,930 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:04:38,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 01:04:39,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:04:39,146 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:04:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:04:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2097490726, now seen corresponding path program 16 times [2022-02-11 01:04:39,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:04:39,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205528316] [2022-02-11 01:04:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:04:39,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:04:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:04:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:04:42,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:04:42,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205528316] [2022-02-11 01:04:42,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205528316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:04:42,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669988793] [2022-02-11 01:04:42,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:04:42,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:04:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:04:42,231 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:04:42,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 01:04:42,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:04:42,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:04:42,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:04:42,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:04:43,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:04:43,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:04:43,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-02-11 01:04:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:04:43,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:04:43,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:43,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 78 [2022-02-11 01:04:43,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:04:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:04:43,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:43,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 127 [2022-02-11 01:04:43,919 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 64 treesize of output 48 [2022-02-11 01:04:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:04:43,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:04:44,195 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:04:44,195 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 204 treesize of output 194 [2022-02-11 01:04:54,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:54,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:54,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:04:54,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 463 treesize of output 419 [2022-02-11 01:04:56,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,592 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:04:56,592 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 45 treesize of output 1 [2022-02-11 01:04:56,601 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:04:56,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,619 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:04:56,619 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 75 treesize of output 1 [2022-02-11 01:04:56,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,635 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:04:56,635 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 76 treesize of output 1 [2022-02-11 01:04:56,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,650 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:04:56,650 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 45 treesize of output 1 [2022-02-11 01:04:56,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,665 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:04:56,666 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 46 treesize of output 1 [2022-02-11 01:04:56,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,680 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:04:56,680 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 75 treesize of output 1 [2022-02-11 01:04:56,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,696 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:04:56,697 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 92 treesize of output 1 [2022-02-11 01:04:56,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,718 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:04:56,718 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 54 treesize of output 1 [2022-02-11 01:04:56,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,737 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:04:56,737 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 53 treesize of output 1 [2022-02-11 01:04:56,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,754 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:04:56,754 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 91 treesize of output 1 [2022-02-11 01:04:56,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,772 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:04:56,772 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 79 treesize of output 1 [2022-02-11 01:04:56,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,787 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:04:56,787 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 45 treesize of output 1 [2022-02-11 01:04:56,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,805 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:04:56,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 1 [2022-02-11 01:04:56,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,823 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:04:56,824 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 96 treesize of output 1 [2022-02-11 01:04:56,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,839 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:04:56,839 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 79 treesize of output 1 [2022-02-11 01:04:56,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,857 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:04:56,857 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 45 treesize of output 1 [2022-02-11 01:04:56,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,878 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:04:56,878 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 95 treesize of output 1 [2022-02-11 01:04:56,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,896 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:04:56,896 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 80 treesize of output 1 [2022-02-11 01:04:56,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,916 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:04:56,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 1 [2022-02-11 01:04:56,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:56,936 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:04:56,937 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 53 treesize of output 1 [2022-02-11 01:04:57,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:57,039 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:04:57,039 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 2 case distinctions, treesize of input 26 treesize of output 1 [2022-02-11 01:04:57,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:04:57,051 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:04:57,051 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 2 case distinctions, treesize of input 26 treesize of output 1 [2022-02-11 01:04:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:04:57,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669988793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:04:57,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:04:57,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-02-11 01:04:57,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725746754] [2022-02-11 01:04:57,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:04:57,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:04:57,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:04:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:04:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:04:57,109 INFO L87 Difference]: Start difference. First operand 5355 states and 19758 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:05,643 INFO L93 Difference]: Finished difference Result 7345 states and 26182 transitions. [2022-02-11 01:05:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 01:05:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:05:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:05,662 INFO L225 Difference]: With dead ends: 7345 [2022-02-11 01:05:05,662 INFO L226 Difference]: Without dead ends: 7308 [2022-02-11 01:05:05,662 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:05:05,663 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 251 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:05,663 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 218 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 918 Invalid, 0 Unknown, 138 Unchecked, 0.9s Time] [2022-02-11 01:05:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2022-02-11 01:05:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 6119. [2022-02-11 01:05:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 6118 states have (on average 3.6426936907486107) internal successors, (22286), 6118 states have internal predecessors, (22286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 22286 transitions. [2022-02-11 01:05:05,776 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 22286 transitions. Word has length 33 [2022-02-11 01:05:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:05,776 INFO L470 AbstractCegarLoop]: Abstraction has 6119 states and 22286 transitions. [2022-02-11 01:05:05,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 22286 transitions. [2022-02-11 01:05:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:05:05,788 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:05,788 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:05,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:06,004 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash -856978606, now seen corresponding path program 17 times [2022-02-11 01:05:06,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:06,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833254667] [2022-02-11 01:05:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:06,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:06,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:06,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833254667] [2022-02-11 01:05:06,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833254667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:06,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025856872] [2022-02-11 01:05:06,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:05:06,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:06,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:06,702 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:05:06,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 01:05:06,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:05:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:05:06,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:07,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 01:05:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:08,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-02-11 01:05:08,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 78 [2022-02-11 01:05:08,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2022-02-11 01:05:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:05:08,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:08,509 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 39 treesize of output 27 [2022-02-11 01:05:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:08,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:08,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:08,827 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 186 treesize of output 176 [2022-02-11 01:05:20,009 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-02-11 01:05:20,009 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 257 treesize of output 222 [2022-02-11 01:05:20,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,266 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-11 01:05:20,266 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 304 treesize of output 252 [2022-02-11 01:05:20,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,536 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:05:20,537 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 305 treesize of output 1 [2022-02-11 01:05:20,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,553 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:05:20,554 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 211 treesize of output 171 [2022-02-11 01:05:20,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,638 INFO L353 Elim1Store]: treesize reduction 29, result has 35.6 percent of original size [2022-02-11 01:05:20,639 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 256 treesize of output 207 [2022-02-11 01:05:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,683 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:05:20,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 1 [2022-02-11 01:05:20,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,703 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:05:20,703 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 183 treesize of output 1 [2022-02-11 01:05:20,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,727 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:05:20,727 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 183 treesize of output 1 [2022-02-11 01:05:20,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,749 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:05:20,749 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 207 treesize of output 1 [2022-02-11 01:05:20,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:20,903 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:05:20,903 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 26 treesize of output 1 [2022-02-11 01:05:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:20,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025856872] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:20,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:20,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-02-11 01:05:20,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552386469] [2022-02-11 01:05:20,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:20,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 01:05:20,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:20,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 01:05:20,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:05:20,966 INFO L87 Difference]: Start difference. First operand 6119 states and 22286 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:26,569 INFO L93 Difference]: Finished difference Result 11143 states and 39400 transitions. [2022-02-11 01:05:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 01:05:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:05:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:26,594 INFO L225 Difference]: With dead ends: 11143 [2022-02-11 01:05:26,594 INFO L226 Difference]: Without dead ends: 10631 [2022-02-11 01:05:26,594 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=470, Invalid=2722, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 01:05:26,595 INFO L934 BasicCegarLoop]: 50 mSDtfsCounter, 397 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:26,595 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 442 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1515 Invalid, 0 Unknown, 535 Unchecked, 1.4s Time] [2022-02-11 01:05:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2022-02-11 01:05:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 5406. [2022-02-11 01:05:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 5405 states have (on average 3.706382978723404) internal successors, (20033), 5405 states have internal predecessors, (20033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 20033 transitions. [2022-02-11 01:05:26,732 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 20033 transitions. Word has length 33 [2022-02-11 01:05:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:26,732 INFO L470 AbstractCegarLoop]: Abstraction has 5406 states and 20033 transitions. [2022-02-11 01:05:26,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 20033 transitions. [2022-02-11 01:05:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:05:26,743 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:26,743 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:26,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:26,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:26,943 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash -720009752, now seen corresponding path program 18 times [2022-02-11 01:05:26,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:26,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88346614] [2022-02-11 01:05:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:26,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:05:26,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:26,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88346614] [2022-02-11 01:05:26,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88346614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:26,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508436401] [2022-02-11 01:05:26,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:05:26,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:26,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:26,981 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:05:26,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 01:05:27,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:05:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:27,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:05:27,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:05:27,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:05:27,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508436401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:27,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:27,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:05:27,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720134866] [2022-02-11 01:05:27,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:27,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:05:27,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:05:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:05:27,108 INFO L87 Difference]: Start difference. First operand 5406 states and 20033 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:27,188 INFO L93 Difference]: Finished difference Result 7448 states and 26798 transitions. [2022-02-11 01:05:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:05:27,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 33 [2022-02-11 01:05:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:27,205 INFO L225 Difference]: With dead ends: 7448 [2022-02-11 01:05:27,205 INFO L226 Difference]: Without dead ends: 7230 [2022-02-11 01:05:27,205 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:05:27,206 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:27,206 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 45 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:05:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7230 states. [2022-02-11 01:05:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7230 to 6284. [2022-02-11 01:05:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6284 states, 6283 states have (on average 3.586344103135445) internal successors, (22533), 6283 states have internal predecessors, (22533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6284 states to 6284 states and 22533 transitions. [2022-02-11 01:05:27,310 INFO L78 Accepts]: Start accepts. Automaton has 6284 states and 22533 transitions. Word has length 33 [2022-02-11 01:05:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:27,310 INFO L470 AbstractCegarLoop]: Abstraction has 6284 states and 22533 transitions. [2022-02-11 01:05:27,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 6284 states and 22533 transitions. [2022-02-11 01:05:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:05:27,320 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:27,320 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:27,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:27,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:27,521 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1696023130, now seen corresponding path program 19 times [2022-02-11 01:05:27,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:27,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149679091] [2022-02-11 01:05:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:28,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:28,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149679091] [2022-02-11 01:05:28,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149679091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:28,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642715355] [2022-02-11 01:05:28,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:05:28,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:28,837 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:05:28,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 01:05:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:28,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:05:28,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:29,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:05:29,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 71 [2022-02-11 01:05:29,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-02-11 01:05:29,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-02-11 01:05:30,144 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 64 treesize of output 48 [2022-02-11 01:05:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:30,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:31,099 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:05:31,099 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 1434 treesize of output 1386 [2022-02-11 01:05:39,268 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-11 01:05:39,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 497 treesize of output 429 [2022-02-11 01:05:41,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,066 INFO L353 Elim1Store]: treesize reduction 22, result has 71.4 percent of original size [2022-02-11 01:05:41,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 99 treesize of output 113 [2022-02-11 01:05:41,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,216 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:05:41,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 131 treesize of output 1 [2022-02-11 01:05:41,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,243 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:05:41,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 124 treesize of output 1 [2022-02-11 01:05:41,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,273 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:05:41,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 309 treesize of output 1 [2022-02-11 01:05:41,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,298 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:05:41,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 468 treesize of output 1 [2022-02-11 01:05:41,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:41,372 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:05:41,372 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 26 treesize of output 1 [2022-02-11 01:05:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:41,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642715355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:05:41,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:05:41,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-02-11 01:05:41,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994799824] [2022-02-11 01:05:41,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:05:41,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:05:41,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:05:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:05:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:05:41,424 INFO L87 Difference]: Start difference. First operand 6284 states and 22533 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:05:46,270 INFO L93 Difference]: Finished difference Result 11451 states and 39428 transitions. [2022-02-11 01:05:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:05:46,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:05:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:05:46,297 INFO L225 Difference]: With dead ends: 11451 [2022-02-11 01:05:46,297 INFO L226 Difference]: Without dead ends: 11370 [2022-02-11 01:05:46,298 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:05:46,298 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 267 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:05:46,298 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 347 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1535 Invalid, 0 Unknown, 324 Unchecked, 1.3s Time] [2022-02-11 01:05:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2022-02-11 01:05:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 6742. [2022-02-11 01:05:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 6741 states have (on average 3.57929090639371) internal successors, (24128), 6741 states have internal predecessors, (24128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 24128 transitions. [2022-02-11 01:05:46,458 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 24128 transitions. Word has length 33 [2022-02-11 01:05:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:05:46,458 INFO L470 AbstractCegarLoop]: Abstraction has 6742 states and 24128 transitions. [2022-02-11 01:05:46,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:05:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 24128 transitions. [2022-02-11 01:05:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:05:46,471 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:05:46,471 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:05:46,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 01:05:46,671 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,SelfDestructingSolverStorable24 [2022-02-11 01:05:46,671 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:05:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:05:46,672 INFO L85 PathProgramCache]: Analyzing trace with hash -499710688, now seen corresponding path program 20 times [2022-02-11 01:05:46,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:05:46,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242767506] [2022-02-11 01:05:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:05:46,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:05:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:05:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:47,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:05:47,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242767506] [2022-02-11 01:05:47,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242767506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:05:47,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095688784] [2022-02-11 01:05:47,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:05:47,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:05:47,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:05:47,650 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:05:47,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 01:05:47,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:05:47,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:05:47,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:05:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:05:48,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:05:49,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-02-11 01:05:49,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 115 [2022-02-11 01:05:49,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 68 [2022-02-11 01:05:49,569 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 64 treesize of output 48 [2022-02-11 01:05:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:05:49,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:05:50,321 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:05:50,321 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 966 treesize of output 926 [2022-02-11 01:05:58,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,277 INFO L353 Elim1Store]: treesize reduction 14, result has 83.9 percent of original size [2022-02-11 01:05:58,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 251 treesize of output 243 [2022-02-11 01:05:58,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:58,806 INFO L353 Elim1Store]: treesize reduction 22, result has 71.4 percent of original size [2022-02-11 01:05:58,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 355 treesize of output 315 [2022-02-11 01:05:59,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:59,116 INFO L353 Elim1Store]: treesize reduction 64, result has 16.9 percent of original size [2022-02-11 01:05:59,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 377 treesize of output 283 [2022-02-11 01:05:59,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:59,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:59,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:05:59,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 239 treesize of output 235 [2022-02-11 01:05:59,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:59,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:05:59,743 INFO L353 Elim1Store]: treesize reduction 22, result has 71.4 percent of original size [2022-02-11 01:05:59,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 341 treesize of output 301 [2022-02-11 01:06:00,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:00,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:00,111 INFO L353 Elim1Store]: treesize reduction 64, result has 16.9 percent of original size [2022-02-11 01:06:00,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 363 treesize of output 269 [2022-02-11 01:06:00,287 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 01:06:00,287 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 57 treesize of output 59 [2022-02-11 01:06:00,335 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:06:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:00,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095688784] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:06:00,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:06:00,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-02-11 01:06:00,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178672097] [2022-02-11 01:06:00,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:06:00,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:06:00,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:06:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:06:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:06:00,382 INFO L87 Difference]: Start difference. First operand 6742 states and 24128 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:06:02,509 INFO L93 Difference]: Finished difference Result 9356 states and 32573 transitions. [2022-02-11 01:06:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 01:06:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:06:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:06:02,530 INFO L225 Difference]: With dead ends: 9356 [2022-02-11 01:06:02,530 INFO L226 Difference]: Without dead ends: 9346 [2022-02-11 01:06:02,530 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:06:02,531 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 193 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:06:02,531 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 273 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1061 Invalid, 0 Unknown, 191 Unchecked, 0.9s Time] [2022-02-11 01:06:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9346 states. [2022-02-11 01:06:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9346 to 6812. [2022-02-11 01:06:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6812 states, 6811 states have (on average 3.5721626780208484) internal successors, (24330), 6811 states have internal predecessors, (24330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6812 states to 6812 states and 24330 transitions. [2022-02-11 01:06:02,679 INFO L78 Accepts]: Start accepts. Automaton has 6812 states and 24330 transitions. Word has length 33 [2022-02-11 01:06:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:06:02,679 INFO L470 AbstractCegarLoop]: Abstraction has 6812 states and 24330 transitions. [2022-02-11 01:06:02,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 6812 states and 24330 transitions. [2022-02-11 01:06:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:06:02,692 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:06:02,692 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:06:02,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 01:06:02,899 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,SelfDestructingSolverStorable25 [2022-02-11 01:06:02,899 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:06:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:06:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash -690408820, now seen corresponding path program 21 times [2022-02-11 01:06:02,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:06:02,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757355710] [2022-02-11 01:06:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:06:02,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:06:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:06:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:03,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:06:03,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757355710] [2022-02-11 01:06:03,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757355710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:06:03,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228762853] [2022-02-11 01:06:03,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:06:03,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:03,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:06:03,819 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:06:03,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 01:06:03,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:06:03,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:06:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:06:03,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:06:04,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-02-11 01:06:12,043 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-02-11 01:06:12,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2022-02-11 01:06:12,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:12,074 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 110 treesize of output 110 [2022-02-11 01:06:12,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:12,104 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 104 treesize of output 104 [2022-02-11 01:06:23,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:06:23,377 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 37 treesize of output 27 [2022-02-11 01:06:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:23,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:06:28,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:06:28,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 698 treesize of output 674 [2022-02-11 01:06:50,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:50,795 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 1384 treesize of output 1121 [2022-02-11 01:06:56,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:06:56,174 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 70 treesize of output 75 [2022-02-11 01:06:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:56,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228762853] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:06:56,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:06:56,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-02-11 01:06:56,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870013733] [2022-02-11 01:06:56,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:06:56,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:06:56,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:06:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:06:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:06:56,313 INFO L87 Difference]: Start difference. First operand 6812 states and 24330 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:06:58,631 INFO L93 Difference]: Finished difference Result 10421 states and 35889 transitions. [2022-02-11 01:06:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:06:58,632 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:06:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:06:58,656 INFO L225 Difference]: With dead ends: 10421 [2022-02-11 01:06:58,657 INFO L226 Difference]: Without dead ends: 10256 [2022-02-11 01:06:58,658 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=676, Invalid=3484, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 01:06:58,658 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 382 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2071 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:06:58,658 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 404 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 505 Invalid, 0 Unknown, 2071 Unchecked, 0.3s Time] [2022-02-11 01:06:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10256 states. [2022-02-11 01:06:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10256 to 6770. [2022-02-11 01:06:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6769 states have (on average 3.575712808391195) internal successors, (24204), 6769 states have internal predecessors, (24204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 24204 transitions. [2022-02-11 01:06:58,844 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 24204 transitions. Word has length 33 [2022-02-11 01:06:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:06:58,844 INFO L470 AbstractCegarLoop]: Abstraction has 6770 states and 24204 transitions. [2022-02-11 01:06:58,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:06:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 24204 transitions. [2022-02-11 01:06:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:06:58,856 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:06:58,856 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:06:58,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 01:06:59,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-11 01:06:59,056 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:06:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:06:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash 317621584, now seen corresponding path program 22 times [2022-02-11 01:06:59,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:06:59,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156969686] [2022-02-11 01:06:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:06:59,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:06:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:06:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:06:59,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:06:59,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156969686] [2022-02-11 01:06:59,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156969686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:06:59,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162245663] [2022-02-11 01:06:59,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:06:59,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:06:59,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:06:59,652 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:06:59,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 01:06:59,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:06:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:06:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 01:06:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:06:59,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:07:00,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 98 [2022-02-11 01:07:00,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 143 [2022-02-11 01:07:00,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 89 [2022-02-11 01:07:01,334 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 94 treesize of output 68 [2022-02-11 01:07:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:01,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:01,872 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 226 treesize of output 218 [2022-02-11 01:07:01,947 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 32 treesize of output 30 [2022-02-11 01:07:01,959 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 210 treesize of output 202 [2022-02-11 01:07:02,016 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 28 treesize of output 26 [2022-02-11 01:07:02,039 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 32 treesize of output 30 [2022-02-11 01:07:02,056 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 36 treesize of output 34 [2022-02-11 01:07:02,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:02,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:02,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:05,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:06,005 INFO L353 Elim1Store]: treesize reduction 14, result has 83.9 percent of original size [2022-02-11 01:07:06,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 358 treesize of output 346 [2022-02-11 01:07:08,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:08,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:08,623 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:07:08,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 343 treesize of output 1 [2022-02-11 01:07:08,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:08,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:08,692 INFO L353 Elim1Store]: treesize reduction 9, result has 88.3 percent of original size [2022-02-11 01:07:08,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 379 treesize of output 370 [2022-02-11 01:07:12,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:12,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:12,386 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-02-11 01:07:12,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 394 treesize of output 368 [2022-02-11 01:07:13,356 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 01:07:13,356 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 57 treesize of output 59 [2022-02-11 01:07:13,413 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:07:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:13,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162245663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:13,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:13,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-02-11 01:07:13,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862958235] [2022-02-11 01:07:13,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:13,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:07:13,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:07:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:07:13,465 INFO L87 Difference]: Start difference. First operand 6770 states and 24204 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:20,737 INFO L93 Difference]: Finished difference Result 13323 states and 45897 transitions. [2022-02-11 01:07:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:07:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:07:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:20,776 INFO L225 Difference]: With dead ends: 13323 [2022-02-11 01:07:20,776 INFO L226 Difference]: Without dead ends: 13185 [2022-02-11 01:07:20,777 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:07:20,777 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 332 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:20,777 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 225 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 01:07:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13185 states. [2022-02-11 01:07:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13185 to 7031. [2022-02-11 01:07:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7031 states, 7030 states have (on average 3.5743954480796587) internal successors, (25128), 7030 states have internal predecessors, (25128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7031 states to 7031 states and 25128 transitions. [2022-02-11 01:07:20,945 INFO L78 Accepts]: Start accepts. Automaton has 7031 states and 25128 transitions. Word has length 33 [2022-02-11 01:07:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:20,945 INFO L470 AbstractCegarLoop]: Abstraction has 7031 states and 25128 transitions. [2022-02-11 01:07:20,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 7031 states and 25128 transitions. [2022-02-11 01:07:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:07:20,957 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:20,957 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:20,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:21,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:21,171 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:21,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1465425218, now seen corresponding path program 23 times [2022-02-11 01:07:21,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:21,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928057712] [2022-02-11 01:07:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:21,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:22,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:22,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928057712] [2022-02-11 01:07:22,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928057712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:22,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556714838] [2022-02-11 01:07:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:07:22,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:22,508 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:22,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 01:07:22,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:07:22,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:22,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 01:07:22,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:22,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:07:23,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2022-02-11 01:07:23,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 123 [2022-02-11 01:07:23,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2022-02-11 01:07:23,706 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 97 treesize of output 69 [2022-02-11 01:07:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:23,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:24,177 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 210 treesize of output 206 [2022-02-11 01:07:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,214 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 50 treesize of output 46 [2022-02-11 01:07:24,226 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 194 treesize of output 190 [2022-02-11 01:07:24,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,270 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 42 [2022-02-11 01:07:24,285 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 194 treesize of output 190 [2022-02-11 01:07:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,334 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 42 [2022-02-11 01:07:24,350 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 210 treesize of output 202 [2022-02-11 01:07:24,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:24,403 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 28 treesize of output 26 [2022-02-11 01:07:27,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:27,148 INFO L353 Elim1Store]: treesize reduction 14, result has 83.9 percent of original size [2022-02-11 01:07:27,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 310 treesize of output 298 [2022-02-11 01:07:28,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:28,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:28,521 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:07:28,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 1 [2022-02-11 01:07:28,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:28,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:28,588 INFO L353 Elim1Store]: treesize reduction 9, result has 88.3 percent of original size [2022-02-11 01:07:28,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 275 treesize of output 266 [2022-02-11 01:07:32,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:32,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:07:32,413 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-02-11 01:07:32,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 290 treesize of output 264 [2022-02-11 01:07:33,261 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 01:07:33,261 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 57 treesize of output 59 [2022-02-11 01:07:33,309 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:07:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:33,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556714838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:33,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:33,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-02-11 01:07:33,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345873832] [2022-02-11 01:07:33,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:33,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:07:33,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:07:33,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:07:33,354 INFO L87 Difference]: Start difference. First operand 7031 states and 25128 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 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) [2022-02-11 01:07:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:38,903 INFO L93 Difference]: Finished difference Result 12621 states and 43474 transitions. [2022-02-11 01:07:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:07:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 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 33 [2022-02-11 01:07:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:38,929 INFO L225 Difference]: With dead ends: 12621 [2022-02-11 01:07:38,929 INFO L226 Difference]: Without dead ends: 12422 [2022-02-11 01:07:38,930 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:07:38,930 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 299 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:38,930 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 265 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:07:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12422 states. [2022-02-11 01:07:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12422 to 7082. [2022-02-11 01:07:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7082 states, 7081 states have (on average 3.5780257025843807) internal successors, (25336), 7081 states have internal predecessors, (25336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7082 states to 7082 states and 25336 transitions. [2022-02-11 01:07:39,072 INFO L78 Accepts]: Start accepts. Automaton has 7082 states and 25336 transitions. Word has length 33 [2022-02-11 01:07:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:39,072 INFO L470 AbstractCegarLoop]: Abstraction has 7082 states and 25336 transitions. [2022-02-11 01:07:39,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 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) [2022-02-11 01:07:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states and 25336 transitions. [2022-02-11 01:07:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:07:39,082 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:39,082 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:39,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:39,283 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,SelfDestructingSolverStorable28 [2022-02-11 01:07:39,283 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:07:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:39,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1488917818, now seen corresponding path program 24 times [2022-02-11 01:07:39,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:39,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406571374] [2022-02-11 01:07:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:39,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:40,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:40,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406571374] [2022-02-11 01:07:40,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406571374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:40,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798064453] [2022-02-11 01:07:40,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:07:40,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:40,411 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:40,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 01:07:40,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:07:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:07:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:40,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-02-11 01:07:40,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:40,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-02-11 01:07:40,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:40,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:40,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 61 [2022-02-11 01:07:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:40,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:07:40,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 53 [2022-02-11 01:07:41,163 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 37 treesize of output 27 [2022-02-11 01:07:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:41,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:42,327 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:07:42,327 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 1040 treesize of output 1008 [2022-02-11 01:07:55,497 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-11 01:07:55,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2185 treesize of output 1647 [2022-02-11 01:08:20,832 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 01:08:20,833 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 122 treesize of output 102 [2022-02-11 01:08:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:21,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798064453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:21,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:21,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-02-11 01:08:21,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76272801] [2022-02-11 01:08:21,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:21,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:08:21,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:08:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:08:21,021 INFO L87 Difference]: Start difference. First operand 7082 states and 25336 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:27,557 INFO L93 Difference]: Finished difference Result 13812 states and 47536 transitions. [2022-02-11 01:08:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:08:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:08:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:27,588 INFO L225 Difference]: With dead ends: 13812 [2022-02-11 01:08:27,588 INFO L226 Difference]: Without dead ends: 13669 [2022-02-11 01:08:27,589 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=437, Invalid=2643, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 01:08:27,589 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 333 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:27,589 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 336 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1702 Invalid, 0 Unknown, 262 Unchecked, 1.6s Time] [2022-02-11 01:08:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13669 states. [2022-02-11 01:08:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13669 to 7095. [2022-02-11 01:08:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7095 states, 7094 states have (on average 3.577107414716662) internal successors, (25376), 7094 states have internal predecessors, (25376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 25376 transitions. [2022-02-11 01:08:27,745 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 25376 transitions. Word has length 33 [2022-02-11 01:08:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:27,745 INFO L470 AbstractCegarLoop]: Abstraction has 7095 states and 25376 transitions. [2022-02-11 01:08:27,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 25376 transitions. [2022-02-11 01:08:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:08:27,756 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:27,756 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:27,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:27,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:27,956 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:27,957 INFO L85 PathProgramCache]: Analyzing trace with hash -817784198, now seen corresponding path program 25 times [2022-02-11 01:08:27,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:27,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934556476] [2022-02-11 01:08:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:28,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:28,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934556476] [2022-02-11 01:08:28,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934556476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:28,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823527443] [2022-02-11 01:08:28,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:08:28,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:28,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:28,599 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:28,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 01:08:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:28,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:08:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:28,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:08:29,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:08:29,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 66 [2022-02-11 01:08:29,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 102 [2022-02-11 01:08:29,960 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 99 treesize of output 69 [2022-02-11 01:08:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:29,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:31,255 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 210 treesize of output 206 [2022-02-11 01:08:31,286 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 194 treesize of output 190 [2022-02-11 01:08:31,344 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 178 treesize of output 174 [2022-02-11 01:08:31,399 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 194 treesize of output 190 [2022-02-11 01:08:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:31,443 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 42 [2022-02-11 01:08:31,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:31,455 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 42 treesize of output 38 [2022-02-11 01:08:31,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:31,487 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 50 treesize of output 46 [2022-02-11 01:08:31,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:31,502 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 42 [2022-02-11 01:08:42,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:42,771 INFO L353 Elim1Store]: treesize reduction 14, result has 83.9 percent of original size [2022-02-11 01:08:42,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 609 treesize of output 497 [2022-02-11 01:08:44,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:44,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:44,451 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:08:44,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 587 treesize of output 1 [2022-02-11 01:08:44,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:44,516 INFO L353 Elim1Store]: treesize reduction 9, result has 88.3 percent of original size [2022-02-11 01:08:44,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 617 treesize of output 512 [2022-02-11 01:08:48,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:48,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:48,936 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-02-11 01:08:48,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 639 treesize of output 513 [2022-02-11 01:08:50,092 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 01:08:50,092 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 57 treesize of output 59 [2022-02-11 01:08:50,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:50,135 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:08:50,135 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 83 treesize of output 1 [2022-02-11 01:08:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:50,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823527443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:50,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:50,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-02-11 01:08:50,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321838568] [2022-02-11 01:08:50,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:50,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:08:50,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:08:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:08:50,181 INFO L87 Difference]: Start difference. First operand 7095 states and 25376 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:57,605 INFO L93 Difference]: Finished difference Result 15331 states and 52668 transitions. [2022-02-11 01:08:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:08:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:08:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:57,641 INFO L225 Difference]: With dead ends: 15331 [2022-02-11 01:08:57,642 INFO L226 Difference]: Without dead ends: 15154 [2022-02-11 01:08:57,642 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=430, Invalid=2540, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 01:08:57,643 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 325 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:57,643 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 346 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-11 01:08:57,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15154 states. [2022-02-11 01:08:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15154 to 7339. [2022-02-11 01:08:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7339 states, 7338 states have (on average 3.582856364131916) internal successors, (26291), 7338 states have internal predecessors, (26291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 26291 transitions. [2022-02-11 01:08:57,816 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 26291 transitions. Word has length 33 [2022-02-11 01:08:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:57,816 INFO L470 AbstractCegarLoop]: Abstraction has 7339 states and 26291 transitions. [2022-02-11 01:08:57,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 26291 transitions. [2022-02-11 01:08:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:08:57,851 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:57,851 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:57,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:58,055 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,SelfDestructingSolverStorable30 [2022-02-11 01:08:58,055 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:08:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash -784457146, now seen corresponding path program 26 times [2022-02-11 01:08:58,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:58,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400500170] [2022-02-11 01:08:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:58,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:58,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:58,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400500170] [2022-02-11 01:08:58,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400500170] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:58,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994800964] [2022-02-11 01:08:58,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:08:58,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:58,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:58,736 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:58,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 01:08:58,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:08:58,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:58,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:08:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:59,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:08:59,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:08:59,578 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 60 treesize of output 48 [2022-02-11 01:08:59,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2022-02-11 01:08:59,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 49 [2022-02-11 01:08:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:59,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:01,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 190 [2022-02-11 01:09:01,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:01,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-02-11 01:09:01,155 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 210 treesize of output 202 [2022-02-11 01:09:01,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:01,256 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 28 treesize of output 26 [2022-02-11 01:09:01,291 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 210 treesize of output 206 [2022-02-11 01:09:01,347 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 194 treesize of output 190 [2022-02-11 01:09:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:01,417 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 50 treesize of output 46 [2022-02-11 01:09:01,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:01,444 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 42 [2022-02-11 01:09:11,656 INFO L353 Elim1Store]: treesize reduction 29, result has 70.1 percent of original size [2022-02-11 01:09:11,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1181 treesize of output 884 [2022-02-11 01:09:16,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:16,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:16,608 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-02-11 01:09:16,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1060 treesize of output 808 [2022-02-11 01:09:17,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:17,911 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:09:17,911 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 26 treesize of output 1 [2022-02-11 01:09:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:17,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994800964] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:17,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:17,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-02-11 01:09:17,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236779746] [2022-02-11 01:09:17,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:17,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:09:17,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:17,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:09:17,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:09:17,962 INFO L87 Difference]: Start difference. First operand 7339 states and 26291 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:23,398 INFO L93 Difference]: Finished difference Result 16370 states and 56336 transitions. [2022-02-11 01:09:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:09:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:09:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:23,438 INFO L225 Difference]: With dead ends: 16370 [2022-02-11 01:09:23,438 INFO L226 Difference]: Without dead ends: 16188 [2022-02-11 01:09:23,439 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 01:09:23,439 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 441 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:23,439 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 325 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-11 01:09:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16188 states. [2022-02-11 01:09:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16188 to 7341. [2022-02-11 01:09:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7341 states, 7340 states have (on average 3.5866485013623977) internal successors, (26326), 7340 states have internal predecessors, (26326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7341 states to 7341 states and 26326 transitions. [2022-02-11 01:09:23,637 INFO L78 Accepts]: Start accepts. Automaton has 7341 states and 26326 transitions. Word has length 33 [2022-02-11 01:09:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:23,637 INFO L470 AbstractCegarLoop]: Abstraction has 7341 states and 26326 transitions. [2022-02-11 01:09:23,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7341 states and 26326 transitions. [2022-02-11 01:09:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:09:23,650 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:23,650 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:23,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:23,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:23,858 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1906539584, now seen corresponding path program 27 times [2022-02-11 01:09:23,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:23,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826903730] [2022-02-11 01:09:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:23,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:24,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:24,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826903730] [2022-02-11 01:09:24,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826903730] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:24,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314252031] [2022-02-11 01:09:24,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:24,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:24,774 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:24,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 01:09:24,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:09:24,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:24,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 01:09:24,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:25,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:09:25,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:25,884 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-02-11 01:09:25,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2022-02-11 01:09:25,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:25,903 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 118 treesize of output 106 [2022-02-11 01:09:25,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:25,920 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 110 treesize of output 98 [2022-02-11 01:09:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:09:29,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:29,044 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 96 treesize of output 80 [2022-02-11 01:09:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:29,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:31,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:09:31,439 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 280 treesize of output 272 [2022-02-11 01:09:56,323 INFO L353 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-02-11 01:09:56,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2248 treesize of output 1711 [2022-02-11 01:10:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:22,924 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:10:22,924 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 26 treesize of output 1 [2022-02-11 01:10:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:22,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314252031] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:22,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:22,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-02-11 01:10:22,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58093344] [2022-02-11 01:10:22,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:22,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:10:22,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:10:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:10:22,988 INFO L87 Difference]: Start difference. First operand 7341 states and 26326 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:29,132 INFO L93 Difference]: Finished difference Result 15251 states and 51803 transitions. [2022-02-11 01:10:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-11 01:10:29,133 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:10:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:29,169 INFO L225 Difference]: With dead ends: 15251 [2022-02-11 01:10:29,170 INFO L226 Difference]: Without dead ends: 15087 [2022-02-11 01:10:29,172 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4070 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1655, Invalid=9056, Unknown=1, NotChecked=0, Total=10712 [2022-02-11 01:10:29,173 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 541 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 4066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2779 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:29,173 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 477 Invalid, 4066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1187 Invalid, 0 Unknown, 2779 Unchecked, 0.8s Time] [2022-02-11 01:10:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15087 states. [2022-02-11 01:10:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15087 to 7443. [2022-02-11 01:10:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 7442 states have (on average 3.5786079011018543) internal successors, (26632), 7442 states have internal predecessors, (26632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 26632 transitions. [2022-02-11 01:10:29,346 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 26632 transitions. Word has length 33 [2022-02-11 01:10:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:29,347 INFO L470 AbstractCegarLoop]: Abstraction has 7443 states and 26632 transitions. [2022-02-11 01:10:29,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 26632 transitions. [2022-02-11 01:10:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:10:29,359 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:29,359 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:29,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:29,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:29,571 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1089207312, now seen corresponding path program 28 times [2022-02-11 01:10:29,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:29,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388376568] [2022-02-11 01:10:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:30,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:30,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388376568] [2022-02-11 01:10:30,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388376568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:30,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831284898] [2022-02-11 01:10:30,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:10:30,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:30,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:30,118 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:30,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 01:10:30,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:10:30,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:10:30,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:30,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:10:31,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:31,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-02-11 01:10:31,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 76 [2022-02-11 01:10:31,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 142 [2022-02-11 01:10:31,556 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 101 treesize of output 71 [2022-02-11 01:10:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:31,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:32,636 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 242 treesize of output 234 [2022-02-11 01:10:32,699 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 226 treesize of output 218 [2022-02-11 01:10:32,741 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 32 treesize of output 30 [2022-02-11 01:10:32,755 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 36 treesize of output 34 [2022-02-11 01:10:32,769 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 32 treesize of output 30 [2022-02-11 01:10:32,781 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 28 treesize of output 26 [2022-02-11 01:10:32,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:32,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:32,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:42,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:42,315 INFO L353 Elim1Store]: treesize reduction 14, result has 83.9 percent of original size [2022-02-11 01:10:42,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 628 treesize of output 522 [2022-02-11 01:10:43,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:43,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:43,935 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:10:43,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 606 treesize of output 1 [2022-02-11 01:10:43,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:43,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:43,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 598 treesize of output 496 [2022-02-11 01:10:46,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:46,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:46,243 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:10:46,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 576 treesize of output 1 [2022-02-11 01:10:46,426 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 01:10:46,427 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 57 treesize of output 59 [2022-02-11 01:10:46,483 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:10:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:46,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831284898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:46,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:46,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-02-11 01:10:46,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421002608] [2022-02-11 01:10:46,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:46,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:10:46,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:10:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:10:46,529 INFO L87 Difference]: Start difference. First operand 7443 states and 26632 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:49,608 INFO L93 Difference]: Finished difference Result 14869 states and 51128 transitions. [2022-02-11 01:10:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 01:10:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:10:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:49,642 INFO L225 Difference]: With dead ends: 14869 [2022-02-11 01:10:49,642 INFO L226 Difference]: Without dead ends: 14545 [2022-02-11 01:10:49,643 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:10:49,643 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 335 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:49,643 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 182 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:10:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14545 states. [2022-02-11 01:10:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14545 to 7544. [2022-02-11 01:10:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 3.5740421582924564) internal successors, (26959), 7543 states have internal predecessors, (26959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 26959 transitions. [2022-02-11 01:10:49,799 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 26959 transitions. Word has length 33 [2022-02-11 01:10:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:49,799 INFO L470 AbstractCegarLoop]: Abstraction has 7544 states and 26959 transitions. [2022-02-11 01:10:49,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 26959 transitions. [2022-02-11 01:10:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:10:49,811 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:49,811 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:49,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:50,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:50,013 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:50,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1070034656, now seen corresponding path program 29 times [2022-02-11 01:10:50,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:50,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835137246] [2022-02-11 01:10:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:50,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:51,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:51,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835137246] [2022-02-11 01:10:51,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835137246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:51,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038374409] [2022-02-11 01:10:51,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:10:51,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:51,403 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:51,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 01:10:51,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:10:51,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 01:10:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:51,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:10:52,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:52,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-02-11 01:10:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:52,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 70 [2022-02-11 01:10:52,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:52,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:52,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 87 [2022-02-11 01:10:52,397 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 57 treesize of output 43 [2022-02-11 01:10:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:52,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:53,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:53,895 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 600 treesize of output 576 [2022-02-11 01:11:04,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:04,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:04,696 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 313 treesize of output 265 [2022-02-11 01:11:05,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,384 INFO L353 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-02-11 01:11:05,385 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 54 treesize of output 62 [2022-02-11 01:11:05,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,430 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-02-11 01:11:05,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 52 [2022-02-11 01:11:05,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,474 INFO L353 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-02-11 01:11:05,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 86 [2022-02-11 01:11:05,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,517 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-02-11 01:11:05,517 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 91 treesize of output 76 [2022-02-11 01:11:05,533 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:11:05,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,549 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:05,550 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 45 treesize of output 1 [2022-02-11 01:11:05,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,564 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:11:05,564 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 45 treesize of output 1 [2022-02-11 01:11:05,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,581 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:05,581 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 46 treesize of output 1 [2022-02-11 01:11:05,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,599 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:05,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 1 [2022-02-11 01:11:05,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,614 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:05,614 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 76 treesize of output 1 [2022-02-11 01:11:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,625 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:11:05,625 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 75 treesize of output 1 [2022-02-11 01:11:05,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,672 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-02-11 01:11:05,672 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 207 treesize of output 170 [2022-02-11 01:11:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,750 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:11:05,750 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 1 [2022-02-11 01:11:05,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,766 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-02-11 01:11:05,766 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 95 treesize of output 1 [2022-02-11 01:11:05,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,782 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:11:05,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 1 [2022-02-11 01:11:05,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,795 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:05,795 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 79 treesize of output 1 [2022-02-11 01:11:05,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,808 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:05,808 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 80 treesize of output 1 [2022-02-11 01:11:05,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,822 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:05,822 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 45 treesize of output 1 [2022-02-11 01:11:05,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,835 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:11:05,836 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 45 treesize of output 1 [2022-02-11 01:11:05,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,847 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:05,847 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 46 treesize of output 1 [2022-02-11 01:11:06,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:06,008 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:11:06,008 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 27 treesize of output 1 [2022-02-11 01:11:06,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:06,015 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:11:06,015 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 26 treesize of output 1 [2022-02-11 01:11:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:06,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038374409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:06,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:06,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-02-11 01:11:06,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619710748] [2022-02-11 01:11:06,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:06,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:11:06,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:06,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:11:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:11:06,075 INFO L87 Difference]: Start difference. First operand 7544 states and 26959 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:10,378 INFO L93 Difference]: Finished difference Result 13919 states and 47947 transitions. [2022-02-11 01:11:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 01:11:10,378 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:11:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:10,404 INFO L225 Difference]: With dead ends: 13919 [2022-02-11 01:11:10,404 INFO L226 Difference]: Without dead ends: 13882 [2022-02-11 01:11:10,405 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=439, Invalid=2423, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 01:11:10,405 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 362 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 627 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:10,405 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 363 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1809 Invalid, 0 Unknown, 627 Unchecked, 1.4s Time] [2022-02-11 01:11:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13882 states. [2022-02-11 01:11:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13882 to 7611. [2022-02-11 01:11:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7611 states, 7610 states have (on average 3.5730617608409987) internal successors, (27191), 7610 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7611 states to 7611 states and 27191 transitions. [2022-02-11 01:11:10,539 INFO L78 Accepts]: Start accepts. Automaton has 7611 states and 27191 transitions. Word has length 33 [2022-02-11 01:11:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:10,540 INFO L470 AbstractCegarLoop]: Abstraction has 7611 states and 27191 transitions. [2022-02-11 01:11:10,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7611 states and 27191 transitions. [2022-02-11 01:11:10,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:11:10,550 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:10,550 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:10,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:10,751 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,SelfDestructingSolverStorable34 [2022-02-11 01:11:10,751 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:10,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1316239934, now seen corresponding path program 30 times [2022-02-11 01:11:10,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:10,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495968452] [2022-02-11 01:11:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:10,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:11,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:11,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495968452] [2022-02-11 01:11:11,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495968452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:11,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067599640] [2022-02-11 01:11:11,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:11:11,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:11,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:11,696 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:11,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 01:11:11,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:11:11,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:11,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:11,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:11:12,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-02-11 01:11:12,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 64 [2022-02-11 01:11:12,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 100 [2022-02-11 01:11:12,918 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 101 treesize of output 71 [2022-02-11 01:11:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:12,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:13,831 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 32 treesize of output 30 [2022-02-11 01:11:13,843 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 36 treesize of output 34 [2022-02-11 01:11:13,861 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 28 treesize of output 26 [2022-02-11 01:11:13,873 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 32 treesize of output 30 [2022-02-11 01:11:13,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:13,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:13,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:13,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:13,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:23,584 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-11 01:11:23,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1128 treesize of output 914 [2022-02-11 01:11:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:28,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:28,660 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:11:28,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1091 treesize of output 1 [2022-02-11 01:11:28,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:28,737 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:11:28,737 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 26 treesize of output 1 [2022-02-11 01:11:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:28,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067599640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:28,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:28,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 01:11:28,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929049252] [2022-02-11 01:11:28,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:28,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:11:28,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:11:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:11:28,786 INFO L87 Difference]: Start difference. First operand 7611 states and 27191 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:34,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:34,568 INFO L93 Difference]: Finished difference Result 15817 states and 54466 transitions. [2022-02-11 01:11:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:11:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:11:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:34,624 INFO L225 Difference]: With dead ends: 15817 [2022-02-11 01:11:34,624 INFO L226 Difference]: Without dead ends: 15690 [2022-02-11 01:11:34,624 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:11:34,624 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 460 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 2084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:34,625 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 264 Invalid, 2084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 01:11:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15690 states. [2022-02-11 01:11:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15690 to 7538. [2022-02-11 01:11:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7538 states, 7537 states have (on average 3.572508955817965) internal successors, (26926), 7537 states have internal predecessors, (26926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 26926 transitions. [2022-02-11 01:11:34,817 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 26926 transitions. Word has length 33 [2022-02-11 01:11:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 7538 states and 26926 transitions. [2022-02-11 01:11:34,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 26926 transitions. [2022-02-11 01:11:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:11:34,829 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:34,829 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:34,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:35,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-11 01:11:35,030 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash 889067426, now seen corresponding path program 31 times [2022-02-11 01:11:35,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:35,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432238688] [2022-02-11 01:11:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:35,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:35,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:35,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432238688] [2022-02-11 01:11:35,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432238688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:35,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598307074] [2022-02-11 01:11:35,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:11:35,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:35,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:35,756 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:35,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 01:11:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:35,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 01:11:35,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:35,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-02-11 01:11:36,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:36,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:36,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 68 [2022-02-11 01:11:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:36,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 107 [2022-02-11 01:11:36,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:36,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-02-11 01:11:36,877 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 37 treesize of output 27 [2022-02-11 01:11:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:36,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:45,102 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:11:45,103 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 12466 treesize of output 12106 [2022-02-11 01:12:04,298 INFO L353 Elim1Store]: treesize reduction 29, result has 70.1 percent of original size [2022-02-11 01:12:04,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 975 treesize of output 776 [2022-02-11 01:12:09,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:09,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:10,023 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-02-11 01:12:10,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1012 treesize of output 784 [2022-02-11 01:12:11,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:11,185 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:12:11,186 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 26 treesize of output 1 [2022-02-11 01:12:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:11,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598307074] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:11,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:11,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2022-02-11 01:12:11,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373438175] [2022-02-11 01:12:11,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:11,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:12:11,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:12:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:12:11,238 INFO L87 Difference]: Start difference. First operand 7538 states and 26926 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:16,833 INFO L93 Difference]: Finished difference Result 11955 states and 40282 transitions. [2022-02-11 01:12:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:12:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:12:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:16,858 INFO L225 Difference]: With dead ends: 11955 [2022-02-11 01:12:16,858 INFO L226 Difference]: Without dead ends: 11894 [2022-02-11 01:12:16,859 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=699, Invalid=4271, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 01:12:16,859 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 403 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 3446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 910 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:16,859 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 518 Invalid, 3446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2465 Invalid, 0 Unknown, 910 Unchecked, 1.8s Time] [2022-02-11 01:12:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2022-02-11 01:12:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 7963. [2022-02-11 01:12:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.573348404923386) internal successors, (28451), 7962 states have internal predecessors, (28451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 28451 transitions. [2022-02-11 01:12:17,015 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 28451 transitions. Word has length 33 [2022-02-11 01:12:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:17,015 INFO L470 AbstractCegarLoop]: Abstraction has 7963 states and 28451 transitions. [2022-02-11 01:12:17,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 28451 transitions. [2022-02-11 01:12:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:12:17,027 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:17,027 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:17,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:17,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:17,235 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2085379868, now seen corresponding path program 32 times [2022-02-11 01:12:17,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:17,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11712741] [2022-02-11 01:12:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:17,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:18,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:18,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11712741] [2022-02-11 01:12:18,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11712741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:18,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761404514] [2022-02-11 01:12:18,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:12:18,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:18,501 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:18,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 01:12:18,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:12:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:12:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:18,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-02-11 01:12:19,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:19,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-02-11 01:12:19,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 76 [2022-02-11 01:12:19,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 127 [2022-02-11 01:12:20,099 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 64 treesize of output 48 [2022-02-11 01:12:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:20,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:30,692 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:12:30,692 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 5693 treesize of output 5495 [2022-02-11 01:12:47,274 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-11 01:12:47,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1173 treesize of output 965 [2022-02-11 01:13:02,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:02,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:02,075 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:13:02,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1191 treesize of output 1 [2022-02-11 01:13:02,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:02,163 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:13:02,163 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 26 treesize of output 1 [2022-02-11 01:13:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:02,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761404514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:02,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:02,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 01:13:02,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459904686] [2022-02-11 01:13:02,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:02,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:13:02,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:02,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:13:02,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:13:02,227 INFO L87 Difference]: Start difference. First operand 7963 states and 28451 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:08,825 INFO L93 Difference]: Finished difference Result 11263 states and 38543 transitions. [2022-02-11 01:13:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 01:13:08,825 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:13:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:08,850 INFO L225 Difference]: With dead ends: 11263 [2022-02-11 01:13:08,850 INFO L226 Difference]: Without dead ends: 11212 [2022-02-11 01:13:08,851 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 01:13:08,851 INFO L934 BasicCegarLoop]: 38 mSDtfsCounter, 456 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 978 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:08,851 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 373 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1320 Invalid, 0 Unknown, 978 Unchecked, 1.2s Time] [2022-02-11 01:13:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2022-02-11 01:13:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 8122. [2022-02-11 01:13:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8122 states, 8121 states have (on average 3.5690185937692402) internal successors, (28984), 8121 states have internal predecessors, (28984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 28984 transitions. [2022-02-11 01:13:09,001 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 28984 transitions. Word has length 33 [2022-02-11 01:13:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:09,001 INFO L470 AbstractCegarLoop]: Abstraction has 8122 states and 28984 transitions. [2022-02-11 01:13:09,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 28984 transitions. [2022-02-11 01:13:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:13:09,013 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:09,013 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:09,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:09,213 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,SelfDestructingSolverStorable37 [2022-02-11 01:13:09,214 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:09,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1699979628, now seen corresponding path program 33 times [2022-02-11 01:13:09,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:09,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766181130] [2022-02-11 01:13:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:09,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:10,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:10,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766181130] [2022-02-11 01:13:10,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766181130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:10,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047054379] [2022-02-11 01:13:10,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:10,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:10,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:10,463 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:10,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 01:13:10,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:13:10,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:10,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:13:10,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:10,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:13:11,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2022-02-11 01:13:11,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 123 [2022-02-11 01:13:11,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 74 [2022-02-11 01:13:11,986 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 64 treesize of output 48 [2022-02-11 01:13:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:12,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:20,022 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:13:20,023 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 7169 treesize of output 6919 [2022-02-11 01:13:33,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,043 INFO L353 Elim1Store]: treesize reduction 5, result has 88.9 percent of original size [2022-02-11 01:13:33,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 107 [2022-02-11 01:13:33,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,276 INFO L353 Elim1Store]: treesize reduction 14, result has 68.9 percent of original size [2022-02-11 01:13:33,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 97 [2022-02-11 01:13:33,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,348 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:13:33,349 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 79 treesize of output 55 [2022-02-11 01:13:33,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,397 INFO L353 Elim1Store]: treesize reduction 10, result has 77.8 percent of original size [2022-02-11 01:13:33,398 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 45 treesize of output 65 [2022-02-11 01:13:33,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,514 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-02-11 01:13:33,514 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 54 treesize of output 67 [2022-02-11 01:13:33,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-02-11 01:13:33,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,591 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-02-11 01:13:33,591 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 53 treesize of output 52 [2022-02-11 01:13:33,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,607 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:13:33,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 1 [2022-02-11 01:13:33,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,622 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-02-11 01:13:33,622 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 46 treesize of output 1 [2022-02-11 01:13:33,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,662 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-02-11 01:13:33,662 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 92 treesize of output 91 [2022-02-11 01:13:33,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,735 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-02-11 01:13:33,735 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 91 treesize of output 76 [2022-02-11 01:13:33,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:33,786 INFO L353 Elim1Store]: treesize reduction 5, result has 88.9 percent of original size [2022-02-11 01:13:33,787 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 96 treesize of output 111 [2022-02-11 01:13:34,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:34,121 INFO L353 Elim1Store]: treesize reduction 14, result has 68.9 percent of original size [2022-02-11 01:13:34,121 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 95 treesize of output 101 [2022-02-11 01:13:34,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:34,299 INFO L353 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-02-11 01:13:34,299 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 96 treesize of output 90 [2022-02-11 01:13:34,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:34,354 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-02-11 01:13:34,355 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 95 treesize of output 80 [2022-02-11 01:13:34,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:34,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:34,424 INFO L353 Elim1Store]: treesize reduction 68, result has 11.7 percent of original size [2022-02-11 01:13:34,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 402 treesize of output 290 [2022-02-11 01:13:34,567 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-11 01:13:34,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:34,586 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:13:34,586 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 75 treesize of output 1 [2022-02-11 01:13:34,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:34,775 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:13:34,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2022-02-11 01:13:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:34,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047054379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:34,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:34,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 01:13:34,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249531172] [2022-02-11 01:13:34,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:34,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:13:34,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:13:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:13:34,850 INFO L87 Difference]: Start difference. First operand 8122 states and 28984 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2022-02-11 01:13:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:41,712 INFO L93 Difference]: Finished difference Result 13662 states and 46696 transitions. [2022-02-11 01:13:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:13:41,713 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 33 [2022-02-11 01:13:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:41,741 INFO L225 Difference]: With dead ends: 13662 [2022-02-11 01:13:41,741 INFO L226 Difference]: Without dead ends: 13486 [2022-02-11 01:13:41,741 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=616, Invalid=3806, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 01:13:41,742 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 361 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1041 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:41,742 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 388 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1731 Invalid, 0 Unknown, 1041 Unchecked, 1.5s Time] [2022-02-11 01:13:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2022-02-11 01:13:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 8601. [2022-02-11 01:13:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 8600 states have (on average 3.5601162790697676) internal successors, (30617), 8600 states have internal predecessors, (30617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 30617 transitions. [2022-02-11 01:13:41,898 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 30617 transitions. Word has length 33 [2022-02-11 01:13:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:41,898 INFO L470 AbstractCegarLoop]: Abstraction has 8601 states and 30617 transitions. [2022-02-11 01:13:41,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2022-02-11 01:13:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 30617 transitions. [2022-02-11 01:13:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:13:41,911 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:41,911 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:41,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:42,111 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,SelfDestructingSolverStorable38 [2022-02-11 01:13:42,112 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1119665338, now seen corresponding path program 34 times [2022-02-11 01:13:42,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:42,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991755731] [2022-02-11 01:13:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:42,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:42,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:42,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991755731] [2022-02-11 01:13:42,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991755731] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:42,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55262928] [2022-02-11 01:13:42,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:42,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:42,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:42,539 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:42,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 01:13:42,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:42,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:13:42,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:42,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:13:43,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-02-11 01:13:43,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 66 [2022-02-11 01:13:43,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 114 [2022-02-11 01:13:43,515 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 64 treesize of output 48 [2022-02-11 01:13:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:43,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:54,566 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:13:54,567 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 11630 treesize of output 11342 [2022-02-11 01:14:15,897 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-11 01:14:15,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1260 treesize of output 932 [2022-02-11 01:14:20,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:20,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:20,442 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-02-11 01:14:20,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1231 treesize of output 1 [2022-02-11 01:14:20,549 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 01:14:20,549 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 8 treesize of output 8 [2022-02-11 01:14:20,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:20,577 INFO L353 Elim1Store]: treesize reduction 42, result has 17.6 percent of original size [2022-02-11 01:14:20,577 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 56 treesize of output 32 [2022-02-11 01:14:20,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:20,586 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:14:20,587 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 2 case distinctions, treesize of input 26 treesize of output 1 [2022-02-11 01:14:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:20,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55262928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:20,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:20,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 01:14:20,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269713487] [2022-02-11 01:14:20,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:20,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:14:20,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:14:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:14:20,667 INFO L87 Difference]: Start difference. First operand 8601 states and 30617 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:23,056 INFO L93 Difference]: Finished difference Result 11557 states and 40139 transitions. [2022-02-11 01:14:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 01:14:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:14:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:23,082 INFO L225 Difference]: With dead ends: 11557 [2022-02-11 01:14:23,082 INFO L226 Difference]: Without dead ends: 11504 [2022-02-11 01:14:23,082 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:14:23,083 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 201 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:23,083 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 224 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 762 Invalid, 0 Unknown, 330 Unchecked, 0.7s Time] [2022-02-11 01:14:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11504 states. [2022-02-11 01:14:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11504 to 8672. [2022-02-11 01:14:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8672 states, 8671 states have (on average 3.560950294083727) internal successors, (30877), 8671 states have internal predecessors, (30877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8672 states to 8672 states and 30877 transitions. [2022-02-11 01:14:23,234 INFO L78 Accepts]: Start accepts. Automaton has 8672 states and 30877 transitions. Word has length 33 [2022-02-11 01:14:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:23,234 INFO L470 AbstractCegarLoop]: Abstraction has 8672 states and 30877 transitions. [2022-02-11 01:14:23,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8672 states and 30877 transitions. [2022-02-11 01:14:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:14:23,247 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:23,248 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:23,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:23,448 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,SelfDestructingSolverStorable39 [2022-02-11 01:14:23,448 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:23,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1573702356, now seen corresponding path program 35 times [2022-02-11 01:14:23,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:23,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599996817] [2022-02-11 01:14:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:23,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:24,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:24,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599996817] [2022-02-11 01:14:24,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599996817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:24,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043246183] [2022-02-11 01:14:24,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:14:24,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:24,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:24,156 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) [2022-02-11 01:14:24,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 01:14:24,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:14:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 01:14:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:24,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:14:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:25,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:25,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 144 [2022-02-11 01:14:25,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:25,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:25,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 169 [2022-02-11 01:14:25,411 INFO L353 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-02-11 01:14:25,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 88 [2022-02-11 01:15:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:20,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:20,889 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 97 treesize of output 67 [2022-02-11 01:15:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:20,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:22,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:22,693 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 2986 treesize of output 2890 [2022-02-11 01:15:43,429 INFO L353 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-02-11 01:15:43,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1462 treesize of output 1021 [2022-02-11 01:16:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:16,194 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-02-11 01:16:16,194 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 26 treesize of output 1 [2022-02-11 01:16:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:16,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043246183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:16,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:16,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-02-11 01:16:16,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453423205] [2022-02-11 01:16:16,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:16,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:16:16,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:16:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:16:16,315 INFO L87 Difference]: Start difference. First operand 8672 states and 30877 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:23,314 INFO L93 Difference]: Finished difference Result 15702 states and 53577 transitions. [2022-02-11 01:16:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 01:16:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 01:16:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:23,350 INFO L225 Difference]: With dead ends: 15702 [2022-02-11 01:16:23,350 INFO L226 Difference]: Without dead ends: 15358 [2022-02-11 01:16:23,351 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1209, Invalid=8297, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 01:16:23,351 INFO L934 BasicCegarLoop]: 49 mSDtfsCounter, 492 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 3721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2319 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:23,351 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 546 Invalid, 3721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1337 Invalid, 0 Unknown, 2319 Unchecked, 1.1s Time] [2022-02-11 01:16:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15358 states. [2022-02-11 01:16:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15358 to 9189. [2022-02-11 01:16:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9189 states, 9188 states have (on average 3.552786242925555) internal successors, (32643), 9188 states have internal predecessors, (32643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9189 states to 9189 states and 32643 transitions. [2022-02-11 01:16:23,541 INFO L78 Accepts]: Start accepts. Automaton has 9189 states and 32643 transitions. Word has length 33 [2022-02-11 01:16:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:23,542 INFO L470 AbstractCegarLoop]: Abstraction has 9189 states and 32643 transitions. [2022-02-11 01:16:23,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 9189 states and 32643 transitions. [2022-02-11 01:16:23,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 01:16:23,556 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:23,556 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:23,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-11 01:16:23,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:23,757 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:23,757 INFO L85 PathProgramCache]: Analyzing trace with hash 611427988, now seen corresponding path program 36 times [2022-02-11 01:16:23,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:23,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941932798] [2022-02-11 01:16:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:23,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:24,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:24,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941932798] [2022-02-11 01:16:24,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941932798] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:24,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130905986] [2022-02-11 01:16:24,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:16:24,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:24,567 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) [2022-02-11 01:16:24,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 01:16:24,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:16:24,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:24,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 01:16:24,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:24,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-02-11 01:16:25,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:25,925 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 104 treesize of output 94 [2022-02-11 01:16:25,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:25,942 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 169 treesize of output 151 [2022-02-11 01:16:25,957 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-02-11 01:16:25,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2022-02-11 01:16:30,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:30,234 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 64 treesize of output 48 [2022-02-11 01:16:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:30,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:44,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:44,228 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 9886 treesize of output 9526 Received shutdown request... [2022-02-11 01:16:52,575 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-11 01:16:52,590 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 01:16:52,593 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 01:16:52,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-11 01:16:52,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:52,776 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-14-4-7-4-6-2-1 context. [2022-02-11 01:16:52,777 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-11 01:16:52,778 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-11 01:16:52,778 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-11 01:16:52,780 INFO L733 BasicCegarLoop]: Path program histogram: [36, 3, 2, 1] [2022-02-11 01:16:52,782 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 01:16:52,782 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 01:16:52,783 INFO L202 PluginConnector]: Adding new model three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:16:52 BasicIcfg [2022-02-11 01:16:52,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 01:16:52,783 INFO L158 Benchmark]: Toolchain (without parser) took 793306.11ms. Allocated memory was 185.6MB in the beginning and 864.0MB in the end (delta: 678.4MB). Free memory was 149.6MB in the beginning and 586.1MB in the end (delta: -436.4MB). Peak memory consumption was 718.9MB. Max. memory is 8.0GB. [2022-02-11 01:16:52,784 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:16:52,784 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.67ms. Allocated memory is still 185.6MB. Free memory was 149.6MB in the beginning and 148.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-11 01:16:52,784 INFO L158 Benchmark]: Boogie Preprocessor took 18.16ms. Allocated memory is still 185.6MB. Free memory was 148.0MB in the beginning and 147.1MB in the end (delta: 980.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:16:52,784 INFO L158 Benchmark]: RCFGBuilder took 224.86ms. Allocated memory is still 185.6MB. Free memory was 147.0MB in the beginning and 137.1MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 01:16:52,784 INFO L158 Benchmark]: TraceAbstraction took 793038.69ms. Allocated memory was 185.6MB in the beginning and 864.0MB in the end (delta: 678.4MB). Free memory was 136.6MB in the beginning and 586.1MB in the end (delta: -449.5MB). Peak memory consumption was 705.3MB. Max. memory is 8.0GB. [2022-02-11 01:16:52,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.67ms. Allocated memory is still 185.6MB. Free memory was 149.6MB in the beginning and 148.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.16ms. Allocated memory is still 185.6MB. Free memory was 148.0MB in the beginning and 147.1MB in the end (delta: 980.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 224.86ms. Allocated memory is still 185.6MB. Free memory was 147.0MB in the beginning and 137.1MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 793038.69ms. Allocated memory was 185.6MB in the beginning and 864.0MB in the end (delta: 678.4MB). Free memory was 136.6MB in the beginning and 586.1MB in the end (delta: -449.5MB). Peak memory consumption was 705.3MB. 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: 74]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-14-4-7-4-6-2-1 context. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-14-4-7-4-6-2-1 context. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-14-4-7-4-6-2-1 context. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-14-4-7-4-6-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 793.0s, OverallIterations: 42, TraceHistogramMax: 2, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.4s, AutomataDifference: 116.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9809 SdHoareTripleChecker+Valid, 27.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9809 mSDsluCounter, 8543 SdHoareTripleChecker+Invalid, 24.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13487 IncrementalHoareTripleChecker+Unchecked, 16197 mSDsCounter, 1740 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33629 IncrementalHoareTripleChecker+Invalid, 48856 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1740 mSolverCounterUnsat, 1050 mSDtfsCounter, 33629 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3378 GetRequests, 1899 SyntacticMatches, 72 SemanticMatches, 1407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24608 ImplicationChecksByTransitivity, 117.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9189occurred in iteration=41, InterpolantAutomatonStates: 1143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.2s AutomataMinimizationTime, 41 MinimizatonAttempts, 115867 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 633.1s InterpolantComputationTime, 2347 NumberOfCodeBlocks, 2347 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 3353 ConstructedInterpolants, 149 QuantifiedInterpolants, 347156 SizeOfPredicates, 262 NumberOfNonLiveVariables, 3055 ConjunctsInSsa, 772 ConjunctsInUnsatCore, 113 InterpolantComputations, 5 PerfectInterpolantSequences, 246/1115 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