/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/chl/nzb-file-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-820ea7a [2022-02-18 16:21:51,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-18 16:21:51,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-18 16:21:51,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-18 16:21:51,376 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 [2022-02-18 16:21:51,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-18 16:21:51,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-18 16:21:51,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-18 16:21:51,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-18 16:21:51,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-18 16:21:51,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-18 16:21:51,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-18 16:21:51,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-18 16:21:51,408 INFO L138 SettingsManager]: * Use SBE=true [2022-02-18 16:21:51,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-18 16:21:51,409 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-18 16:21:51,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-18 16:21:51,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-18 16:21:51,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-18 16:21:51,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-18 16:21:51,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-18 16:21:51,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-18 16:21:51,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-18 16:21:51,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-18 16:21:51,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-18 16:21:51,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-18 16:21:51,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-18 16:21:51,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-18 16:21:51,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-18 16:21:51,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-18 16:21:51,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 16:21:51,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-18 16:21:51,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-18 16:21:51,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-18 16:21:51,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-18 16:21:51,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-18 16:21:51,411 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-18 16:21:51,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-18 16:21:51,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-18 16:21:51,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-18 16:21:51,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-18 16:21:51,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-18 16:21:51,641 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-18 16:21:51,642 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-18 16:21:51,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl [2022-02-18 16:21:51,643 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl' [2022-02-18 16:21:51,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-18 16:21:51,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-18 16:21:51,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-18 16:21:51,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-18 16:21:51,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-18 16:21:51,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,706 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-18 16:21:51,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-18 16:21:51,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-18 16:21:51,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-18 16:21:51,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-18 16:21:51,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-18 16:21:51,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-18 16:21:51,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-18 16:21:51,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-18 16:21:51,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/1) ... [2022-02-18 16:21:51,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 16:21:51,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:21:51,754 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) [2022-02-18 16:21:51,777 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 [2022-02-18 16:21:51,795 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-18 16:21:51,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-18 16:21:51,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-18 16:21:51,795 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-18 16:21:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-18 16:21:51,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-18 16:21:51,796 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-18 16:21:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-18 16:21:51,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-18 16:21:51,796 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-18 16:21:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-18 16:21:51,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-18 16:21:51,797 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-18 16:21:51,845 INFO L234 CfgBuilder]: Building ICFG [2022-02-18 16:21:51,847 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-18 16:21:51,997 INFO L275 CfgBuilder]: Performing block encoding [2022-02-18 16:21:52,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-18 16:21:52,128 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-18 16:21:52,130 INFO L202 PluginConnector]: Adding new model nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:21:52 BoogieIcfgContainer [2022-02-18 16:21:52,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-18 16:21:52,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-18 16:21:52,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-18 16:21:52,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-18 16:21:52,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:21:51" (1/2) ... [2022-02-18 16:21:52,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763e603b and model type nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:21:52, skipping insertion in model container [2022-02-18 16:21:52,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:21:52" (2/2) ... [2022-02-18 16:21:52,154 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-subst.wvr.bpl [2022-02-18 16:21:52,157 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-18 16:21:52,158 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-18 16:21:52,158 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-18 16:21:52,158 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-18 16:21:52,210 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-18 16:21:52,246 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-18 16:21:52,251 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-02-18 16:21:52,252 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-18 16:21:52,259 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2022-02-18 16:21:52,301 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:21:52,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:52,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:52,312 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash -29429742, now seen corresponding path program 1 times [2022-02-18 16:21:52,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:52,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365162809] [2022-02-18 16:21:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:52,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:52,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:52,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365162809] [2022-02-18 16:21:52,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365162809] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:52,754 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:52,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:52,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519555327] [2022-02-18 16:21:52,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:52,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:52,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:52,814 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:53,301 INFO L93 Difference]: Finished difference Result 265 states and 821 transitions. [2022-02-18 16:21:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:21:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:53,314 INFO L225 Difference]: With dead ends: 265 [2022-02-18 16:21:53,314 INFO L226 Difference]: Without dead ends: 250 [2022-02-18 16:21:53,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:21:53,319 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:53,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 28 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:21:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-18 16:21:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2022-02-18 16:21:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2022-02-18 16:21:53,367 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2022-02-18 16:21:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:53,368 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2022-02-18 16:21:53,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2022-02-18 16:21:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:21:53,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:53,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:53,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-18 16:21:53,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1669447950, now seen corresponding path program 2 times [2022-02-18 16:21:53,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:53,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378275637] [2022-02-18 16:21:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:53,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:53,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:53,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378275637] [2022-02-18 16:21:53,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378275637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:53,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:53,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:53,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963841455] [2022-02-18 16:21:53,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:53,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:53,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:53,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:53,568 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:53,792 INFO L93 Difference]: Finished difference Result 278 states and 851 transitions. [2022-02-18 16:21:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:53,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:21:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:53,797 INFO L225 Difference]: With dead ends: 278 [2022-02-18 16:21:53,797 INFO L226 Difference]: Without dead ends: 263 [2022-02-18 16:21:53,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:21:53,799 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:53,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-18 16:21:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 132. [2022-02-18 16:21:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2022-02-18 16:21:53,815 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2022-02-18 16:21:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:53,815 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2022-02-18 16:21:53,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2022-02-18 16:21:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:21:53,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:53,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:53,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-18 16:21:53,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:53,818 INFO L85 PathProgramCache]: Analyzing trace with hash 332003462, now seen corresponding path program 3 times [2022-02-18 16:21:53,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:53,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127874212] [2022-02-18 16:21:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:53,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:54,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:54,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127874212] [2022-02-18 16:21:54,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127874212] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:54,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:54,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:54,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035574045] [2022-02-18 16:21:54,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:54,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:54,007 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:54,238 INFO L93 Difference]: Finished difference Result 363 states and 1192 transitions. [2022-02-18 16:21:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-18 16:21:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:21:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:54,242 INFO L225 Difference]: With dead ends: 363 [2022-02-18 16:21:54,243 INFO L226 Difference]: Without dead ends: 348 [2022-02-18 16:21:54,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-18 16:21:54,244 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:54,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 31 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-18 16:21:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 140. [2022-02-18 16:21:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-02-18 16:21:54,265 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-02-18 16:21:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:54,265 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-02-18 16:21:54,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-02-18 16:21:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:21:54,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:54,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:54,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-18 16:21:54,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash -198832182, now seen corresponding path program 4 times [2022-02-18 16:21:54,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:54,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304990343] [2022-02-18 16:21:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:54,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:54,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:54,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304990343] [2022-02-18 16:21:54,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304990343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:54,460 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:54,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:54,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574296607] [2022-02-18 16:21:54,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:54,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:54,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:54,462 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:54,628 INFO L93 Difference]: Finished difference Result 304 states and 944 transitions. [2022-02-18 16:21:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:21:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:54,630 INFO L225 Difference]: With dead ends: 304 [2022-02-18 16:21:54,630 INFO L226 Difference]: Without dead ends: 289 [2022-02-18 16:21:54,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:21:54,632 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:54,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-18 16:21:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 140. [2022-02-18 16:21:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-02-18 16:21:54,648 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-02-18 16:21:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:54,648 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-02-18 16:21:54,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-02-18 16:21:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:21:54,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:54,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:54,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-18 16:21:54,650 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1457604362, now seen corresponding path program 5 times [2022-02-18 16:21:54,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:54,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454613576] [2022-02-18 16:21:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:54,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:54,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:54,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454613576] [2022-02-18 16:21:54,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454613576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:54,804 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:54,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:54,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867937769] [2022-02-18 16:21:54,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:54,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:54,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:54,806 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:55,003 INFO L93 Difference]: Finished difference Result 371 states and 1217 transitions. [2022-02-18 16:21:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-18 16:21:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:21:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:55,006 INFO L225 Difference]: With dead ends: 371 [2022-02-18 16:21:55,006 INFO L226 Difference]: Without dead ends: 356 [2022-02-18 16:21:55,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-18 16:21:55,007 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:55,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 33 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-18 16:21:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 142. [2022-02-18 16:21:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-02-18 16:21:55,028 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-02-18 16:21:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:55,029 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-02-18 16:21:55,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-02-18 16:21:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:21:55,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:55,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:55,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-18 16:21:55,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1842890102, now seen corresponding path program 6 times [2022-02-18 16:21:55,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:55,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426535929] [2022-02-18 16:21:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:55,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:55,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426535929] [2022-02-18 16:21:55,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426535929] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:55,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:55,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:55,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375548581] [2022-02-18 16:21:55,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:55,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:55,170 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:55,336 INFO L93 Difference]: Finished difference Result 295 states and 918 transitions. [2022-02-18 16:21:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:55,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:21:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:55,339 INFO L225 Difference]: With dead ends: 295 [2022-02-18 16:21:55,339 INFO L226 Difference]: Without dead ends: 280 [2022-02-18 16:21:55,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:21:55,340 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:55,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-18 16:21:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 142. [2022-02-18 16:21:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-02-18 16:21:55,347 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-02-18 16:21:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:55,347 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-02-18 16:21:55,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-02-18 16:21:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:21:55,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:55,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:55,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-18 16:21:55,349 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:55,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1236732740, now seen corresponding path program 1 times [2022-02-18 16:21:55,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:55,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717460497] [2022-02-18 16:21:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:55,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:55,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:55,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717460497] [2022-02-18 16:21:55,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717460497] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:55,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:55,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:21:55,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622078129] [2022-02-18 16:21:55,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:55,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:21:55,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:55,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:21:55,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:21:55,368 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:55,396 INFO L93 Difference]: Finished difference Result 163 states and 538 transitions. [2022-02-18 16:21:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:21:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:21:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:55,398 INFO L225 Difference]: With dead ends: 163 [2022-02-18 16:21:55,398 INFO L226 Difference]: Without dead ends: 163 [2022-02-18 16:21:55,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:21:55,399 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:55,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:21:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-18 16:21:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-02-18 16:21:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.3209876543209877) internal successors, (538), 162 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 538 transitions. [2022-02-18 16:21:55,405 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 538 transitions. Word has length 15 [2022-02-18 16:21:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:55,405 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 538 transitions. [2022-02-18 16:21:55,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 538 transitions. [2022-02-18 16:21:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:21:55,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:55,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:55,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-18 16:21:55,406 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:55,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1228810757, now seen corresponding path program 1 times [2022-02-18 16:21:55,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:55,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395062390] [2022-02-18 16:21:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:55,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:55,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:55,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395062390] [2022-02-18 16:21:55,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395062390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:55,422 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:55,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:21:55,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816613497] [2022-02-18 16:21:55,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:55,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:21:55,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:21:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:21:55,423 INFO L87 Difference]: Start difference. First operand 163 states and 538 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:55,452 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2022-02-18 16:21:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:21:55,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:21:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:55,454 INFO L225 Difference]: With dead ends: 192 [2022-02-18 16:21:55,454 INFO L226 Difference]: Without dead ends: 192 [2022-02-18 16:21:55,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:21:55,455 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:55,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:21:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-18 16:21:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-02-18 16:21:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2022-02-18 16:21:55,462 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2022-02-18 16:21:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:55,462 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2022-02-18 16:21:55,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2022-02-18 16:21:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:21:55,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:55,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:55,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-18 16:21:55,463 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1075245774, now seen corresponding path program 1 times [2022-02-18 16:21:55,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:55,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923835695] [2022-02-18 16:21:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:55,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:55,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:55,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923835695] [2022-02-18 16:21:55,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923835695] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:55,481 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:55,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:21:55,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865256646] [2022-02-18 16:21:55,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:55,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:21:55,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:55,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:21:55,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:21:55,482 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:55,510 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2022-02-18 16:21:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:21:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:21:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:55,512 INFO L225 Difference]: With dead ends: 223 [2022-02-18 16:21:55,512 INFO L226 Difference]: Without dead ends: 223 [2022-02-18 16:21:55,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:21:55,513 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:55,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:21:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-18 16:21:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-02-18 16:21:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2022-02-18 16:21:55,520 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2022-02-18 16:21:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:55,520 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2022-02-18 16:21:55,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2022-02-18 16:21:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:55,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:55,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:55,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-18 16:21:55,522 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash -8420014, now seen corresponding path program 1 times [2022-02-18 16:21:55,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:55,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361018663] [2022-02-18 16:21:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:55,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:21:55,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:55,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361018663] [2022-02-18 16:21:55,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361018663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:55,561 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:55,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:55,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318275517] [2022-02-18 16:21:55,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:55,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:55,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:55,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:55,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:55,562 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:55,668 INFO L93 Difference]: Finished difference Result 571 states and 1745 transitions. [2022-02-18 16:21:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-18 16:21:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:21:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:55,672 INFO L225 Difference]: With dead ends: 571 [2022-02-18 16:21:55,672 INFO L226 Difference]: Without dead ends: 495 [2022-02-18 16:21:55,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:21:55,673 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:55,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 30 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-18 16:21:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2022-02-18 16:21:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2672413793103448) internal successors, (758), 232 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 758 transitions. [2022-02-18 16:21:55,683 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 758 transitions. Word has length 16 [2022-02-18 16:21:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:55,685 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 758 transitions. [2022-02-18 16:21:55,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 758 transitions. [2022-02-18 16:21:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:55,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:55,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:55,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-18 16:21:55,686 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash 245083442, now seen corresponding path program 1 times [2022-02-18 16:21:55,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:55,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589478436] [2022-02-18 16:21:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:21:55,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:55,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589478436] [2022-02-18 16:21:55,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589478436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:55,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:55,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:21:55,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462389801] [2022-02-18 16:21:55,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:55,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:21:55,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:21:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:21:55,732 INFO L87 Difference]: Start difference. First operand 233 states and 758 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:55,773 INFO L93 Difference]: Finished difference Result 374 states and 1132 transitions. [2022-02-18 16:21:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:21:55,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:21:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:55,775 INFO L225 Difference]: With dead ends: 374 [2022-02-18 16:21:55,775 INFO L226 Difference]: Without dead ends: 287 [2022-02-18 16:21:55,775 INFO L932 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 [2022-02-18 16:21:55,776 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:55,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 18 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:21:55,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-18 16:21:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 232. [2022-02-18 16:21:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.272727272727273) internal successors, (756), 231 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 756 transitions. [2022-02-18 16:21:55,784 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 756 transitions. Word has length 16 [2022-02-18 16:21:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:55,784 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 756 transitions. [2022-02-18 16:21:55,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 756 transitions. [2022-02-18 16:21:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:55,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:55,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:55,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-18 16:21:55,786 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash 94528582, now seen corresponding path program 1 times [2022-02-18 16:21:55,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:55,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103228275] [2022-02-18 16:21:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:55,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:55,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:55,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103228275] [2022-02-18 16:21:55,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103228275] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:21:55,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881589122] [2022-02-18 16:21:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:55,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:21:55,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:21:55,851 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) [2022-02-18 16:21:55,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-18 16:21:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:55,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:21:55,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:21:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:56,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:21:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:56,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881589122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:21:56,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:21:56,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-18 16:21:56,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353978474] [2022-02-18 16:21:56,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:21:56,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-18 16:21:56,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:56,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-18 16:21:56,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-18 16:21:56,566 INFO L87 Difference]: Start difference. First operand 232 states and 756 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:56,682 INFO L93 Difference]: Finished difference Result 376 states and 1097 transitions. [2022-02-18 16:21:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:56,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:21:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:56,685 INFO L225 Difference]: With dead ends: 376 [2022-02-18 16:21:56,685 INFO L226 Difference]: Without dead ends: 334 [2022-02-18 16:21:56,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-18 16:21:56,686 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:56,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 43 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:56,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-18 16:21:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 232. [2022-02-18 16:21:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.2337662337662336) internal successors, (747), 231 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 747 transitions. [2022-02-18 16:21:56,694 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 747 transitions. Word has length 16 [2022-02-18 16:21:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:56,694 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 747 transitions. [2022-02-18 16:21:56,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 747 transitions. [2022-02-18 16:21:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:56,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:56,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:56,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-18 16:21:56,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-18 16:21:56,918 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1220129482, now seen corresponding path program 2 times [2022-02-18 16:21:56,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:56,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865396406] [2022-02-18 16:21:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:56,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:56,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:56,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865396406] [2022-02-18 16:21:56,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865396406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:21:56,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893367180] [2022-02-18 16:21:56,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:21:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:21:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:21:56,956 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) [2022-02-18 16:21:56,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-18 16:21:56,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:21:56,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:21:56,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:21:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:21:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:57,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:21:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:57,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893367180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:21:57,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:21:57,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-18 16:21:57,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737341266] [2022-02-18 16:21:57,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:21:57,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-18 16:21:57,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:57,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-18 16:21:57,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-18 16:21:57,468 INFO L87 Difference]: Start difference. First operand 232 states and 747 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:57,689 INFO L93 Difference]: Finished difference Result 556 states and 1605 transitions. [2022-02-18 16:21:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-18 16:21:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:21:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:57,693 INFO L225 Difference]: With dead ends: 556 [2022-02-18 16:21:57,693 INFO L226 Difference]: Without dead ends: 523 [2022-02-18 16:21:57,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-02-18 16:21:57,693 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:57,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 90 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:21:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-18 16:21:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 244. [2022-02-18 16:21:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.2181069958847734) internal successors, (782), 243 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 782 transitions. [2022-02-18 16:21:57,704 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 782 transitions. Word has length 16 [2022-02-18 16:21:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:57,704 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 782 transitions. [2022-02-18 16:21:57,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 782 transitions. [2022-02-18 16:21:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:57,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:57,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:57,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-18 16:21:57,919 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,SelfDestructingSolverStorable12 [2022-02-18 16:21:57,920 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:57,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:57,920 INFO L85 PathProgramCache]: Analyzing trace with hash -757483642, now seen corresponding path program 3 times [2022-02-18 16:21:57,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:57,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941924075] [2022-02-18 16:21:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:21:57,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:57,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941924075] [2022-02-18 16:21:57,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941924075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:57,968 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:57,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:57,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107419317] [2022-02-18 16:21:57,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:57,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:57,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:57,972 INFO L87 Difference]: Start difference. First operand 244 states and 782 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:58,076 INFO L93 Difference]: Finished difference Result 522 states and 1513 transitions. [2022-02-18 16:21:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-18 16:21:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:21:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:58,080 INFO L225 Difference]: With dead ends: 522 [2022-02-18 16:21:58,080 INFO L226 Difference]: Without dead ends: 495 [2022-02-18 16:21:58,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:21:58,081 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:58,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 27 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-18 16:21:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 244. [2022-02-18 16:21:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.2098765432098766) internal successors, (780), 243 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 780 transitions. [2022-02-18 16:21:58,091 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 780 transitions. Word has length 16 [2022-02-18 16:21:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:58,091 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 780 transitions. [2022-02-18 16:21:58,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 780 transitions. [2022-02-18 16:21:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:58,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:58,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:58,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-18 16:21:58,093 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash -472042042, now seen corresponding path program 2 times [2022-02-18 16:21:58,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:58,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543278046] [2022-02-18 16:21:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:58,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:21:58,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:58,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543278046] [2022-02-18 16:21:58,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543278046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:58,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:58,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:58,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771393845] [2022-02-18 16:21:58,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:58,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:58,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:58,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:58,159 INFO L87 Difference]: Start difference. First operand 244 states and 780 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:58,231 INFO L93 Difference]: Finished difference Result 406 states and 1177 transitions. [2022-02-18 16:21:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:21:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:58,234 INFO L225 Difference]: With dead ends: 406 [2022-02-18 16:21:58,234 INFO L226 Difference]: Without dead ends: 369 [2022-02-18 16:21:58,235 INFO L932 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 [2022-02-18 16:21:58,236 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:58,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 31 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-02-18 16:21:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 244. [2022-02-18 16:21:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.2016460905349793) internal successors, (778), 243 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 778 transitions. [2022-02-18 16:21:58,245 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 778 transitions. Word has length 16 [2022-02-18 16:21:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:58,246 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 778 transitions. [2022-02-18 16:21:58,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 778 transitions. [2022-02-18 16:21:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:58,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:58,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:58,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-18 16:21:58,247 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1777677254, now seen corresponding path program 4 times [2022-02-18 16:21:58,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:58,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787463958] [2022-02-18 16:21:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:58,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:58,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787463958] [2022-02-18 16:21:58,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787463958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:21:58,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145232261] [2022-02-18 16:21:58,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:21:58,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:21:58,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:21:58,303 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) [2022-02-18 16:21:58,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-18 16:21:58,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:21:58,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:21:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:21:58,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:21:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:58,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:21:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:58,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145232261] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:21:58,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:21:58,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-02-18 16:21:58,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540155103] [2022-02-18 16:21:58,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:21:58,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-18 16:21:58,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-18 16:21:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-18 16:21:58,779 INFO L87 Difference]: Start difference. First operand 244 states and 778 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2022-02-18 16:21:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:58,901 INFO L93 Difference]: Finished difference Result 392 states and 1127 transitions. [2022-02-18 16:21:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:58,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 16 [2022-02-18 16:21:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:58,903 INFO L225 Difference]: With dead ends: 392 [2022-02-18 16:21:58,904 INFO L226 Difference]: Without dead ends: 346 [2022-02-18 16:21:58,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-18 16:21:58,904 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:58,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 50 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-18 16:21:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 240. [2022-02-18 16:21:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.213389121338912) internal successors, (768), 239 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 768 transitions. [2022-02-18 16:21:58,913 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 768 transitions. Word has length 16 [2022-02-18 16:21:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:58,914 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 768 transitions. [2022-02-18 16:21:58,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2022-02-18 16:21:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 768 transitions. [2022-02-18 16:21:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:58,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:58,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:58,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-18 16:21:59,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:21:59,135 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:59,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1203369498, now seen corresponding path program 2 times [2022-02-18 16:21:59,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:59,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922681864] [2022-02-18 16:21:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:59,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:21:59,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:59,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922681864] [2022-02-18 16:21:59,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922681864] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:59,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:59,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:59,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725795532] [2022-02-18 16:21:59,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:59,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:59,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:59,166 INFO L87 Difference]: Start difference. First operand 240 states and 768 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:59,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:59,250 INFO L93 Difference]: Finished difference Result 405 states and 1178 transitions. [2022-02-18 16:21:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:59,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:21:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:59,254 INFO L225 Difference]: With dead ends: 405 [2022-02-18 16:21:59,254 INFO L226 Difference]: Without dead ends: 323 [2022-02-18 16:21:59,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:21:59,255 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:59,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 37 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-18 16:21:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 211. [2022-02-18 16:21:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1714285714285713) internal successors, (666), 210 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 666 transitions. [2022-02-18 16:21:59,262 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 666 transitions. Word has length 16 [2022-02-18 16:21:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:59,263 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 666 transitions. [2022-02-18 16:21:59,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 666 transitions. [2022-02-18 16:21:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:59,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:59,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:59,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-18 16:21:59,264 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1386777334, now seen corresponding path program 5 times [2022-02-18 16:21:59,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:59,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415758182] [2022-02-18 16:21:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:59,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:21:59,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:59,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415758182] [2022-02-18 16:21:59,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415758182] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:21:59,316 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:21:59,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:21:59,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818500728] [2022-02-18 16:21:59,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:21:59,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:21:59,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:21:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:21:59,318 INFO L87 Difference]: Start difference. First operand 211 states and 666 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:21:59,427 INFO L93 Difference]: Finished difference Result 346 states and 975 transitions. [2022-02-18 16:21:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:21:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:21:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:21:59,430 INFO L225 Difference]: With dead ends: 346 [2022-02-18 16:21:59,430 INFO L226 Difference]: Without dead ends: 319 [2022-02-18 16:21:59,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:21:59,431 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:21:59,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:21:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-02-18 16:21:59,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 211. [2022-02-18 16:21:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1619047619047618) internal successors, (664), 210 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 664 transitions. [2022-02-18 16:21:59,447 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 664 transitions. Word has length 16 [2022-02-18 16:21:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:21:59,447 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 664 transitions. [2022-02-18 16:21:59,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:21:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 664 transitions. [2022-02-18 16:21:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:21:59,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:21:59,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:21:59,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-18 16:21:59,448 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:21:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:21:59,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1279296454, now seen corresponding path program 6 times [2022-02-18 16:21:59,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:21:59,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395890014] [2022-02-18 16:21:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:21:59,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:21:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:21:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:59,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:21:59,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395890014] [2022-02-18 16:21:59,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395890014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:21:59,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548103687] [2022-02-18 16:21:59,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:21:59,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:21:59,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:21:59,497 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) [2022-02-18 16:21:59,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-18 16:21:59,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:21:59,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:21:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:21:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:21:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:59,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:21:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:21:59,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548103687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:21:59,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:21:59,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-02-18 16:21:59,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291178770] [2022-02-18 16:21:59,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:21:59,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-18 16:21:59,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:21:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-18 16:21:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-18 16:21:59,956 INFO L87 Difference]: Start difference. First operand 211 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2022-02-18 16:22:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:00,246 INFO L93 Difference]: Finished difference Result 550 states and 1584 transitions. [2022-02-18 16:22:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 16:22:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 16 [2022-02-18 16:22:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:00,249 INFO L225 Difference]: With dead ends: 550 [2022-02-18 16:22:00,250 INFO L226 Difference]: Without dead ends: 517 [2022-02-18 16:22:00,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-02-18 16:22:00,250 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:00,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 87 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:22:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-02-18 16:22:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 211. [2022-02-18 16:22:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1523809523809523) internal successors, (662), 210 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 662 transitions. [2022-02-18 16:22:00,260 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 662 transitions. Word has length 16 [2022-02-18 16:22:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:00,261 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 662 transitions. [2022-02-18 16:22:00,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2022-02-18 16:22:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 662 transitions. [2022-02-18 16:22:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:22:00,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:00,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:00,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-18 16:22:00,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:22:00,475 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash 402212618, now seen corresponding path program 3 times [2022-02-18 16:22:00,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:00,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105494395] [2022-02-18 16:22:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:22:00,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:00,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105494395] [2022-02-18 16:22:00,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105494395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:22:00,512 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:22:00,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:22:00,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130201904] [2022-02-18 16:22:00,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:22:00,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:22:00,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:22:00,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:22:00,514 INFO L87 Difference]: Start difference. First operand 211 states and 662 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:00,602 INFO L93 Difference]: Finished difference Result 340 states and 952 transitions. [2022-02-18 16:22:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:22:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:22:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:00,604 INFO L225 Difference]: With dead ends: 340 [2022-02-18 16:22:00,604 INFO L226 Difference]: Without dead ends: 303 [2022-02-18 16:22:00,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:22:00,605 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:00,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:22:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-18 16:22:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 203. [2022-02-18 16:22:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.118811881188119) internal successors, (630), 202 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 630 transitions. [2022-02-18 16:22:00,615 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 630 transitions. Word has length 16 [2022-02-18 16:22:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:00,615 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 630 transitions. [2022-02-18 16:22:00,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 630 transitions. [2022-02-18 16:22:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:22:00,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:00,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:00,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-18 16:22:00,617 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 95102794, now seen corresponding path program 4 times [2022-02-18 16:22:00,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:00,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470221509] [2022-02-18 16:22:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:00,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:22:00,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:00,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470221509] [2022-02-18 16:22:00,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470221509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:22:00,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:22:00,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:22:00,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624369579] [2022-02-18 16:22:00,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:22:00,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:22:00,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:00,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:22:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:22:00,639 INFO L87 Difference]: Start difference. First operand 203 states and 630 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:00,681 INFO L93 Difference]: Finished difference Result 240 states and 711 transitions. [2022-02-18 16:22:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:22:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:22:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:00,682 INFO L225 Difference]: With dead ends: 240 [2022-02-18 16:22:00,682 INFO L226 Difference]: Without dead ends: 199 [2022-02-18 16:22:00,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:22:00,683 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:00,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:22:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-18 16:22:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2022-02-18 16:22:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.126315789473684) internal successors, (594), 190 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 594 transitions. [2022-02-18 16:22:00,689 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 594 transitions. Word has length 16 [2022-02-18 16:22:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:00,689 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 594 transitions. [2022-02-18 16:22:00,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 594 transitions. [2022-02-18 16:22:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:22:00,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:00,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:00,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-18 16:22:00,692 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2006444646, now seen corresponding path program 1 times [2022-02-18 16:22:00,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:00,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517415559] [2022-02-18 16:22:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:00,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:22:00,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:00,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517415559] [2022-02-18 16:22:00,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517415559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:22:00,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:22:00,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:22:00,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423583287] [2022-02-18 16:22:00,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:22:00,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:22:00,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:22:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:22:00,714 INFO L87 Difference]: Start difference. First operand 191 states and 594 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:00,748 INFO L93 Difference]: Finished difference Result 281 states and 830 transitions. [2022-02-18 16:22:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:22:00,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-18 16:22:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:00,750 INFO L225 Difference]: With dead ends: 281 [2022-02-18 16:22:00,750 INFO L226 Difference]: Without dead ends: 281 [2022-02-18 16:22:00,750 INFO L932 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 [2022-02-18 16:22:00,751 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:00,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 16 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:22:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-18 16:22:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 228. [2022-02-18 16:22:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.101321585903084) internal successors, (704), 227 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 704 transitions. [2022-02-18 16:22:00,757 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 704 transitions. Word has length 18 [2022-02-18 16:22:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 704 transitions. [2022-02-18 16:22:00,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 704 transitions. [2022-02-18 16:22:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:22:00,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:00,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:00,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-18 16:22:00,759 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash -682940534, now seen corresponding path program 1 times [2022-02-18 16:22:00,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:00,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583849251] [2022-02-18 16:22:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:22:00,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:00,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583849251] [2022-02-18 16:22:00,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583849251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:22:00,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:22:00,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:22:00,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225333473] [2022-02-18 16:22:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:22:00,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:22:00,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:22:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:22:00,779 INFO L87 Difference]: Start difference. First operand 228 states and 704 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:00,816 INFO L93 Difference]: Finished difference Result 295 states and 875 transitions. [2022-02-18 16:22:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:22:00,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-18 16:22:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:00,818 INFO L225 Difference]: With dead ends: 295 [2022-02-18 16:22:00,818 INFO L226 Difference]: Without dead ends: 295 [2022-02-18 16:22:00,818 INFO L932 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 [2022-02-18 16:22:00,819 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:00,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 13 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:22:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-18 16:22:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 248. [2022-02-18 16:22:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0931174089068825) internal successors, (764), 247 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 764 transitions. [2022-02-18 16:22:00,826 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 764 transitions. Word has length 18 [2022-02-18 16:22:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:00,826 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 764 transitions. [2022-02-18 16:22:00,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 764 transitions. [2022-02-18 16:22:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:22:00,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:00,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:00,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-18 16:22:00,828 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash -541954778, now seen corresponding path program 2 times [2022-02-18 16:22:00,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:00,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998853676] [2022-02-18 16:22:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:22:00,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:00,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998853676] [2022-02-18 16:22:00,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998853676] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:22:00,870 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:22:00,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:22:00,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268549479] [2022-02-18 16:22:00,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:22:00,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:22:00,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:22:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:22:00,871 INFO L87 Difference]: Start difference. First operand 248 states and 764 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:00,905 INFO L93 Difference]: Finished difference Result 256 states and 763 transitions. [2022-02-18 16:22:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:22:00,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-18 16:22:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:00,907 INFO L225 Difference]: With dead ends: 256 [2022-02-18 16:22:00,907 INFO L226 Difference]: Without dead ends: 256 [2022-02-18 16:22:00,907 INFO L932 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 [2022-02-18 16:22:00,908 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:00,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:22:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-18 16:22:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 211. [2022-02-18 16:22:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.0142857142857142) internal successors, (633), 210 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 633 transitions. [2022-02-18 16:22:00,914 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 633 transitions. Word has length 18 [2022-02-18 16:22:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:00,914 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 633 transitions. [2022-02-18 16:22:00,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 633 transitions. [2022-02-18 16:22:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:22:00,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:00,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:00,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-18 16:22:00,915 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1106366634, now seen corresponding path program 3 times [2022-02-18 16:22:00,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:00,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736192107] [2022-02-18 16:22:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:00,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:22:00,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:00,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736192107] [2022-02-18 16:22:00,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736192107] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:22:00,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:22:00,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:22:00,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676453354] [2022-02-18 16:22:00,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:22:00,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:22:00,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:00,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:22:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:22:00,938 INFO L87 Difference]: Start difference. First operand 211 states and 633 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:00,960 INFO L93 Difference]: Finished difference Result 219 states and 645 transitions. [2022-02-18 16:22:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:22:00,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-18 16:22:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:00,961 INFO L225 Difference]: With dead ends: 219 [2022-02-18 16:22:00,961 INFO L226 Difference]: Without dead ends: 209 [2022-02-18 16:22:00,962 INFO L932 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 [2022-02-18 16:22:00,962 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:00,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:22:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-18 16:22:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-02-18 16:22:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 3.0240384615384617) internal successors, (629), 208 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 629 transitions. [2022-02-18 16:22:00,971 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 629 transitions. Word has length 18 [2022-02-18 16:22:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:00,972 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 629 transitions. [2022-02-18 16:22:00,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 629 transitions. [2022-02-18 16:22:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:22:00,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:00,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:00,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-18 16:22:00,973 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash -325336954, now seen corresponding path program 2 times [2022-02-18 16:22:00,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:00,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287569717] [2022-02-18 16:22:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:00,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:22:00,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:00,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287569717] [2022-02-18 16:22:00,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287569717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:22:00,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:22:00,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:22:00,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783739218] [2022-02-18 16:22:00,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:22:00,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:22:00,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:22:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:22:01,003 INFO L87 Difference]: Start difference. First operand 209 states and 629 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:01,028 INFO L93 Difference]: Finished difference Result 209 states and 609 transitions. [2022-02-18 16:22:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:22:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-18 16:22:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:01,030 INFO L225 Difference]: With dead ends: 209 [2022-02-18 16:22:01,030 INFO L226 Difference]: Without dead ends: 209 [2022-02-18 16:22:01,030 INFO L932 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 [2022-02-18 16:22:01,031 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:01,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:22:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-18 16:22:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 189. [2022-02-18 16:22:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-02-18 16:22:01,038 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 18 [2022-02-18 16:22:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:01,038 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-02-18 16:22:01,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-02-18 16:22:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:22:01,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:01,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:01,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-18 16:22:01,039 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1843106918, now seen corresponding path program 1 times [2022-02-18 16:22:01,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:01,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932284300] [2022-02-18 16:22:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:01,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:01,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932284300] [2022-02-18 16:22:01,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932284300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:22:01,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993480423] [2022-02-18 16:22:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:01,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:22:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:22:01,436 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) [2022-02-18 16:22:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-18 16:22:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:22:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:22:02,212 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 328 treesize of output 280 [2022-02-18 16:22:03,046 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 236 treesize of output 202 [2022-02-18 16:22:03,052 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 206 treesize of output 182 [2022-02-18 16:22:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:03,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:22:08,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:08,178 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 331 treesize of output 303 [2022-02-18 16:22:10,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:10,336 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 236 treesize of output 212 [2022-02-18 16:22:10,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:10,354 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 208 treesize of output 192 [2022-02-18 16:22:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:10,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993480423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:22:10,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:22:10,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:22:10,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988213354] [2022-02-18 16:22:10,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:22:10,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:22:10,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:10,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:22:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:22:10,879 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:25,489 INFO L93 Difference]: Finished difference Result 1658 states and 4669 transitions. [2022-02-18 16:22:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-18 16:22:25,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:22:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:25,497 INFO L225 Difference]: With dead ends: 1658 [2022-02-18 16:22:25,497 INFO L226 Difference]: Without dead ends: 1508 [2022-02-18 16:22:25,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1427, Invalid=5545, Unknown=0, NotChecked=0, Total=6972 [2022-02-18 16:22:25,499 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 448 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:25,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 512 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-18 16:22:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2022-02-18 16:22:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 304. [2022-02-18 16:22:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.2046204620462047) internal successors, (971), 303 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 971 transitions. [2022-02-18 16:22:25,517 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 971 transitions. Word has length 20 [2022-02-18 16:22:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:25,517 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 971 transitions. [2022-02-18 16:22:25,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 971 transitions. [2022-02-18 16:22:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:22:25,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:25,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:25,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-18 16:22:25,741 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,SelfDestructingSolverStorable26 [2022-02-18 16:22:25,741 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1724935778, now seen corresponding path program 2 times [2022-02-18 16:22:25,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:25,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520866023] [2022-02-18 16:22:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:25,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:26,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:26,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520866023] [2022-02-18 16:22:26,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520866023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:22:26,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257828161] [2022-02-18 16:22:26,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:22:26,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:22:26,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:22:26,147 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) [2022-02-18 16:22:26,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-18 16:22:26,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:22:26,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:22:26,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:22:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:22:26,957 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 375 treesize of output 307 [2022-02-18 16:22:27,873 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 210 treesize of output 186 [2022-02-18 16:22:27,877 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 203 treesize of output 177 [2022-02-18 16:22:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:28,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:22:31,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:31,314 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 330 treesize of output 298 [2022-02-18 16:22:32,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:32,259 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 195 treesize of output 179 [2022-02-18 16:22:32,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:32,270 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 175 treesize of output 163 [2022-02-18 16:22:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:32,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257828161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:22:32,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:22:32,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:22:32,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395624384] [2022-02-18 16:22:32,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:22:32,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:22:32,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:22:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:22:32,619 INFO L87 Difference]: Start difference. First operand 304 states and 971 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:42,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:42,244 INFO L93 Difference]: Finished difference Result 1651 states and 4641 transitions. [2022-02-18 16:22:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-18 16:22:42,245 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:22:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:42,253 INFO L225 Difference]: With dead ends: 1651 [2022-02-18 16:22:42,254 INFO L226 Difference]: Without dead ends: 1516 [2022-02-18 16:22:42,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=962, Invalid=3868, Unknown=0, NotChecked=0, Total=4830 [2022-02-18 16:22:42,255 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 526 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:42,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 492 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 16:22:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-02-18 16:22:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 324. [2022-02-18 16:22:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.2476780185758516) internal successors, (1049), 323 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1049 transitions. [2022-02-18 16:22:42,272 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1049 transitions. Word has length 20 [2022-02-18 16:22:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:42,273 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1049 transitions. [2022-02-18 16:22:42,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1049 transitions. [2022-02-18 16:22:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:22:42,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:42,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:42,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-18 16:22:42,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-18 16:22:42,488 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -370004968, now seen corresponding path program 3 times [2022-02-18 16:22:42,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:42,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012740573] [2022-02-18 16:22:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:42,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:42,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:42,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012740573] [2022-02-18 16:22:42,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012740573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:22:42,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728892580] [2022-02-18 16:22:42,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:22:42,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:22:42,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:22:42,810 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) [2022-02-18 16:22:42,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-18 16:22:42,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:22:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:22:42,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:22:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:22:43,370 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 276 treesize of output 236 [2022-02-18 16:22:43,817 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 224 treesize of output 194 [2022-02-18 16:22:43,827 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 181 treesize of output 161 [2022-02-18 16:22:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:44,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:22:45,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:45,856 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 183 treesize of output 171 [2022-02-18 16:22:46,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:46,650 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 331 treesize of output 297 [2022-02-18 16:22:46,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:46,665 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 293 treesize of output 259 [2022-02-18 16:22:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:46,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728892580] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:22:46,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:22:46,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:22:46,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963899681] [2022-02-18 16:22:46,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:22:46,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:22:46,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:22:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:22:46,946 INFO L87 Difference]: Start difference. First operand 324 states and 1049 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:48,225 INFO L93 Difference]: Finished difference Result 634 states and 1911 transitions. [2022-02-18 16:22:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:22:48,226 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:22:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:48,228 INFO L225 Difference]: With dead ends: 634 [2022-02-18 16:22:48,228 INFO L226 Difference]: Without dead ends: 619 [2022-02-18 16:22:48,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 16:22:48,229 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:48,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 295 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:22:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-18 16:22:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 324. [2022-02-18 16:22:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.2476780185758516) internal successors, (1049), 323 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1049 transitions. [2022-02-18 16:22:48,239 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1049 transitions. Word has length 20 [2022-02-18 16:22:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:48,239 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1049 transitions. [2022-02-18 16:22:48,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1049 transitions. [2022-02-18 16:22:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:22:48,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:48,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:48,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-18 16:22:48,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:22:48,455 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash -734459776, now seen corresponding path program 4 times [2022-02-18 16:22:48,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:48,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507908042] [2022-02-18 16:22:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:48,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:48,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:48,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507908042] [2022-02-18 16:22:48,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507908042] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:22:48,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388498556] [2022-02-18 16:22:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:22:48,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:22:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:22:48,764 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) [2022-02-18 16:22:48,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-18 16:22:48,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:22:48,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:22:48,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:22:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:22:49,392 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 270 treesize of output 232 [2022-02-18 16:22:50,030 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 337 treesize of output 297 [2022-02-18 16:22:50,034 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 314 treesize of output 264 [2022-02-18 16:22:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:50,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:22:54,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:54,141 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 384 treesize of output 364 [2022-02-18 16:22:55,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:55,347 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 217 treesize of output 199 [2022-02-18 16:22:55,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:22:55,356 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 195 treesize of output 181 [2022-02-18 16:22:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:55,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388498556] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:22:55,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:22:55,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:22:55,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776765627] [2022-02-18 16:22:55,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:22:55,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:22:55,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:22:55,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:22:55,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:22:55,642 INFO L87 Difference]: Start difference. First operand 324 states and 1049 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:22:56,531 INFO L93 Difference]: Finished difference Result 551 states and 1679 transitions. [2022-02-18 16:22:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 16:22:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:22:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:22:56,534 INFO L225 Difference]: With dead ends: 551 [2022-02-18 16:22:56,534 INFO L226 Difference]: Without dead ends: 536 [2022-02-18 16:22:56,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-02-18 16:22:56,535 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:22:56,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 203 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:22:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-02-18 16:22:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 326. [2022-02-18 16:22:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.2553846153846155) internal successors, (1058), 325 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1058 transitions. [2022-02-18 16:22:56,544 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1058 transitions. Word has length 20 [2022-02-18 16:22:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:22:56,544 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1058 transitions. [2022-02-18 16:22:56,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:22:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1058 transitions. [2022-02-18 16:22:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:22:56,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:22:56,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:22:56,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-18 16:22:56,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:22:56,768 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:22:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:22:56,768 INFO L85 PathProgramCache]: Analyzing trace with hash 760143188, now seen corresponding path program 5 times [2022-02-18 16:22:56,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:22:56,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554036029] [2022-02-18 16:22:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:22:56,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:22:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:22:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:57,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:22:57,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554036029] [2022-02-18 16:22:57,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554036029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:22:57,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820521899] [2022-02-18 16:22:57,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:22:57,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:22:57,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:22:57,070 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) [2022-02-18 16:22:57,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-18 16:22:57,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:22:57,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:22:57,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:22:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:22:57,886 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 364 treesize of output 298 [2022-02-18 16:22:58,725 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 337 treesize of output 293 [2022-02-18 16:22:58,729 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 297 treesize of output 251 [2022-02-18 16:22:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:22:59,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:23:02,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:02,030 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 532 treesize of output 496 [2022-02-18 16:23:03,843 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:23:03,844 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 233 treesize of output 204 [2022-02-18 16:23:03,849 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 205 treesize of output 177 [2022-02-18 16:23:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:04,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820521899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:23:04,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:23:04,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:23:04,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280719593] [2022-02-18 16:23:04,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:23:04,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:23:04,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:23:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:23:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:23:04,061 INFO L87 Difference]: Start difference. First operand 326 states and 1058 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:23:08,135 INFO L93 Difference]: Finished difference Result 1137 states and 3333 transitions. [2022-02-18 16:23:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-18 16:23:08,135 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:23:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:23:08,139 INFO L225 Difference]: With dead ends: 1137 [2022-02-18 16:23:08,139 INFO L226 Difference]: Without dead ends: 1062 [2022-02-18 16:23:08,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=480, Invalid=2600, Unknown=0, NotChecked=0, Total=3080 [2022-02-18 16:23:08,140 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 322 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:23:08,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 403 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:23:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-02-18 16:23:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 365. [2022-02-18 16:23:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.2252747252747254) internal successors, (1174), 364 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1174 transitions. [2022-02-18 16:23:08,152 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1174 transitions. Word has length 20 [2022-02-18 16:23:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:23:08,152 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 1174 transitions. [2022-02-18 16:23:08,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1174 transitions. [2022-02-18 16:23:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:23:08,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:23:08,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:23:08,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-18 16:23:08,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:23:08,367 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:23:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:23:08,368 INFO L85 PathProgramCache]: Analyzing trace with hash -381320286, now seen corresponding path program 6 times [2022-02-18 16:23:08,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:23:08,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988103779] [2022-02-18 16:23:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:23:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:23:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:23:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:08,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:23:08,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988103779] [2022-02-18 16:23:08,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988103779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:23:08,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906105853] [2022-02-18 16:23:08,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:23:08,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:23:08,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:23:08,736 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) [2022-02-18 16:23:08,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-18 16:23:08,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:23:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:23:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:23:08,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:23:09,509 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 307 treesize of output 259 [2022-02-18 16:23:10,031 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 241 treesize of output 213 [2022-02-18 16:23:10,035 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 230 treesize of output 198 [2022-02-18 16:23:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:10,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:23:12,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:12,479 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 292 treesize of output 270 [2022-02-18 16:23:13,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:13,450 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 261 treesize of output 237 [2022-02-18 16:23:13,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:13,460 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 233 treesize of output 213 [2022-02-18 16:23:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:13,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906105853] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:23:13,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:23:13,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:23:13,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247781446] [2022-02-18 16:23:13,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:23:13,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:23:13,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:23:13,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:23:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:23:13,853 INFO L87 Difference]: Start difference. First operand 365 states and 1174 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:23:22,336 INFO L93 Difference]: Finished difference Result 1795 states and 5075 transitions. [2022-02-18 16:23:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-18 16:23:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:23:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:23:22,342 INFO L225 Difference]: With dead ends: 1795 [2022-02-18 16:23:22,342 INFO L226 Difference]: Without dead ends: 1660 [2022-02-18 16:23:22,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1203, Invalid=5603, Unknown=0, NotChecked=0, Total=6806 [2022-02-18 16:23:22,344 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 368 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:23:22,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 538 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 16:23:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2022-02-18 16:23:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 388. [2022-02-18 16:23:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.297157622739018) internal successors, (1276), 387 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1276 transitions. [2022-02-18 16:23:22,361 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1276 transitions. Word has length 20 [2022-02-18 16:23:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:23:22,361 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1276 transitions. [2022-02-18 16:23:22,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1276 transitions. [2022-02-18 16:23:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:23:22,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:23:22,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:23:22,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-18 16:23:22,586 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,SelfDestructingSolverStorable31 [2022-02-18 16:23:22,587 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:23:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:23:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1801218380, now seen corresponding path program 7 times [2022-02-18 16:23:22,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:23:22,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486562253] [2022-02-18 16:23:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:23:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:23:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:23:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:22,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:23:22,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486562253] [2022-02-18 16:23:22,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486562253] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:23:22,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506403826] [2022-02-18 16:23:22,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:23:22,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:23:22,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:23:22,912 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) [2022-02-18 16:23:22,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-18 16:23:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:23:22,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:23:22,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:23:23,513 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 224 treesize of output 194 [2022-02-18 16:23:23,964 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 269 treesize of output 237 [2022-02-18 16:23:23,967 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 241 treesize of output 207 [2022-02-18 16:23:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:24,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:23:28,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:28,714 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 556 treesize of output 522 [2022-02-18 16:23:33,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:33,784 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 376 treesize of output 330 [2022-02-18 16:23:33,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:33,795 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 326 treesize of output 292 [2022-02-18 16:23:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:34,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506403826] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:23:34,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:23:34,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:23:34,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183467759] [2022-02-18 16:23:34,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:23:34,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:23:34,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:23:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:23:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:23:34,201 INFO L87 Difference]: Start difference. First operand 388 states and 1276 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:23:44,676 INFO L93 Difference]: Finished difference Result 1667 states and 4852 transitions. [2022-02-18 16:23:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-18 16:23:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:23:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:23:44,683 INFO L225 Difference]: With dead ends: 1667 [2022-02-18 16:23:44,683 INFO L226 Difference]: Without dead ends: 1532 [2022-02-18 16:23:44,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=903, Invalid=3387, Unknown=0, NotChecked=0, Total=4290 [2022-02-18 16:23:44,684 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 324 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:23:44,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 456 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 16:23:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2022-02-18 16:23:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 419. [2022-02-18 16:23:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.354066985645933) internal successors, (1402), 418 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1402 transitions. [2022-02-18 16:23:44,699 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1402 transitions. Word has length 20 [2022-02-18 16:23:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:23:44,699 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1402 transitions. [2022-02-18 16:23:44,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1402 transitions. [2022-02-18 16:23:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:23:44,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:23:44,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:23:44,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-18 16:23:44,915 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,SelfDestructingSolverStorable32 [2022-02-18 16:23:44,915 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:23:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:23:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash -12152748, now seen corresponding path program 8 times [2022-02-18 16:23:44,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:23:44,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663723387] [2022-02-18 16:23:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:23:44,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:23:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:23:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:45,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:23:45,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663723387] [2022-02-18 16:23:45,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663723387] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:23:45,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082361327] [2022-02-18 16:23:45,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:23:45,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:23:45,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:23:45,189 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) [2022-02-18 16:23:45,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-18 16:23:45,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:23:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:23:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:23:45,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:23:45,770 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 288 treesize of output 246 [2022-02-18 16:23:46,205 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 273 treesize of output 233 [2022-02-18 16:23:46,209 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 220 treesize of output 198 [2022-02-18 16:23:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:46,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:23:47,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:47,953 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 242 treesize of output 228 [2022-02-18 16:23:48,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:48,862 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 221 treesize of output 203 [2022-02-18 16:23:48,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:48,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 185 [2022-02-18 16:23:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:49,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082361327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:23:49,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:23:49,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:23:49,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367713056] [2022-02-18 16:23:49,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:23:49,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:23:49,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:23:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:23:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:23:49,091 INFO L87 Difference]: Start difference. First operand 419 states and 1402 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:23:49,729 INFO L93 Difference]: Finished difference Result 720 states and 2219 transitions. [2022-02-18 16:23:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-18 16:23:49,729 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:23:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:23:49,731 INFO L225 Difference]: With dead ends: 720 [2022-02-18 16:23:49,732 INFO L226 Difference]: Without dead ends: 705 [2022-02-18 16:23:49,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-02-18 16:23:49,732 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:23:49,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 225 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:23:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-18 16:23:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 424. [2022-02-18 16:23:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.3451536643026003) internal successors, (1415), 423 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1415 transitions. [2022-02-18 16:23:49,743 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1415 transitions. Word has length 20 [2022-02-18 16:23:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:23:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1415 transitions. [2022-02-18 16:23:49,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1415 transitions. [2022-02-18 16:23:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:23:49,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:23:49,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:23:49,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-18 16:23:49,959 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,SelfDestructingSolverStorable33 [2022-02-18 16:23:49,959 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:23:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:23:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash 741157802, now seen corresponding path program 9 times [2022-02-18 16:23:49,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:23:49,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705355621] [2022-02-18 16:23:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:23:49,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:23:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:23:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:50,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:23:50,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705355621] [2022-02-18 16:23:50,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705355621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:23:50,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021356304] [2022-02-18 16:23:50,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:23:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:23:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:23:50,258 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) [2022-02-18 16:23:50,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-18 16:23:50,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 16:23:50,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:23:50,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:23:50,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:23:50,781 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 217 treesize of output 187 [2022-02-18 16:23:51,338 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 217 treesize of output 197 [2022-02-18 16:23:51,346 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 214 treesize of output 182 [2022-02-18 16:23:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:51,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:23:55,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:55,606 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 369 treesize of output 351 [2022-02-18 16:23:56,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:56,818 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 235 treesize of output 217 [2022-02-18 16:23:56,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:23:56,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 199 [2022-02-18 16:23:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:57,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021356304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:23:57,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:23:57,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:23:57,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61968249] [2022-02-18 16:23:57,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:23:57,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:23:57,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:23:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:23:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:23:57,174 INFO L87 Difference]: Start difference. First operand 424 states and 1415 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:23:58,245 INFO L93 Difference]: Finished difference Result 702 states and 2212 transitions. [2022-02-18 16:23:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 16:23:58,245 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:23:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:23:58,247 INFO L225 Difference]: With dead ends: 702 [2022-02-18 16:23:58,247 INFO L226 Difference]: Without dead ends: 687 [2022-02-18 16:23:58,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-02-18 16:23:58,248 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 241 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:23:58,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 266 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:23:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-02-18 16:23:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 427. [2022-02-18 16:23:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.352112676056338) internal successors, (1428), 426 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1428 transitions. [2022-02-18 16:23:58,258 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1428 transitions. Word has length 20 [2022-02-18 16:23:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:23:58,259 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1428 transitions. [2022-02-18 16:23:58,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:23:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1428 transitions. [2022-02-18 16:23:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:23:58,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:23:58,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:23:58,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-18 16:23:58,475 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,SelfDestructingSolverStorable34 [2022-02-18 16:23:58,476 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:23:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:23:58,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2059206530, now seen corresponding path program 10 times [2022-02-18 16:23:58,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:23:58,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704761067] [2022-02-18 16:23:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:23:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:23:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:23:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:23:58,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:23:58,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704761067] [2022-02-18 16:23:58,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704761067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:23:58,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239299360] [2022-02-18 16:23:58,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:23:58,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:23:58,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:23:58,818 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) [2022-02-18 16:23:58,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-18 16:23:58,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:23:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:23:58,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:23:58,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:23:59,527 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 358 treesize of output 298 [2022-02-18 16:24:00,497 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 389 treesize of output 323 [2022-02-18 16:24:00,502 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 327 treesize of output 289 [2022-02-18 16:24:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:00,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:04,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:04,137 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 493 treesize of output 453 [2022-02-18 16:24:07,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:07,451 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 208 treesize of output 188 [2022-02-18 16:24:07,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:07,462 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 184 treesize of output 168 [2022-02-18 16:24:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:07,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239299360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:07,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:07,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:24:07,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091948716] [2022-02-18 16:24:07,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:07,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:24:07,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:24:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:24:07,698 INFO L87 Difference]: Start difference. First operand 427 states and 1428 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:15,618 INFO L93 Difference]: Finished difference Result 1300 states and 3828 transitions. [2022-02-18 16:24:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-18 16:24:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:24:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:15,623 INFO L225 Difference]: With dead ends: 1300 [2022-02-18 16:24:15,623 INFO L226 Difference]: Without dead ends: 1195 [2022-02-18 16:24:15,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=882, Invalid=3408, Unknown=0, NotChecked=0, Total=4290 [2022-02-18 16:24:15,624 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 249 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:15,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 512 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 16:24:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-18 16:24:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 449. [2022-02-18 16:24:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.372767857142857) internal successors, (1511), 448 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1511 transitions. [2022-02-18 16:24:15,637 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1511 transitions. Word has length 20 [2022-02-18 16:24:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:15,637 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1511 transitions. [2022-02-18 16:24:15,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1511 transitions. [2022-02-18 16:24:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:24:15,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:15,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:15,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:15,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:15,852 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1094297292, now seen corresponding path program 11 times [2022-02-18 16:24:15,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:15,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816573231] [2022-02-18 16:24:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:16,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:16,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816573231] [2022-02-18 16:24:16,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816573231] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:16,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959876448] [2022-02-18 16:24:16,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:24:16,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:16,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:16,171 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) [2022-02-18 16:24:16,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-18 16:24:16,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:24:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:24:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:24:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:16,714 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 189 treesize of output 167 [2022-02-18 16:24:17,055 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 252 treesize of output 216 [2022-02-18 16:24:17,058 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 220 treesize of output 196 [2022-02-18 16:24:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:17,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:20,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:20,356 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 394 treesize of output 364 [2022-02-18 16:24:22,908 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:24:22,908 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 220 treesize of output 195 [2022-02-18 16:24:22,914 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 196 treesize of output 172 [2022-02-18 16:24:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:23,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959876448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:23,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:23,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:24:23,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498058701] [2022-02-18 16:24:23,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:23,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:24:23,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:23,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:24:23,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:24:23,141 INFO L87 Difference]: Start difference. First operand 449 states and 1511 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:28,112 INFO L93 Difference]: Finished difference Result 1528 states and 4452 transitions. [2022-02-18 16:24:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-18 16:24:28,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:24:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:28,115 INFO L225 Difference]: With dead ends: 1528 [2022-02-18 16:24:28,115 INFO L226 Difference]: Without dead ends: 1423 [2022-02-18 16:24:28,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=685, Invalid=2975, Unknown=0, NotChecked=0, Total=3660 [2022-02-18 16:24:28,116 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 347 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:28,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 401 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:24:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-18 16:24:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 465. [2022-02-18 16:24:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.4116379310344827) internal successors, (1583), 464 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1583 transitions. [2022-02-18 16:24:28,142 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1583 transitions. Word has length 20 [2022-02-18 16:24:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:28,142 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1583 transitions. [2022-02-18 16:24:28,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1583 transitions. [2022-02-18 16:24:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:24:28,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:28,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:28,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:28,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-18 16:24:28,359 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1018131338, now seen corresponding path program 12 times [2022-02-18 16:24:28,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:28,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051089810] [2022-02-18 16:24:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:28,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:28,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:28,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051089810] [2022-02-18 16:24:28,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051089810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:28,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035574895] [2022-02-18 16:24:28,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:24:28,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:28,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:28,620 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) [2022-02-18 16:24:28,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-18 16:24:28,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 16:24:28,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:24:28,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:24:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:29,179 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 222 treesize of output 194 [2022-02-18 16:24:29,799 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 427 treesize of output 379 [2022-02-18 16:24:29,803 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 383 treesize of output 321 [2022-02-18 16:24:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:30,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:33,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:33,160 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 570 treesize of output 522 [2022-02-18 16:24:37,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:37,950 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 243 treesize of output 223 [2022-02-18 16:24:37,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:37,959 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 219 treesize of output 203 [2022-02-18 16:24:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:38,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035574895] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:38,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:38,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:24:38,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417041976] [2022-02-18 16:24:38,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:38,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:24:38,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:38,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:24:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:24:38,340 INFO L87 Difference]: Start difference. First operand 465 states and 1583 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,620 INFO L93 Difference]: Finished difference Result 1723 states and 5078 transitions. [2022-02-18 16:24:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-18 16:24:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:24:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,623 INFO L225 Difference]: With dead ends: 1723 [2022-02-18 16:24:45,623 INFO L226 Difference]: Without dead ends: 1588 [2022-02-18 16:24:45,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=922, Invalid=3368, Unknown=0, NotChecked=0, Total=4290 [2022-02-18 16:24:45,624 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 347 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:45,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 566 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 16:24:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-02-18 16:24:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 475. [2022-02-18 16:24:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.440928270042194) internal successors, (1631), 474 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1631 transitions. [2022-02-18 16:24:45,637 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1631 transitions. Word has length 20 [2022-02-18 16:24:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,637 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1631 transitions. [2022-02-18 16:24:45,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1631 transitions. [2022-02-18 16:24:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:24:45,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-18 16:24:45,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-18 16:24:45,848 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1579591014, now seen corresponding path program 13 times [2022-02-18 16:24:45,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702501492] [2022-02-18 16:24:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:46,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:46,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702501492] [2022-02-18 16:24:46,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702501492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:46,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288797282] [2022-02-18 16:24:46,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:24:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:46,249 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) [2022-02-18 16:24:46,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-18 16:24:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:46,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:24:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:46,893 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 268 treesize of output 230 [2022-02-18 16:24:47,536 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 322 treesize of output 278 [2022-02-18 16:24:47,541 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 282 treesize of output 240 [2022-02-18 16:24:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:48,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:52,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:52,157 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 431 treesize of output 393 [2022-02-18 16:24:55,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:55,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 375 treesize of output 335 [2022-02-18 16:24:55,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:55,407 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 331 treesize of output 295 [2022-02-18 16:24:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:55,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288797282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:55,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:55,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:24:55,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213477674] [2022-02-18 16:24:55,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:55,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:24:55,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:24:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:24:55,816 INFO L87 Difference]: Start difference. First operand 475 states and 1631 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:05,737 INFO L93 Difference]: Finished difference Result 2116 states and 6381 transitions. [2022-02-18 16:25:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-18 16:25:05,737 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:25:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:05,742 INFO L225 Difference]: With dead ends: 2116 [2022-02-18 16:25:05,742 INFO L226 Difference]: Without dead ends: 1966 [2022-02-18 16:25:05,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1182, Invalid=4074, Unknown=0, NotChecked=0, Total=5256 [2022-02-18 16:25:05,743 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 440 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:05,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 525 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1879 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 16:25:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-02-18 16:25:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 553. [2022-02-18 16:25:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 3.6322463768115942) internal successors, (2005), 552 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 2005 transitions. [2022-02-18 16:25:05,760 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 2005 transitions. Word has length 20 [2022-02-18 16:25:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:05,760 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 2005 transitions. [2022-02-18 16:25:05,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 2005 transitions. [2022-02-18 16:25:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:05,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:05,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:25:05,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:05,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-18 16:25:05,968 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1756516754, now seen corresponding path program 14 times [2022-02-18 16:25:05,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:05,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667555980] [2022-02-18 16:25:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:05,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:06,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:06,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667555980] [2022-02-18 16:25:06,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667555980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:06,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952660567] [2022-02-18 16:25:06,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:25:06,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:06,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:06,207 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) [2022-02-18 16:25:06,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-18 16:25:06,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:25:06,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:06,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:25:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:06,686 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 177 treesize of output 155 [2022-02-18 16:25:07,049 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 238 treesize of output 210 [2022-02-18 16:25:07,052 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 214 treesize of output 186 [2022-02-18 16:25:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:07,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:09,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:09,114 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 280 treesize of output 262 [2022-02-18 16:25:10,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:10,484 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 213 treesize of output 193 [2022-02-18 16:25:10,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:10,493 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 189 treesize of output 173 [2022-02-18 16:25:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:10,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952660567] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:10,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:10,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:25:10,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511664719] [2022-02-18 16:25:10,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:10,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:25:10,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:10,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:25:10,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:25:10,704 INFO L87 Difference]: Start difference. First operand 553 states and 2005 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:16,459 INFO L93 Difference]: Finished difference Result 1733 states and 5201 transitions. [2022-02-18 16:25:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-18 16:25:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:25:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:16,463 INFO L225 Difference]: With dead ends: 1733 [2022-02-18 16:25:16,463 INFO L226 Difference]: Without dead ends: 1613 [2022-02-18 16:25:16,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=903, Invalid=3519, Unknown=0, NotChecked=0, Total=4422 [2022-02-18 16:25:16,465 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 271 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:16,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 684 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 16:25:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2022-02-18 16:25:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 605. [2022-02-18 16:25:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.6109271523178808) internal successors, (2181), 604 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2181 transitions. [2022-02-18 16:25:16,483 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2181 transitions. Word has length 20 [2022-02-18 16:25:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:16,483 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 2181 transitions. [2022-02-18 16:25:16,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2181 transitions. [2022-02-18 16:25:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:16,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:16,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:25:16,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:16,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-18 16:25:16,700 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:16,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:16,700 INFO L85 PathProgramCache]: Analyzing trace with hash -981944474, now seen corresponding path program 15 times [2022-02-18 16:25:16,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:16,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437144440] [2022-02-18 16:25:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:16,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:16,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:16,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437144440] [2022-02-18 16:25:16,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437144440] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:16,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906287800] [2022-02-18 16:25:16,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:25:16,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:16,971 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) [2022-02-18 16:25:16,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-18 16:25:17,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 16:25:17,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:25:17,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:17,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:25:17,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 209 [2022-02-18 16:25:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:25:18,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 237 [2022-02-18 16:25:18,408 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 254 treesize of output 218 [2022-02-18 16:25:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:19,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:22,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:22,574 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 429 treesize of output 395 [2022-02-18 16:25:23,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:23,622 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 386 treesize of output 352 [2022-02-18 16:25:23,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:23,634 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 348 treesize of output 310 [2022-02-18 16:25:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:24,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906287800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:24,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:24,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:25:24,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315760955] [2022-02-18 16:25:24,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:24,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:25:24,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:25:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:25:24,281 INFO L87 Difference]: Start difference. First operand 605 states and 2181 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:25:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:25,055 INFO L93 Difference]: Finished difference Result 833 states and 2861 transitions. [2022-02-18 16:25:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:25:25,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:25:25,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:25,057 INFO L225 Difference]: With dead ends: 833 [2022-02-18 16:25:25,057 INFO L226 Difference]: Without dead ends: 818 [2022-02-18 16:25:25,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2022-02-18 16:25:25,058 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:25,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 156 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 366 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-02-18 16:25:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-02-18 16:25:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 606. [2022-02-18 16:25:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.613223140495868) internal successors, (2186), 605 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2186 transitions. [2022-02-18 16:25:25,067 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2186 transitions. Word has length 20 [2022-02-18 16:25:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:25,067 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 2186 transitions. [2022-02-18 16:25:25,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:25:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2186 transitions. [2022-02-18 16:25:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:25,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:25,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:25:25,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:25,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:25,269 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:25,270 INFO L85 PathProgramCache]: Analyzing trace with hash 512658490, now seen corresponding path program 16 times [2022-02-18 16:25:25,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:25,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329290896] [2022-02-18 16:25:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:25,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:25,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:25,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329290896] [2022-02-18 16:25:25,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329290896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:25,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715073539] [2022-02-18 16:25:25,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:25:25,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:25,595 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) [2022-02-18 16:25:25,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-18 16:25:25,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:25:25,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:25,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:25:25,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:25,977 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 237 treesize of output 203 [2022-02-18 16:25:26,542 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 196 [2022-02-18 16:25:26,546 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 200 treesize of output 176 [2022-02-18 16:25:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:26,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:29,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:29,410 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 291 treesize of output 263 [2022-02-18 16:25:31,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:31,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 243 [2022-02-18 16:25:31,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:31,525 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 239 treesize of output 219 [2022-02-18 16:25:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:32,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715073539] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:32,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:32,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:25:32,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920156229] [2022-02-18 16:25:32,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:32,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:25:32,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:25:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:25:32,172 INFO L87 Difference]: Start difference. First operand 606 states and 2186 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:25:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:36,681 INFO L93 Difference]: Finished difference Result 1338 states and 4225 transitions. [2022-02-18 16:25:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-18 16:25:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:25:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:36,686 INFO L225 Difference]: With dead ends: 1338 [2022-02-18 16:25:36,686 INFO L226 Difference]: Without dead ends: 1248 [2022-02-18 16:25:36,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 16:25:36,687 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 228 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:36,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 333 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:25:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-02-18 16:25:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 630. [2022-02-18 16:25:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.6375198728139906) internal successors, (2288), 629 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 2288 transitions. [2022-02-18 16:25:36,703 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 2288 transitions. Word has length 20 [2022-02-18 16:25:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:36,704 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 2288 transitions. [2022-02-18 16:25:36,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:25:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 2288 transitions. [2022-02-18 16:25:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:36,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:36,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:25:36,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:36,927 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,SelfDestructingSolverStorable41 [2022-02-18 16:25:36,927 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1023833012, now seen corresponding path program 17 times [2022-02-18 16:25:36,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:36,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752130334] [2022-02-18 16:25:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:37,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:37,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752130334] [2022-02-18 16:25:37,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752130334] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:37,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745197879] [2022-02-18 16:25:37,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:25:37,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:37,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:37,221 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) [2022-02-18 16:25:37,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-18 16:25:37,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 16:25:37,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:25:37,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:37,660 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 224 treesize of output 196 [2022-02-18 16:25:37,968 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 222 treesize of output 192 [2022-02-18 16:25:37,971 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 196 treesize of output 170 [2022-02-18 16:25:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:39,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:41,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:42,000 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 622 treesize of output 576 [2022-02-18 16:25:44,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:44,419 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 393 treesize of output 353 [2022-02-18 16:25:44,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:44,429 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 349 treesize of output 313 [2022-02-18 16:25:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:44,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745197879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:44,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:44,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:25:44,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289230319] [2022-02-18 16:25:44,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:44,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:25:44,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:44,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:25:44,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:25:44,815 INFO L87 Difference]: Start difference. First operand 630 states and 2288 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:25:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:50,613 INFO L93 Difference]: Finished difference Result 1441 states and 4561 transitions. [2022-02-18 16:25:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-18 16:25:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:25:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:50,617 INFO L225 Difference]: With dead ends: 1441 [2022-02-18 16:25:50,617 INFO L226 Difference]: Without dead ends: 1306 [2022-02-18 16:25:50,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=644, Invalid=2548, Unknown=0, NotChecked=0, Total=3192 [2022-02-18 16:25:50,617 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 401 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:50,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 415 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:25:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-02-18 16:25:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 635. [2022-02-18 16:25:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.673501577287066) internal successors, (2329), 634 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2329 transitions. [2022-02-18 16:25:50,631 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2329 transitions. Word has length 20 [2022-02-18 16:25:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:50,631 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 2329 transitions. [2022-02-18 16:25:50,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:25:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2329 transitions. [2022-02-18 16:25:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:50,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:50,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:25:50,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:50,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:50,837 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash 493673104, now seen corresponding path program 18 times [2022-02-18 16:25:50,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:50,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114368846] [2022-02-18 16:25:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:50,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:51,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:51,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114368846] [2022-02-18 16:25:51,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114368846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:51,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004217438] [2022-02-18 16:25:51,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:25:51,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:51,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:51,141 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) [2022-02-18 16:25:51,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-18 16:25:51,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:25:51,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:25:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:51,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:25:51,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-02-18 16:25:52,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:25:52,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 229 [2022-02-18 16:25:52,740 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 233 treesize of output 207 [2022-02-18 16:25:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:53,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:56,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:56,557 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 352 treesize of output 318 [2022-02-18 16:25:58,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:58,268 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 284 treesize of output 258 [2022-02-18 16:25:58,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:58,287 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 254 treesize of output 236 [2022-02-18 16:25:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:59,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004217438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:59,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:59,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:25:59,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499660782] [2022-02-18 16:25:59,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:59,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:25:59,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:59,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:25:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:25:59,477 INFO L87 Difference]: Start difference. First operand 635 states and 2329 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:05,177 INFO L93 Difference]: Finished difference Result 1613 states and 4902 transitions. [2022-02-18 16:26:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-18 16:26:05,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:26:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:05,182 INFO L225 Difference]: With dead ends: 1613 [2022-02-18 16:26:05,182 INFO L226 Difference]: Without dead ends: 1508 [2022-02-18 16:26:05,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=938, Invalid=3618, Unknown=0, NotChecked=0, Total=4556 [2022-02-18 16:26:05,183 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 341 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:05,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 485 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1021 Invalid, 0 Unknown, 531 Unchecked, 0.7s Time] [2022-02-18 16:26:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2022-02-18 16:26:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 660. [2022-02-18 16:26:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.675265553869499) internal successors, (2422), 659 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2422 transitions. [2022-02-18 16:26:05,202 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2422 transitions. Word has length 20 [2022-02-18 16:26:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:05,202 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2422 transitions. [2022-02-18 16:26:05,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2422 transitions. [2022-02-18 16:26:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:05,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:05,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:26:05,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:05,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:05,419 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:05,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1988276068, now seen corresponding path program 19 times [2022-02-18 16:26:05,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:05,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926688312] [2022-02-18 16:26:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:05,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:05,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926688312] [2022-02-18 16:26:05,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926688312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:05,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151283948] [2022-02-18 16:26:05,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:26:05,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:05,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:05,723 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) [2022-02-18 16:26:05,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-18 16:26:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:26:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:06,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:26:06,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 353 treesize of output 297 [2022-02-18 16:26:08,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:26:08,099 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 277 [2022-02-18 16:26:08,103 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 281 treesize of output 243 [2022-02-18 16:26:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:08,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:11,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:11,442 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 342 treesize of output 314 [2022-02-18 16:26:11,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:11,978 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 264 treesize of output 240 [2022-02-18 16:26:11,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:11,987 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 236 treesize of output 220 [2022-02-18 16:26:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:13,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151283948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:13,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:13,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:26:13,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027079923] [2022-02-18 16:26:13,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:13,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:26:13,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:26:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:26:13,024 INFO L87 Difference]: Start difference. First operand 660 states and 2422 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:19,400 INFO L93 Difference]: Finished difference Result 1472 states and 4643 transitions. [2022-02-18 16:26:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-18 16:26:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:26:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:19,403 INFO L225 Difference]: With dead ends: 1472 [2022-02-18 16:26:19,403 INFO L226 Difference]: Without dead ends: 1354 [2022-02-18 16:26:19,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=679, Invalid=4013, Unknown=0, NotChecked=0, Total=4692 [2022-02-18 16:26:19,404 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 213 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:19,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 649 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1131 Invalid, 0 Unknown, 372 Unchecked, 0.7s Time] [2022-02-18 16:26:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-02-18 16:26:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 680. [2022-02-18 16:26:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.658321060382916) internal successors, (2484), 679 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2484 transitions. [2022-02-18 16:26:19,418 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2484 transitions. Word has length 20 [2022-02-18 16:26:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:19,418 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2484 transitions. [2022-02-18 16:26:19,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2484 transitions. [2022-02-18 16:26:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:19,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:19,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:26:19,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:19,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:19,620 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:19,620 INFO L85 PathProgramCache]: Analyzing trace with hash -413527408, now seen corresponding path program 20 times [2022-02-18 16:26:19,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:19,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421626989] [2022-02-18 16:26:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:19,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:20,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:20,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421626989] [2022-02-18 16:26:20,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421626989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:20,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107679361] [2022-02-18 16:26:20,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:26:20,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:20,049 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) [2022-02-18 16:26:20,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-18 16:26:20,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:26:20,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:20,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:26:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:20,555 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 254 treesize of output 216 [2022-02-18 16:26:21,343 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 238 treesize of output 204 [2022-02-18 16:26:21,346 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 208 treesize of output 184 [2022-02-18 16:26:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:21,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:24,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:24,914 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 320 treesize of output 288 [2022-02-18 16:26:26,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:26,038 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 463 treesize of output 421 [2022-02-18 16:26:26,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:26,053 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 400 treesize of output 358 [2022-02-18 16:26:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:27,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107679361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:27,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:27,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:26:27,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735965878] [2022-02-18 16:26:27,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:27,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:26:27,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:27,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:26:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:26:27,099 INFO L87 Difference]: Start difference. First operand 680 states and 2484 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:32,669 INFO L93 Difference]: Finished difference Result 1316 states and 4237 transitions. [2022-02-18 16:26:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-18 16:26:32,670 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:26:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:32,673 INFO L225 Difference]: With dead ends: 1316 [2022-02-18 16:26:32,673 INFO L226 Difference]: Without dead ends: 1241 [2022-02-18 16:26:32,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=455, Invalid=1995, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 16:26:32,674 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 238 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:32,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 378 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:26:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-02-18 16:26:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 667. [2022-02-18 16:26:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.665165165165165) internal successors, (2441), 666 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2441 transitions. [2022-02-18 16:26:32,690 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2441 transitions. Word has length 20 [2022-02-18 16:26:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:32,691 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 2441 transitions. [2022-02-18 16:26:32,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2441 transitions. [2022-02-18 16:26:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:32,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:32,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:26:32,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:32,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:32,908 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1025069888, now seen corresponding path program 21 times [2022-02-18 16:26:32,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:32,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852165704] [2022-02-18 16:26:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:32,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:33,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:33,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852165704] [2022-02-18 16:26:33,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852165704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:33,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523585546] [2022-02-18 16:26:33,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:26:33,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:33,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:33,199 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) [2022-02-18 16:26:33,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-18 16:26:33,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 16:26:33,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:33,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:26:33,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:33,906 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 308 treesize of output 258 [2022-02-18 16:26:34,338 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 283 treesize of output 245 [2022-02-18 16:26:34,341 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 232 treesize of output 208 [2022-02-18 16:26:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:34,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:37,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:37,834 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 576 treesize of output 548 [2022-02-18 16:26:42,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:42,725 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 377 treesize of output 335 [2022-02-18 16:26:42,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:42,735 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 314 treesize of output 286 [2022-02-18 16:26:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:43,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523585546] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:43,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:43,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:26:43,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456741475] [2022-02-18 16:26:43,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:43,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:26:43,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:43,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:26:43,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:26:43,472 INFO L87 Difference]: Start difference. First operand 667 states and 2441 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:44,421 INFO L93 Difference]: Finished difference Result 831 states and 2893 transitions. [2022-02-18 16:26:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-18 16:26:44,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:26:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:44,424 INFO L225 Difference]: With dead ends: 831 [2022-02-18 16:26:44,424 INFO L226 Difference]: Without dead ends: 816 [2022-02-18 16:26:44,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 16:26:44,424 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 120 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:44,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 181 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:26:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-02-18 16:26:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 672. [2022-02-18 16:26:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.661698956780924) internal successors, (2457), 671 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2457 transitions. [2022-02-18 16:26:44,438 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2457 transitions. Word has length 20 [2022-02-18 16:26:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:44,438 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 2457 transitions. [2022-02-18 16:26:44,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2457 transitions. [2022-02-18 16:26:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:44,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:44,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:26:44,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:44,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-18 16:26:44,655 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash 150420756, now seen corresponding path program 22 times [2022-02-18 16:26:44,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:44,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353017726] [2022-02-18 16:26:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:44,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:45,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:45,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353017726] [2022-02-18 16:26:45,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353017726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:45,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992105202] [2022-02-18 16:26:45,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:26:45,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:45,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:45,008 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) [2022-02-18 16:26:45,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-18 16:26:45,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:26:45,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:26:45,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:45,503 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 235 treesize of output 213 [2022-02-18 16:26:45,940 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 365 treesize of output 305 [2022-02-18 16:26:45,944 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 309 treesize of output 273 [2022-02-18 16:26:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:46,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:48,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:48,311 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 586 treesize of output 544 [2022-02-18 16:26:50,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:50,735 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 312 treesize of output 286 [2022-02-18 16:26:50,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:50,744 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 265 treesize of output 249 [2022-02-18 16:26:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:51,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992105202] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:51,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:51,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:26:51,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150854291] [2022-02-18 16:26:51,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:51,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:26:51,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:26:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:26:51,829 INFO L87 Difference]: Start difference. First operand 672 states and 2457 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:52,393 INFO L93 Difference]: Finished difference Result 758 states and 2706 transitions. [2022-02-18 16:26:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 16:26:52,394 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:26:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:52,395 INFO L225 Difference]: With dead ends: 758 [2022-02-18 16:26:52,395 INFO L226 Difference]: Without dead ends: 743 [2022-02-18 16:26:52,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2022-02-18 16:26:52,396 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:52,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 140 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 16:26:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-02-18 16:26:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2022-02-18 16:26:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.662721893491124) internal successors, (2476), 676 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2476 transitions. [2022-02-18 16:26:52,405 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2476 transitions. Word has length 20 [2022-02-18 16:26:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:52,405 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2476 transitions. [2022-02-18 16:26:52,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:26:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2476 transitions. [2022-02-18 16:26:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:52,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:52,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:26:52,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-18 16:26:52,607 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,SelfDestructingSolverStorable47 [2022-02-18 16:26:52,607 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1150295616, now seen corresponding path program 23 times [2022-02-18 16:26:52,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:52,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451296917] [2022-02-18 16:26:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:52,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:52,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:52,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451296917] [2022-02-18 16:26:52,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451296917] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:52,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997065246] [2022-02-18 16:26:52,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:26:52,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:52,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:52,898 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) [2022-02-18 16:26:52,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-18 16:26:52,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:26:52,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:26:52,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:53,485 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 211 treesize of output 187 [2022-02-18 16:26:54,297 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 417 treesize of output 349 [2022-02-18 16:26:54,301 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 353 treesize of output 313 [2022-02-18 16:26:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:54,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:57,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:57,773 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 552 treesize of output 506 [2022-02-18 16:27:01,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:01,406 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 427 treesize of output 381 [2022-02-18 16:27:01,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:01,415 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 377 treesize of output 337 [2022-02-18 16:27:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:02,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997065246] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:02,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:02,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:02,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003346288] [2022-02-18 16:27:02,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:02,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:02,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:02,283 INFO L87 Difference]: Start difference. First operand 677 states and 2476 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:27:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:06,638 INFO L93 Difference]: Finished difference Result 1360 states and 4306 transitions. [2022-02-18 16:27:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 16:27:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:27:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:06,641 INFO L225 Difference]: With dead ends: 1360 [2022-02-18 16:27:06,641 INFO L226 Difference]: Without dead ends: 1270 [2022-02-18 16:27:06,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=431, Invalid=1825, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 16:27:06,641 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 182 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:06,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 469 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:27:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-02-18 16:27:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 688. [2022-02-18 16:27:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.6739446870451236) internal successors, (2524), 687 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2524 transitions. [2022-02-18 16:27:06,653 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2524 transitions. Word has length 20 [2022-02-18 16:27:06,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:06,653 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 2524 transitions. [2022-02-18 16:27:06,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:27:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2524 transitions. [2022-02-18 16:27:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:06,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:06,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:27:06,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:06,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-18 16:27:06,855 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:06,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1503435106, now seen corresponding path program 24 times [2022-02-18 16:27:06,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:06,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244109944] [2022-02-18 16:27:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:06,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:07,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:07,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244109944] [2022-02-18 16:27:07,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244109944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:07,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117474560] [2022-02-18 16:27:07,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:27:07,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:07,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:07,255 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) [2022-02-18 16:27:07,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-18 16:27:07,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:27:07,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:27:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:07,731 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 205 treesize of output 177 [2022-02-18 16:27:08,091 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 229 treesize of output 197 [2022-02-18 16:27:08,094 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 201 treesize of output 177 [2022-02-18 16:27:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:08,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:11,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:11,599 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 485 treesize of output 461 [2022-02-18 16:27:16,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:16,591 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 323 treesize of output 301 [2022-02-18 16:27:16,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:16,600 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 280 treesize of output 260 [2022-02-18 16:27:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:18,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117474560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:18,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:18,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:27:18,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352751] [2022-02-18 16:27:18,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:18,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:27:18,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:27:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:27:18,634 INFO L87 Difference]: Start difference. First operand 688 states and 2524 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:27:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:23,406 INFO L93 Difference]: Finished difference Result 1312 states and 4256 transitions. [2022-02-18 16:27:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-18 16:27:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:27:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:23,408 INFO L225 Difference]: With dead ends: 1312 [2022-02-18 16:27:23,408 INFO L226 Difference]: Without dead ends: 1237 [2022-02-18 16:27:23,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=683, Invalid=2739, Unknown=0, NotChecked=0, Total=3422 [2022-02-18 16:27:23,409 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 239 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:23,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 345 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:27:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-02-18 16:27:23,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 684. [2022-02-18 16:27:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.6910688140556367) internal successors, (2521), 683 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2521 transitions. [2022-02-18 16:27:23,422 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2521 transitions. Word has length 20 [2022-02-18 16:27:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:23,423 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 2521 transitions. [2022-02-18 16:27:23,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:27:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2521 transitions. [2022-02-18 16:27:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:23,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:23,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:27:23,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:23,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-18 16:27:23,625 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:23,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1573545142, now seen corresponding path program 25 times [2022-02-18 16:27:23,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:23,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3519368] [2022-02-18 16:27:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:23,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:23,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:23,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3519368] [2022-02-18 16:27:23,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3519368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:23,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455849068] [2022-02-18 16:27:23,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:27:23,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:23,959 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) [2022-02-18 16:27:23,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-18 16:27:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:27:24,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:24,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 234 [2022-02-18 16:27:25,004 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 317 treesize of output 279 [2022-02-18 16:27:25,008 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 283 treesize of output 235 [2022-02-18 16:27:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:25,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:29,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:29,442 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 589 treesize of output 523 [2022-02-18 16:27:36,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:36,159 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 267 treesize of output 245 [2022-02-18 16:27:36,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:36,168 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 241 treesize of output 223 [2022-02-18 16:27:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:37,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455849068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:37,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:37,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:27:37,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045254424] [2022-02-18 16:27:37,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:37,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:27:37,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:27:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:27:37,407 INFO L87 Difference]: Start difference. First operand 684 states and 2521 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:27:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:43,692 INFO L93 Difference]: Finished difference Result 1497 states and 4761 transitions. [2022-02-18 16:27:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-18 16:27:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:27:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:43,695 INFO L225 Difference]: With dead ends: 1497 [2022-02-18 16:27:43,695 INFO L226 Difference]: Without dead ends: 1407 [2022-02-18 16:27:43,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=684, Invalid=2286, Unknown=0, NotChecked=0, Total=2970 [2022-02-18 16:27:43,695 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 306 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:43,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 414 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:27:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-02-18 16:27:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 700. [2022-02-18 16:27:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.6952789699570814) internal successors, (2583), 699 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2583 transitions. [2022-02-18 16:27:43,709 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2583 transitions. Word has length 20 [2022-02-18 16:27:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:43,709 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2583 transitions. [2022-02-18 16:27:43,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:27:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2583 transitions. [2022-02-18 16:27:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:43,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:43,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:27:43,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:43,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:43,912 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash -858037054, now seen corresponding path program 26 times [2022-02-18 16:27:43,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:43,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71881750] [2022-02-18 16:27:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:44,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:44,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71881750] [2022-02-18 16:27:44,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71881750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:44,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776824400] [2022-02-18 16:27:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:27:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:44,248 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) [2022-02-18 16:27:44,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-18 16:27:44,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:27:44,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:27:44,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:44,664 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 251 treesize of output 215 [2022-02-18 16:27:46,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:46,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 204 [2022-02-18 16:27:46,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:46,549 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 182 [2022-02-18 16:27:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:47,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:50,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:50,094 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 599 treesize of output 539 [2022-02-18 16:27:56,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:56,191 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 594 treesize of output 550 [2022-02-18 16:27:56,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:56,202 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 546 treesize of output 510 [2022-02-18 16:28:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:01,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776824400] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:01,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:01,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:28:01,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814312369] [2022-02-18 16:28:01,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:01,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:28:01,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:28:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:28:01,291 INFO L87 Difference]: Start difference. First operand 700 states and 2583 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:28:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:04,420 INFO L93 Difference]: Finished difference Result 990 states and 3378 transitions. [2022-02-18 16:28:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-18 16:28:04,420 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:28:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:04,422 INFO L225 Difference]: With dead ends: 990 [2022-02-18 16:28:04,422 INFO L226 Difference]: Without dead ends: 945 [2022-02-18 16:28:04,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-02-18 16:28:04,422 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:04,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 366 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 901 Invalid, 0 Unknown, 186 Unchecked, 0.6s Time] [2022-02-18 16:28:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-02-18 16:28:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 699. [2022-02-18 16:28:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.6991404011461317) internal successors, (2582), 698 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2582 transitions. [2022-02-18 16:28:04,435 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2582 transitions. Word has length 20 [2022-02-18 16:28:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:04,435 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2582 transitions. [2022-02-18 16:28:04,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:28:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2582 transitions. [2022-02-18 16:28:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:04,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:04,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:28:04,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:04,637 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,SelfDestructingSolverStorable51 [2022-02-18 16:28:04,637 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:04,637 INFO L85 PathProgramCache]: Analyzing trace with hash 208511268, now seen corresponding path program 27 times [2022-02-18 16:28:04,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:04,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420210234] [2022-02-18 16:28:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:04,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:04,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420210234] [2022-02-18 16:28:04,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420210234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:04,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159758792] [2022-02-18 16:28:04,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:28:04,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:04,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:04,929 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) [2022-02-18 16:28:04,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-18 16:28:04,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:28:04,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:28:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:05,348 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 243 treesize of output 213 [2022-02-18 16:28:06,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:06,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 214 [2022-02-18 16:28:06,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:06,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 181 [2022-02-18 16:28:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:07,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:09,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:09,838 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 292 treesize of output 276 [2022-02-18 16:28:11,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:11,140 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 407 treesize of output 357 [2022-02-18 16:28:11,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:11,150 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 353 treesize of output 319 [2022-02-18 16:28:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:11,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159758792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:11,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:11,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:28:11,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970714041] [2022-02-18 16:28:11,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:11,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:28:11,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:11,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:28:11,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:28:11,575 INFO L87 Difference]: Start difference. First operand 699 states and 2582 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:12,162 INFO L93 Difference]: Finished difference Result 840 states and 2976 transitions. [2022-02-18 16:28:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-18 16:28:12,163 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:28:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:12,164 INFO L225 Difference]: With dead ends: 840 [2022-02-18 16:28:12,164 INFO L226 Difference]: Without dead ends: 825 [2022-02-18 16:28:12,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-02-18 16:28:12,165 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 83 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:12,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 188 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 629 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-02-18 16:28:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-02-18 16:28:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 696. [2022-02-18 16:28:12,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 3.6992805755395683) internal successors, (2571), 695 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 2571 transitions. [2022-02-18 16:28:12,175 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 2571 transitions. Word has length 20 [2022-02-18 16:28:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:12,176 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 2571 transitions. [2022-02-18 16:28:12,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 2571 transitions. [2022-02-18 16:28:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:12,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:12,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:28:12,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:12,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:12,377 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash 183038138, now seen corresponding path program 28 times [2022-02-18 16:28:12,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:12,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966523596] [2022-02-18 16:28:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:12,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:12,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966523596] [2022-02-18 16:28:12,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966523596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:12,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011600952] [2022-02-18 16:28:12,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:28:12,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:12,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:12,744 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) [2022-02-18 16:28:12,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-18 16:28:12,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:28:12,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:12,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:28:12,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:13,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:13,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 172 [2022-02-18 16:28:13,812 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 416 treesize of output 350 [2022-02-18 16:28:13,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:13,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 337 treesize of output 303 [2022-02-18 16:28:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:15,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:17,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:17,649 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 502 treesize of output 468 [2022-02-18 16:28:18,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:18,869 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 368 treesize of output 338 [2022-02-18 16:28:18,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:18,879 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 334 treesize of output 296 [2022-02-18 16:28:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:19,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011600952] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:19,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:19,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:28:19,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477407724] [2022-02-18 16:28:19,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:19,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:28:19,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:28:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:28:19,490 INFO L87 Difference]: Start difference. First operand 696 states and 2571 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:28:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:20,762 INFO L93 Difference]: Finished difference Result 1019 states and 3523 transitions. [2022-02-18 16:28:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-18 16:28:20,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:28:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:20,764 INFO L225 Difference]: With dead ends: 1019 [2022-02-18 16:28:20,765 INFO L226 Difference]: Without dead ends: 1004 [2022-02-18 16:28:20,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 16:28:20,765 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:20,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 216 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:28:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-02-18 16:28:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 700. [2022-02-18 16:28:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.703862660944206) internal successors, (2589), 699 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2589 transitions. [2022-02-18 16:28:20,779 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2589 transitions. Word has length 20 [2022-02-18 16:28:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:20,779 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2589 transitions. [2022-02-18 16:28:20,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:28:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2589 transitions. [2022-02-18 16:28:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:20,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:20,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:28:20,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:21,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:21,004 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1893791166, now seen corresponding path program 29 times [2022-02-18 16:28:21,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:21,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977354406] [2022-02-18 16:28:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:21,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:21,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:21,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977354406] [2022-02-18 16:28:21,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977354406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:21,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447976430] [2022-02-18 16:28:21,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:28:21,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:21,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:21,380 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) [2022-02-18 16:28:21,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-18 16:28:21,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:28:21,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:28:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:21,871 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 222 treesize of output 190 [2022-02-18 16:28:22,583 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 192 [2022-02-18 16:28:22,587 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 196 treesize of output 172 [2022-02-18 16:28:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:22,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:24,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:24,861 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 401 treesize of output 369 [2022-02-18 16:28:26,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:26,276 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 365 treesize of output 333 [2022-02-18 16:28:26,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:26,285 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 329 treesize of output 309 [2022-02-18 16:28:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:28,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447976430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:28,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:28,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:28:28,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012447540] [2022-02-18 16:28:28,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:28,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:28:28,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:28,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:28:28,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:28:28,439 INFO L87 Difference]: Start difference. First operand 700 states and 2589 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:28:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:32,420 INFO L93 Difference]: Finished difference Result 1212 states and 3984 transitions. [2022-02-18 16:28:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-18 16:28:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:28:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:32,422 INFO L225 Difference]: With dead ends: 1212 [2022-02-18 16:28:32,422 INFO L226 Difference]: Without dead ends: 1137 [2022-02-18 16:28:32,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=415, Invalid=2135, Unknown=0, NotChecked=0, Total=2550 [2022-02-18 16:28:32,423 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 199 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:32,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 516 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:28:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-02-18 16:28:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 731. [2022-02-18 16:28:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.6780821917808217) internal successors, (2685), 730 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2685 transitions. [2022-02-18 16:28:32,434 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2685 transitions. Word has length 20 [2022-02-18 16:28:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:32,434 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2685 transitions. [2022-02-18 16:28:32,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:28:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2685 transitions. [2022-02-18 16:28:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:32,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:32,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:28:32,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:32,635 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,SelfDestructingSolverStorable54 [2022-02-18 16:28:32,636 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash 810278018, now seen corresponding path program 30 times [2022-02-18 16:28:32,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:32,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430303979] [2022-02-18 16:28:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:32,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:32,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:32,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430303979] [2022-02-18 16:28:32,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430303979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:32,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632720714] [2022-02-18 16:28:32,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:28:32,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:32,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:32,898 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) [2022-02-18 16:28:32,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-18 16:28:32,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:28:32,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:28:32,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:33,289 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 237 treesize of output 203 [2022-02-18 16:28:33,772 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 275 treesize of output 241 [2022-02-18 16:28:33,775 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 245 treesize of output 217 [2022-02-18 16:28:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:34,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:36,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:36,318 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 343 treesize of output 313 [2022-02-18 16:28:37,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:37,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 226 [2022-02-18 16:28:37,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:37,430 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 222 treesize of output 204 [2022-02-18 16:28:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:38,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632720714] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:38,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:38,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:28:38,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533947191] [2022-02-18 16:28:38,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:38,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:28:38,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:28:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:28:38,823 INFO L87 Difference]: Start difference. First operand 731 states and 2685 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:40,125 INFO L93 Difference]: Finished difference Result 1043 states and 3523 transitions. [2022-02-18 16:28:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-18 16:28:40,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:28:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:40,127 INFO L225 Difference]: With dead ends: 1043 [2022-02-18 16:28:40,127 INFO L226 Difference]: Without dead ends: 983 [2022-02-18 16:28:40,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2022-02-18 16:28:40,128 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:40,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 254 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:28:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-02-18 16:28:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 735. [2022-02-18 16:28:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.6920980926430516) internal successors, (2710), 734 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2710 transitions. [2022-02-18 16:28:40,137 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2710 transitions. Word has length 20 [2022-02-18 16:28:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:40,138 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2710 transitions. [2022-02-18 16:28:40,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2710 transitions. [2022-02-18 16:28:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:40,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:40,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:28:40,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:40,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:40,340 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 881549188, now seen corresponding path program 31 times [2022-02-18 16:28:40,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:40,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877497512] [2022-02-18 16:28:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:40,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:40,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877497512] [2022-02-18 16:28:40,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877497512] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:40,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424416188] [2022-02-18 16:28:40,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:28:40,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:40,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:40,633 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) [2022-02-18 16:28:40,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-18 16:28:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:40,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:28:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:41,192 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 281 treesize of output 245 [2022-02-18 16:28:42,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:42,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 245 [2022-02-18 16:28:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:42,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 223 [2022-02-18 16:28:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:49,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:49,115 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 523 treesize of output 491 [2022-02-18 16:28:54,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:54,633 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 541 treesize of output 497 [2022-02-18 16:28:54,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:54,645 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 493 treesize of output 465 [2022-02-18 16:28:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:57,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424416188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:57,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:57,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:28:57,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215468381] [2022-02-18 16:28:57,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:57,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:28:57,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:28:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:28:57,519 INFO L87 Difference]: Start difference. First operand 735 states and 2710 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:29:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:02,695 INFO L93 Difference]: Finished difference Result 1158 states and 3858 transitions. [2022-02-18 16:29:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 16:29:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:29:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:02,698 INFO L225 Difference]: With dead ends: 1158 [2022-02-18 16:29:02,698 INFO L226 Difference]: Without dead ends: 1083 [2022-02-18 16:29:02,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 16:29:02,698 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 182 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:02,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 272 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 732 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-02-18 16:29:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-02-18 16:29:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 741. [2022-02-18 16:29:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.6905405405405407) internal successors, (2731), 740 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2731 transitions. [2022-02-18 16:29:02,713 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2731 transitions. Word has length 20 [2022-02-18 16:29:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:02,714 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2731 transitions. [2022-02-18 16:29:02,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:29:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2731 transitions. [2022-02-18 16:29:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:02,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:02,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:29:02,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:02,929 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,SelfDestructingSolverStorable56 [2022-02-18 16:29:02,929 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1918815144, now seen corresponding path program 32 times [2022-02-18 16:29:02,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:02,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904132807] [2022-02-18 16:29:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:03,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:03,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904132807] [2022-02-18 16:29:03,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904132807] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:03,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072092325] [2022-02-18 16:29:03,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:29:03,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:03,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:03,350 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) [2022-02-18 16:29:03,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-18 16:29:03,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:29:03,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:03,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:29:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:03,865 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 239 treesize of output 207 [2022-02-18 16:29:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:29:05,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 335 [2022-02-18 16:29:05,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:29:05,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 301 [2022-02-18 16:29:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:06,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:10,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:10,143 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 561 treesize of output 521 [2022-02-18 16:29:14,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:14,195 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 535 treesize of output 487 [2022-02-18 16:29:14,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:14,207 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 483 treesize of output 457 [2022-02-18 16:29:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:16,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072092325] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:16,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:16,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:29:16,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625654482] [2022-02-18 16:29:16,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:16,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:29:16,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:29:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:29:16,156 INFO L87 Difference]: Start difference. First operand 741 states and 2731 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:19,025 INFO L93 Difference]: Finished difference Result 1090 states and 3682 transitions. [2022-02-18 16:29:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-18 16:29:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:29:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:19,028 INFO L225 Difference]: With dead ends: 1090 [2022-02-18 16:29:19,028 INFO L226 Difference]: Without dead ends: 1030 [2022-02-18 16:29:19,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2022-02-18 16:29:19,028 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 131 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:19,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 378 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 827 Invalid, 0 Unknown, 150 Unchecked, 0.5s Time] [2022-02-18 16:29:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-02-18 16:29:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 749. [2022-02-18 16:29:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.685828877005348) internal successors, (2757), 748 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2757 transitions. [2022-02-18 16:29:19,038 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2757 transitions. Word has length 20 [2022-02-18 16:29:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:19,038 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2757 transitions. [2022-02-18 16:29:19,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:19,039 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2757 transitions. [2022-02-18 16:29:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:19,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:19,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:29:19,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:19,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:19,240 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:19,241 INFO L85 PathProgramCache]: Analyzing trace with hash -25651324, now seen corresponding path program 33 times [2022-02-18 16:29:19,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:19,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521513734] [2022-02-18 16:29:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:19,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:19,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:19,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521513734] [2022-02-18 16:29:19,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521513734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:19,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794098497] [2022-02-18 16:29:19,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:29:19,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:19,496 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) [2022-02-18 16:29:19,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-18 16:29:19,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:29:19,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:29:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:19,983 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 269 treesize of output 237 [2022-02-18 16:29:22,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:29:22,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 187 [2022-02-18 16:29:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:29:22,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 180 [2022-02-18 16:29:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:23,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:26,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:26,379 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 540 treesize of output 484 [2022-02-18 16:29:28,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:28,066 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 458 treesize of output 420 [2022-02-18 16:29:28,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:28,075 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 429 treesize of output 391 [2022-02-18 16:29:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:29,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794098497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:29,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:29,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:29:29,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317762524] [2022-02-18 16:29:29,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:29,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:29:29,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:29:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:29:29,080 INFO L87 Difference]: Start difference. First operand 749 states and 2757 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:29,318 INFO L93 Difference]: Finished difference Result 835 states and 2975 transitions. [2022-02-18 16:29:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 16:29:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:29:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:29,319 INFO L225 Difference]: With dead ends: 835 [2022-02-18 16:29:29,319 INFO L226 Difference]: Without dead ends: 820 [2022-02-18 16:29:29,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:29:29,320 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:29,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 139 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 377 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-02-18 16:29:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-02-18 16:29:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 754. [2022-02-18 16:29:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.683930942895086) internal successors, (2774), 753 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2774 transitions. [2022-02-18 16:29:29,330 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2774 transitions. Word has length 20 [2022-02-18 16:29:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:29,330 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2774 transitions. [2022-02-18 16:29:29,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2774 transitions. [2022-02-18 16:29:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:29,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:29,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:29:29,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:29,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-18 16:29:29,532 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1234688678, now seen corresponding path program 34 times [2022-02-18 16:29:29,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:29,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68118368] [2022-02-18 16:29:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:29,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:29,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68118368] [2022-02-18 16:29:29,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68118368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:29,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423850359] [2022-02-18 16:29:29,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:29:29,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:29,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:29,877 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:29:29,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-18 16:29:29,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:29:29,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:29:29,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:30,470 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 276 treesize of output 242 [2022-02-18 16:29:31,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:29:31,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 216 [2022-02-18 16:29:31,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:29:31,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 196 [2022-02-18 16:29:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:33,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:35,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:35,529 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 437 treesize of output 409 [2022-02-18 16:29:42,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:42,295 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 549 treesize of output 507 [2022-02-18 16:29:42,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:42,306 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 503 treesize of output 467 [2022-02-18 16:29:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:45,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423850359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:45,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:45,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:29:45,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315594143] [2022-02-18 16:29:45,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:45,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:29:45,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:29:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:29:45,728 INFO L87 Difference]: Start difference. First operand 754 states and 2774 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:29:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:51,067 INFO L93 Difference]: Finished difference Result 1423 states and 4586 transitions. [2022-02-18 16:29:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-18 16:29:51,068 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:29:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:51,070 INFO L225 Difference]: With dead ends: 1423 [2022-02-18 16:29:51,070 INFO L226 Difference]: Without dead ends: 1333 [2022-02-18 16:29:51,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=510, Invalid=1652, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:29:51,070 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 223 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:51,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 342 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1010 Invalid, 0 Unknown, 100 Unchecked, 0.7s Time] [2022-02-18 16:29:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-02-18 16:29:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 757. [2022-02-18 16:29:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.6904761904761907) internal successors, (2790), 756 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2790 transitions. [2022-02-18 16:29:51,085 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2790 transitions. Word has length 20 [2022-02-18 16:29:51,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:51,085 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2790 transitions. [2022-02-18 16:29:51,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:29:51,086 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2790 transitions. [2022-02-18 16:29:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:51,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:51,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:29:51,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:51,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-18 16:29:51,303 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:51,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash -852266822, now seen corresponding path program 35 times [2022-02-18 16:29:51,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:51,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273523177] [2022-02-18 16:29:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:51,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:51,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273523177] [2022-02-18 16:29:51,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273523177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:51,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207944282] [2022-02-18 16:29:51,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:29:51,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:51,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:51,620 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:29:51,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-18 16:29:51,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:29:51,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:51,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:29:51,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:52,023 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 213 treesize of output 187 [2022-02-18 16:29:52,679 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 351 treesize of output 293 [2022-02-18 16:29:52,682 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 246 [2022-02-18 16:29:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:53,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:55,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:55,139 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 332 treesize of output 300 [2022-02-18 16:29:56,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:56,137 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 278 treesize of output 256 [2022-02-18 16:29:56,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:56,150 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 252 treesize of output 242 [2022-02-18 16:29:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:56,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207944282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:56,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:56,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:29:56,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910000715] [2022-02-18 16:29:56,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:56,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:29:56,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:56,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:29:56,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:29:56,700 INFO L87 Difference]: Start difference. First operand 757 states and 2790 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:30:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:00,823 INFO L93 Difference]: Finished difference Result 1162 states and 3898 transitions. [2022-02-18 16:30:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 16:30:00,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:30:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:00,826 INFO L225 Difference]: With dead ends: 1162 [2022-02-18 16:30:00,826 INFO L226 Difference]: Without dead ends: 1117 [2022-02-18 16:30:00,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=372, Invalid=1980, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:30:00,826 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 185 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:00,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 441 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:30:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-02-18 16:30:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 759. [2022-02-18 16:30:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.6939313984168867) internal successors, (2800), 758 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2800 transitions. [2022-02-18 16:30:00,837 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2800 transitions. Word has length 20 [2022-02-18 16:30:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:00,837 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2800 transitions. [2022-02-18 16:30:00,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:30:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2800 transitions. [2022-02-18 16:30:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:00,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:00,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:30:00,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-18 16:30:01,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:01,040 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash 821692760, now seen corresponding path program 36 times [2022-02-18 16:30:01,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:01,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670727890] [2022-02-18 16:30:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:01,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:01,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670727890] [2022-02-18 16:30:01,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670727890] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:01,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354838222] [2022-02-18 16:30:01,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:30:01,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:01,304 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:30:01,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-18 16:30:01,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:30:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:30:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:01,891 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 214 treesize of output 190 [2022-02-18 16:30:03,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:03,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 263 [2022-02-18 16:30:03,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:03,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 231 [2022-02-18 16:30:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:04,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:06,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:06,715 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 514 treesize of output 486 [2022-02-18 16:30:11,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:11,296 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 430 treesize of output 400 [2022-02-18 16:30:11,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:11,307 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 396 treesize of output 370 [2022-02-18 16:30:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:13,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354838222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:13,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:13,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:30:13,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676863253] [2022-02-18 16:30:13,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:13,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:30:13,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:30:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:30:13,474 INFO L87 Difference]: Start difference. First operand 759 states and 2800 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:30:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:18,376 INFO L93 Difference]: Finished difference Result 1282 states and 4176 transitions. [2022-02-18 16:30:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-18 16:30:18,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:30:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:18,378 INFO L225 Difference]: With dead ends: 1282 [2022-02-18 16:30:18,378 INFO L226 Difference]: Without dead ends: 1192 [2022-02-18 16:30:18,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:30:18,379 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 176 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:18,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 374 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 927 Invalid, 0 Unknown, 162 Unchecked, 0.6s Time] [2022-02-18 16:30:18,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-02-18 16:30:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 768. [2022-02-18 16:30:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.701434159061278) internal successors, (2839), 767 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2839 transitions. [2022-02-18 16:30:18,391 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2839 transitions. Word has length 20 [2022-02-18 16:30:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:18,392 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2839 transitions. [2022-02-18 16:30:18,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:30:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2839 transitions. [2022-02-18 16:30:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:18,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:18,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:30:18,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:18,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-18 16:30:18,593 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash -522958392, now seen corresponding path program 37 times [2022-02-18 16:30:18,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:18,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304741376] [2022-02-18 16:30:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:18,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:18,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:18,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304741376] [2022-02-18 16:30:18,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304741376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:18,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536117159] [2022-02-18 16:30:18,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:30:18,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:18,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:18,900 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:30:18,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-18 16:30:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:30:18,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:19,244 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 185 treesize of output 163 [2022-02-18 16:30:19,915 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 338 treesize of output 290 [2022-02-18 16:30:19,919 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 294 treesize of output 254 [2022-02-18 16:30:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:20,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:22,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:22,223 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 381 treesize of output 357 [2022-02-18 16:30:27,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:27,448 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 506 treesize of output 466 [2022-02-18 16:30:27,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:27,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 475 treesize of output 449 [2022-02-18 16:30:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:29,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536117159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:29,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:29,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:30:29,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594225303] [2022-02-18 16:30:29,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:29,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:30:29,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:30:29,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:30:29,022 INFO L87 Difference]: Start difference. First operand 768 states and 2839 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:30:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:31,903 INFO L93 Difference]: Finished difference Result 1211 states and 4104 transitions. [2022-02-18 16:30:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 16:30:31,904 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:30:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:31,906 INFO L225 Difference]: With dead ends: 1211 [2022-02-18 16:30:31,906 INFO L226 Difference]: Without dead ends: 1174 [2022-02-18 16:30:31,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=374, Invalid=1788, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:30:31,907 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:31,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 377 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:30:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-02-18 16:30:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 763. [2022-02-18 16:30:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.70997375328084) internal successors, (2827), 762 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2827 transitions. [2022-02-18 16:30:31,922 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2827 transitions. Word has length 20 [2022-02-18 16:30:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:31,922 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2827 transitions. [2022-02-18 16:30:31,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:30:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2827 transitions. [2022-02-18 16:30:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:31,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:31,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:30:31,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:32,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:32,142 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:32,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1850231866, now seen corresponding path program 38 times [2022-02-18 16:30:32,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:32,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716739471] [2022-02-18 16:30:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:32,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:32,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716739471] [2022-02-18 16:30:32,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716739471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:32,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701932094] [2022-02-18 16:30:32,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:30:32,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:32,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:32,412 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:30:32,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-18 16:30:32,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:30:32,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:32,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:30:32,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:33,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:33,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 257 [2022-02-18 16:30:33,544 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 365 treesize of output 321 [2022-02-18 16:30:33,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:33,549 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 281 [2022-02-18 16:30:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:34,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:37,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:37,520 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 547 treesize of output 513 [2022-02-18 16:30:40,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:40,737 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 424 treesize of output 394 [2022-02-18 16:30:40,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:40,747 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 373 treesize of output 355 [2022-02-18 16:30:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:41,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701932094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:41,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:41,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:30:41,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673918205] [2022-02-18 16:30:41,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:41,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:30:41,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:30:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:30:41,717 INFO L87 Difference]: Start difference. First operand 763 states and 2827 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:30:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:42,200 INFO L93 Difference]: Finished difference Result 843 states and 3059 transitions. [2022-02-18 16:30:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 16:30:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:30:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:42,202 INFO L225 Difference]: With dead ends: 843 [2022-02-18 16:30:42,202 INFO L226 Difference]: Without dead ends: 828 [2022-02-18 16:30:42,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:30:42,202 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:42,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 151 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 16:30:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-02-18 16:30:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 765. [2022-02-18 16:30:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.7094240837696337) internal successors, (2834), 764 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2834 transitions. [2022-02-18 16:30:42,214 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2834 transitions. Word has length 20 [2022-02-18 16:30:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:42,214 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2834 transitions. [2022-02-18 16:30:42,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:30:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2834 transitions. [2022-02-18 16:30:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:42,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:42,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:30:42,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:42,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:42,416 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1304798714, now seen corresponding path program 39 times [2022-02-18 16:30:42,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:42,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972477093] [2022-02-18 16:30:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:42,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:42,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:42,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972477093] [2022-02-18 16:30:42,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972477093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:42,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595537526] [2022-02-18 16:30:42,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:30:42,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:42,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:42,767 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:30:42,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-18 16:30:42,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:30:42,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:30:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:43,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:43,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 290 [2022-02-18 16:30:44,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:44,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 203 [2022-02-18 16:30:44,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:44,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 183 [2022-02-18 16:30:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:47,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:49,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:49,633 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 538 treesize of output 484 [2022-02-18 16:30:51,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:51,523 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 452 treesize of output 422 [2022-02-18 16:30:51,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:51,533 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 401 treesize of output 359 [2022-02-18 16:30:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:52,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595537526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:52,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:52,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:30:52,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691061628] [2022-02-18 16:30:52,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:52,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:30:52,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:30:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:30:52,768 INFO L87 Difference]: Start difference. First operand 765 states and 2834 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:54,113 INFO L93 Difference]: Finished difference Result 1138 states and 3866 transitions. [2022-02-18 16:30:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-18 16:30:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:30:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:54,115 INFO L225 Difference]: With dead ends: 1138 [2022-02-18 16:30:54,115 INFO L226 Difference]: Without dead ends: 1123 [2022-02-18 16:30:54,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 16:30:54,115 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:54,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 201 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 655 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2022-02-18 16:30:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-02-18 16:30:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 766. [2022-02-18 16:30:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.7111111111111112) internal successors, (2839), 765 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2839 transitions. [2022-02-18 16:30:54,128 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2839 transitions. Word has length 20 [2022-02-18 16:30:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:54,128 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 2839 transitions. [2022-02-18 16:30:54,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2839 transitions. [2022-02-18 16:30:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:54,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:54,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:30:54,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:54,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-18 16:30:54,330 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1695825112, now seen corresponding path program 40 times [2022-02-18 16:30:54,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:54,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151625234] [2022-02-18 16:30:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:54,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:54,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151625234] [2022-02-18 16:30:54,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151625234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:54,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966297152] [2022-02-18 16:30:54,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:30:54,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:54,692 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:30:54,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-18 16:30:54,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:30:54,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:54,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:30:54,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:55,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:55,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 271 [2022-02-18 16:30:56,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:56,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 232 [2022-02-18 16:30:56,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:56,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 206 [2022-02-18 16:30:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:58,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:59,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:59,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 396 treesize of output 372 [2022-02-18 16:31:03,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:03,785 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 601 treesize of output 555 [2022-02-18 16:31:03,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:03,796 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 564 treesize of output 504 [2022-02-18 16:31:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:05,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966297152] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:05,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:05,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:31:05,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261368442] [2022-02-18 16:31:05,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:05,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:31:05,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:31:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:31:05,389 INFO L87 Difference]: Start difference. First operand 766 states and 2839 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:31:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:10,341 INFO L93 Difference]: Finished difference Result 1516 states and 4840 transitions. [2022-02-18 16:31:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-18 16:31:10,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:31:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:10,344 INFO L225 Difference]: With dead ends: 1516 [2022-02-18 16:31:10,344 INFO L226 Difference]: Without dead ends: 1381 [2022-02-18 16:31:10,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=581, Invalid=2611, Unknown=0, NotChecked=0, Total=3192 [2022-02-18 16:31:10,344 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 236 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:10,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 394 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 973 Invalid, 0 Unknown, 137 Unchecked, 0.6s Time] [2022-02-18 16:31:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-02-18 16:31:10,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 780. [2022-02-18 16:31:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.730423620025674) internal successors, (2906), 779 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2906 transitions. [2022-02-18 16:31:10,362 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2906 transitions. Word has length 20 [2022-02-18 16:31:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:10,362 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2906 transitions. [2022-02-18 16:31:10,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:31:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2906 transitions. [2022-02-18 16:31:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:10,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:10,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:31:10,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-18 16:31:10,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:10,586 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1840882544, now seen corresponding path program 41 times [2022-02-18 16:31:10,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:10,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974317164] [2022-02-18 16:31:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:10,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:10,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:10,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974317164] [2022-02-18 16:31:10,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974317164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:10,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921525232] [2022-02-18 16:31:10,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:31:10,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:10,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:10,932 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:31:10,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-18 16:31:11,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:31:11,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:31:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:31:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:11,369 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 222 treesize of output 188 [2022-02-18 16:31:11,984 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 248 treesize of output 212 [2022-02-18 16:31:11,987 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 216 treesize of output 192 [2022-02-18 16:31:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:12,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:15,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:15,098 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 561 treesize of output 513 [2022-02-18 16:31:16,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:16,902 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 445 treesize of output 417 [2022-02-18 16:31:16,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:16,912 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 413 treesize of output 383 [2022-02-18 16:31:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:18,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921525232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:18,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:18,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:31:18,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665967103] [2022-02-18 16:31:18,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:18,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:31:18,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:31:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:31:18,626 INFO L87 Difference]: Start difference. First operand 780 states and 2906 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:31:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:22,822 INFO L93 Difference]: Finished difference Result 1339 states and 4457 transitions. [2022-02-18 16:31:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-18 16:31:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:31:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:22,825 INFO L225 Difference]: With dead ends: 1339 [2022-02-18 16:31:22,825 INFO L226 Difference]: Without dead ends: 1264 [2022-02-18 16:31:22,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=498, Invalid=2472, Unknown=0, NotChecked=0, Total=2970 [2022-02-18 16:31:22,825 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 152 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:22,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 502 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:31:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-02-18 16:31:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 793. [2022-02-18 16:31:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.7373737373737375) internal successors, (2960), 792 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2960 transitions. [2022-02-18 16:31:22,838 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2960 transitions. Word has length 20 [2022-02-18 16:31:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:22,838 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2960 transitions. [2022-02-18 16:31:22,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:31:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2960 transitions. [2022-02-18 16:31:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:22,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:22,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:31:22,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-18 16:31:23,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-18 16:31:23,041 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1172274586, now seen corresponding path program 42 times [2022-02-18 16:31:23,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:23,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394308928] [2022-02-18 16:31:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:23,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:23,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:23,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394308928] [2022-02-18 16:31:23,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394308928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:23,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739285059] [2022-02-18 16:31:23,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:31:23,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:23,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:23,346 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:31:23,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-18 16:31:23,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:31:23,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:31:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:31:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:23,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:23,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 307 [2022-02-18 16:31:25,071 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 294 treesize of output 262 [2022-02-18 16:31:25,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:25,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 238 [2022-02-18 16:31:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:27,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:30,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:30,709 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 594 treesize of output 556 [2022-02-18 16:31:32,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:32,833 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 416 treesize of output 390 [2022-02-18 16:31:32,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:32,842 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 369 treesize of output 345 [2022-02-18 16:31:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:36,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739285059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:36,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:36,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:31:36,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201651256] [2022-02-18 16:31:36,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:36,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:31:36,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:36,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:31:36,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:31:36,404 INFO L87 Difference]: Start difference. First operand 793 states and 2960 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:37,788 INFO L93 Difference]: Finished difference Result 1063 states and 3739 transitions. [2022-02-18 16:31:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-18 16:31:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:31:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:37,790 INFO L225 Difference]: With dead ends: 1063 [2022-02-18 16:31:37,790 INFO L226 Difference]: Without dead ends: 1048 [2022-02-18 16:31:37,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 16:31:37,791 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:37,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 266 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 779 Invalid, 0 Unknown, 110 Unchecked, 0.5s Time] [2022-02-18 16:31:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-02-18 16:31:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 793. [2022-02-18 16:31:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.7373737373737375) internal successors, (2960), 792 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2960 transitions. [2022-02-18 16:31:37,803 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2960 transitions. Word has length 20 [2022-02-18 16:31:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:37,803 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2960 transitions. [2022-02-18 16:31:37,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2960 transitions. [2022-02-18 16:31:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:37,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:37,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:31:37,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-18 16:31:38,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:38,028 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:38,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1938518042, now seen corresponding path program 43 times [2022-02-18 16:31:38,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:38,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371392103] [2022-02-18 16:31:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:38,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:38,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:38,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371392103] [2022-02-18 16:31:38,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371392103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:38,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227793937] [2022-02-18 16:31:38,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:31:38,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:38,330 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:31:38,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-18 16:31:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:31:38,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:38,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:38,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-18 16:31:40,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:40,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 210 [2022-02-18 16:31:40,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:40,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 201 [2022-02-18 16:31:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:43,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:45,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:45,424 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 408 treesize of output 390 [2022-02-18 16:31:52,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:52,077 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 398 treesize of output 372 [2022-02-18 16:31:52,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:52,087 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 368 treesize of output 334 [2022-02-18 16:31:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:54,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227793937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:54,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:54,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:31:54,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900942852] [2022-02-18 16:31:54,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:54,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:31:54,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:31:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:31:54,198 INFO L87 Difference]: Start difference. First operand 793 states and 2960 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:57,728 INFO L93 Difference]: Finished difference Result 1332 states and 4455 transitions. [2022-02-18 16:31:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-18 16:31:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:31:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:57,731 INFO L225 Difference]: With dead ends: 1332 [2022-02-18 16:31:57,731 INFO L226 Difference]: Without dead ends: 1257 [2022-02-18 16:31:57,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=441, Invalid=1365, Unknown=0, NotChecked=0, Total=1806 [2022-02-18 16:31:57,731 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 203 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:57,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 230 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 662 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-02-18 16:31:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-18 16:31:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 797. [2022-02-18 16:31:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.7449748743718594) internal successors, (2981), 796 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2981 transitions. [2022-02-18 16:31:57,748 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2981 transitions. Word has length 20 [2022-02-18 16:31:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:57,748 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2981 transitions. [2022-02-18 16:31:57,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2981 transitions. [2022-02-18 16:31:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:57,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:57,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:31:57,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-18 16:31:57,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:57,963 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1160859844, now seen corresponding path program 44 times [2022-02-18 16:31:57,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:57,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412365091] [2022-02-18 16:31:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:57,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:58,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:58,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412365091] [2022-02-18 16:31:58,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412365091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:58,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722070619] [2022-02-18 16:31:58,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:31:58,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:58,241 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:31:58,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-18 16:31:58,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:31:58,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:31:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:31:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:58,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:58,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 203 [2022-02-18 16:31:59,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:59,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 241 [2022-02-18 16:31:59,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:59,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 215 [2022-02-18 16:32:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:01,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:32:04,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:04,758 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 510 treesize of output 482 [2022-02-18 16:32:15,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:15,132 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 474 treesize of output 434 [2022-02-18 16:32:15,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:15,143 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 430 treesize of output 400 [2022-02-18 16:32:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:16,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722070619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:32:16,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:32:16,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:32:16,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650984803] [2022-02-18 16:32:16,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:32:16,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:32:16,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:32:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:32:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:32:16,576 INFO L87 Difference]: Start difference. First operand 797 states and 2981 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:32:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:32:19,956 INFO L93 Difference]: Finished difference Result 1244 states and 4174 transitions. [2022-02-18 16:32:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-18 16:32:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:32:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:32:19,959 INFO L225 Difference]: With dead ends: 1244 [2022-02-18 16:32:19,959 INFO L226 Difference]: Without dead ends: 1169 [2022-02-18 16:32:19,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2022-02-18 16:32:19,959 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 141 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:32:19,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 329 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 808 Invalid, 0 Unknown, 135 Unchecked, 0.5s Time] [2022-02-18 16:32:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-02-18 16:32:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 803. [2022-02-18 16:32:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.743142144638404) internal successors, (3002), 802 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3002 transitions. [2022-02-18 16:32:19,972 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3002 transitions. Word has length 20 [2022-02-18 16:32:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:32:19,972 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 3002 transitions. [2022-02-18 16:32:19,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:32:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3002 transitions. [2022-02-18 16:32:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:32:19,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:32:19,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:32:19,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-18 16:32:20,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-18 16:32:20,174 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:32:20,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:32:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash 279619950, now seen corresponding path program 45 times [2022-02-18 16:32:20,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:32:20,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949441046] [2022-02-18 16:32:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:32:20,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:32:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:32:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:20,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:32:20,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949441046] [2022-02-18 16:32:20,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949441046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:32:20,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683807471] [2022-02-18 16:32:20,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:32:20,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:32:20,508 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:32:20,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-18 16:32:20,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:32:20,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:32:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:32:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:32:20,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:32:20,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 231 [2022-02-18 16:32:22,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:32:22,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-02-18 16:32:22,086 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 202 treesize of output 178 [2022-02-18 16:32:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:22,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:32:25,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:25,903 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 488 treesize of output 452 [2022-02-18 16:32:30,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:30,102 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 522 treesize of output 482 [2022-02-18 16:32:30,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:30,115 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 491 treesize of output 445 [2022-02-18 16:32:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:31,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683807471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:32:31,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:32:31,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:32:31,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148835722] [2022-02-18 16:32:31,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:32:31,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:32:31,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:32:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:32:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:32:31,344 INFO L87 Difference]: Start difference. First operand 803 states and 3002 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:32,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:32:32,063 INFO L93 Difference]: Finished difference Result 991 states and 3522 transitions. [2022-02-18 16:32:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-18 16:32:32,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:32:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:32:32,066 INFO L225 Difference]: With dead ends: 991 [2022-02-18 16:32:32,066 INFO L226 Difference]: Without dead ends: 946 [2022-02-18 16:32:32,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-02-18 16:32:32,066 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:32:32,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 206 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 576 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-02-18 16:32:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-02-18 16:32:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 807. [2022-02-18 16:32:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.739454094292804) internal successors, (3014), 806 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 3014 transitions. [2022-02-18 16:32:32,077 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 3014 transitions. Word has length 20 [2022-02-18 16:32:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:32:32,078 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 3014 transitions. [2022-02-18 16:32:32,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 3014 transitions. [2022-02-18 16:32:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:32:32,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:32:32,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:32:32,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-18 16:32:32,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:32,303 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:32:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:32:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1311278162, now seen corresponding path program 46 times [2022-02-18 16:32:32,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:32:32,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521041790] [2022-02-18 16:32:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:32:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:32:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:32:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:32,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:32:32,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521041790] [2022-02-18 16:32:32,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521041790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:32:32,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028764178] [2022-02-18 16:32:32,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:32:32,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:32,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:32:32,627 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:32:32,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-18 16:32:32,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:32:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:32:32,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:32:32,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:32:33,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:32:33,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 358 treesize of output 318 [2022-02-18 16:32:34,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:32:34,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 362 treesize of output 316 [2022-02-18 16:32:34,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:32:34,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 274 [2022-02-18 16:32:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:35,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:32:38,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:38,542 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 521 treesize of output 483 [2022-02-18 16:32:41,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:41,270 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 552 treesize of output 498 [2022-02-18 16:32:41,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:41,283 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 494 treesize of output 456 [2022-02-18 16:32:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:43,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028764178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:32:43,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:32:43,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:32:43,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542507544] [2022-02-18 16:32:43,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:32:43,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:32:43,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:32:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:32:43,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:32:43,371 INFO L87 Difference]: Start difference. First operand 807 states and 3014 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:32:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:32:46,583 INFO L93 Difference]: Finished difference Result 1354 states and 4508 transitions. [2022-02-18 16:32:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-18 16:32:46,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 20 [2022-02-18 16:32:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:32:46,586 INFO L225 Difference]: With dead ends: 1354 [2022-02-18 16:32:46,586 INFO L226 Difference]: Without dead ends: 1294 [2022-02-18 16:32:46,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=404, Invalid=1758, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:32:46,586 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 178 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:32:46,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 321 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 698 Invalid, 0 Unknown, 226 Unchecked, 0.5s Time] [2022-02-18 16:32:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-02-18 16:32:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 819. [2022-02-18 16:32:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.745721271393643) internal successors, (3064), 818 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 3064 transitions. [2022-02-18 16:32:46,599 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 3064 transitions. Word has length 20 [2022-02-18 16:32:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:32:46,599 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 3064 transitions. [2022-02-18 16:32:46,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-02-18 16:32:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 3064 transitions. [2022-02-18 16:32:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:32:46,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:32:46,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:32:46,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-18 16:32:46,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-02-18 16:32:46,801 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:32:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:32:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash 514922904, now seen corresponding path program 47 times [2022-02-18 16:32:46,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:32:46,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724821300] [2022-02-18 16:32:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:32:46,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:32:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:32:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:47,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:32:47,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724821300] [2022-02-18 16:32:47,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724821300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:32:47,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366328438] [2022-02-18 16:32:47,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:32:47,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:47,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:32:47,129 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:32:47,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-18 16:32:47,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:32:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:32:47,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-18 16:32:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:32:47,475 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 203 treesize of output 173 [2022-02-18 16:32:48,139 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 339 treesize of output 289 [2022-02-18 16:32:48,143 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 276 treesize of output 240 [2022-02-18 16:32:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:48,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:32:50,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:50,544 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 255 treesize of output 241 [2022-02-18 16:32:51,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:51,303 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 354 treesize of output 322 [2022-02-18 16:32:51,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:51,312 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 331 treesize of output 299 [2022-02-18 16:32:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:51,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366328438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:32:51,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:32:51,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:32:51,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241955058] [2022-02-18 16:32:51,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:32:51,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:32:51,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:32:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:32:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:32:51,930 INFO L87 Difference]: Start difference. First operand 819 states and 3064 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:32:53,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:32:53,529 INFO L93 Difference]: Finished difference Result 1064 states and 3755 transitions. [2022-02-18 16:32:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-18 16:32:53,530 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:32:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:32:53,532 INFO L225 Difference]: With dead ends: 1064 [2022-02-18 16:32:53,532 INFO L226 Difference]: Without dead ends: 1049 [2022-02-18 16:32:53,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 16:32:53,532 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:32:53,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 259 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:32:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-02-18 16:32:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 819. [2022-02-18 16:32:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.745721271393643) internal successors, (3064), 818 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 3064 transitions. [2022-02-18 16:32:53,543 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 3064 transitions. Word has length 20 [2022-02-18 16:32:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:32:53,543 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 3064 transitions. [2022-02-18 16:32:53,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:32:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 3064 transitions. [2022-02-18 16:32:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:32:53,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:32:53,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:32:53,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-18 16:32:53,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:53,745 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:32:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:32:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash 244020624, now seen corresponding path program 48 times [2022-02-18 16:32:53,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:32:53,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191561240] [2022-02-18 16:32:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:32:53,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:32:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:32:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:54,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:32:54,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191561240] [2022-02-18 16:32:54,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191561240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:32:54,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559563345] [2022-02-18 16:32:54,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:32:54,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:54,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:32:54,017 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:32:54,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-18 16:32:54,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:32:54,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:32:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:32:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:32:54,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:32:54,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 192 [2022-02-18 16:32:55,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:32:55,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 278 [2022-02-18 16:32:55,280 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 282 treesize of output 246 [2022-02-18 16:32:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:56,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:32:59,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:59,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 486 treesize of output 450 [2022-02-18 16:33:01,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:01,130 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 476 treesize of output 426 [2022-02-18 16:33:01,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:01,142 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 422 treesize of output 384 [2022-02-18 16:33:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:04,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559563345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:33:04,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:33:04,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:33:04,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783637134] [2022-02-18 16:33:04,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:33:04,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:33:04,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:33:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:33:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:33:04,232 INFO L87 Difference]: Start difference. First operand 819 states and 3064 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:33:07,613 INFO L93 Difference]: Finished difference Result 1393 states and 4624 transitions. [2022-02-18 16:33:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 16:33:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:33:07,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:33:07,616 INFO L225 Difference]: With dead ends: 1393 [2022-02-18 16:33:07,616 INFO L226 Difference]: Without dead ends: 1303 [2022-02-18 16:33:07,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=455, Invalid=1437, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 16:33:07,616 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 191 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:33:07,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 226 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 686 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-02-18 16:33:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-02-18 16:33:07,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 825. [2022-02-18 16:33:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.753640776699029) internal successors, (3093), 824 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 3093 transitions. [2022-02-18 16:33:07,629 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 3093 transitions. Word has length 20 [2022-02-18 16:33:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:33:07,630 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 3093 transitions. [2022-02-18 16:33:07,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:07,630 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 3093 transitions. [2022-02-18 16:33:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:33:07,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:33:07,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:33:07,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-18 16:33:07,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-02-18 16:33:07,833 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:33:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:33:07,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1393306662, now seen corresponding path program 49 times [2022-02-18 16:33:07,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:33:07,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585254497] [2022-02-18 16:33:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:33:07,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:33:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:33:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:08,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:33:08,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585254497] [2022-02-18 16:33:08,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585254497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:33:08,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225917905] [2022-02-18 16:33:08,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:33:08,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:08,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:33:08,214 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:33:08,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-18 16:33:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:33:08,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-18 16:33:08,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:33:08,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:33:08,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 261 [2022-02-18 16:33:13,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:33:13,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 370 treesize of output 316 [2022-02-18 16:33:13,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:33:13,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 284 [2022-02-18 16:33:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:15,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:33:18,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:18,037 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 475 treesize of output 445 [2022-02-18 16:33:24,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:24,599 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 532 treesize of output 492 [2022-02-18 16:33:24,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:24,610 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 488 treesize of output 440 [2022-02-18 16:33:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:27,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225917905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:33:27,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:33:27,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:33:27,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60278813] [2022-02-18 16:33:27,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:33:27,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:33:27,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:33:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:33:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:33:27,532 INFO L87 Difference]: Start difference. First operand 825 states and 3093 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:33:33,639 INFO L93 Difference]: Finished difference Result 1293 states and 4352 transitions. [2022-02-18 16:33:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-18 16:33:33,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 16:33:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:33:33,641 INFO L225 Difference]: With dead ends: 1293 [2022-02-18 16:33:33,641 INFO L226 Difference]: Without dead ends: 1233 [2022-02-18 16:33:33,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=428, Invalid=2224, Unknown=0, NotChecked=0, Total=2652 [2022-02-18 16:33:33,642 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 112 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:33:33,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 516 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1011 Invalid, 0 Unknown, 302 Unchecked, 0.6s Time] [2022-02-18 16:33:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-02-18 16:33:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 827. [2022-02-18 16:33:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.7530266343825667) internal successors, (3100), 826 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 3100 transitions. [2022-02-18 16:33:33,653 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 3100 transitions. Word has length 20 [2022-02-18 16:33:33,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:33:33,654 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 3100 transitions. [2022-02-18 16:33:33,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 3100 transitions. [2022-02-18 16:33:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:33:33,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:33:33,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:33:33,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-18 16:33:33,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:33,856 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:33:33,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:33:33,856 INFO L85 PathProgramCache]: Analyzing trace with hash 465442812, now seen corresponding path program 50 times [2022-02-18 16:33:33,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:33:33,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265353920] [2022-02-18 16:33:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:33:33,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:33:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:33:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:34,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:33:34,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265353920] [2022-02-18 16:33:34,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265353920] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:33:34,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146076975] [2022-02-18 16:33:34,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:33:34,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:34,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:33:34,118 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:33:34,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-18 16:33:34,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:33:34,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:33:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-18 16:33:34,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:33:34,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:33:34,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 176 [2022-02-18 16:33:36,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:33:36,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 289 [2022-02-18 16:33:36,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:33:36,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 255 Received shutdown request... [2022-02-18 16:33:36,565 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-18 16:33:36,572 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-18 16:33:36,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-18 16:33:36,601 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 [2022-02-18 16:33:36,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:36,772 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-8-6-3-3-3-2-3-1 context. [2022-02-18 16:33:36,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-18 16:33:36,775 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-18 16:33:36,775 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-18 16:33:36,778 INFO L732 BasicCegarLoop]: Path program histogram: [50, 6, 6, 4, 3, 2, 2, 1, 1, 1] [2022-02-18 16:33:36,780 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-18 16:33:36,780 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-18 16:33:36,781 INFO L202 PluginConnector]: Adding new model nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 04:33:36 BasicIcfg [2022-02-18 16:33:36,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-18 16:33:36,782 INFO L158 Benchmark]: Toolchain (without parser) took 705099.21ms. Allocated memory was 175.1MB in the beginning and 594.5MB in the end (delta: 419.4MB). Free memory was 133.0MB in the beginning and 444.9MB in the end (delta: -311.9MB). Peak memory consumption was 367.2MB. Max. memory is 8.0GB. [2022-02-18 16:33:36,782 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 175.1MB. Free memory is still 134.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-18 16:33:36,782 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.05ms. Allocated memory is still 175.1MB. Free memory was 132.9MB in the beginning and 131.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 16:33:36,782 INFO L158 Benchmark]: Boogie Preprocessor took 17.14ms. Allocated memory is still 175.1MB. Free memory was 131.3MB in the beginning and 130.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 16:33:36,782 INFO L158 Benchmark]: RCFGBuilder took 403.85ms. Allocated memory is still 175.1MB. Free memory was 130.2MB in the beginning and 144.6MB in the end (delta: -14.4MB). Peak memory consumption was 20.4MB. Max. memory is 8.0GB. [2022-02-18 16:33:36,782 INFO L158 Benchmark]: TraceAbstraction took 704650.09ms. Allocated memory was 175.1MB in the beginning and 594.5MB in the end (delta: 419.4MB). Free memory was 144.3MB in the beginning and 444.9MB in the end (delta: -300.7MB). Peak memory consumption was 379.3MB. Max. memory is 8.0GB. [2022-02-18 16:33:36,782 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 175.1MB. Free memory is still 134.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.05ms. Allocated memory is still 175.1MB. Free memory was 132.9MB in the beginning and 131.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.14ms. Allocated memory is still 175.1MB. Free memory was 131.3MB in the beginning and 130.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 403.85ms. Allocated memory is still 175.1MB. Free memory was 130.2MB in the beginning and 144.6MB in the end (delta: -14.4MB). Peak memory consumption was 20.4MB. Max. memory is 8.0GB. * TraceAbstraction took 704650.09ms. Allocated memory was 175.1MB in the beginning and 594.5MB in the end (delta: 419.4MB). Free memory was 144.3MB in the beginning and 444.9MB in the end (delta: -300.7MB). Peak memory consumption was 379.3MB. 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: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-8-6-3-3-3-2-3-1 context. - TimeoutResultAtElement [Line: 133]: 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 21 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-8-6-3-3-3-2-3-1 context. - TimeoutResultAtElement [Line: 136]: 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 21 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-8-6-3-3-3-2-3-1 context. - TimeoutResultAtElement [Line: 137]: 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 21 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-8-6-3-3-3-2-3-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 704.5s, OverallIterations: 76, TraceHistogramMax: 1, PathProgramHistogramMax: 50, EmptinessCheckTime: 0.1s, AutomataDifference: 206.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11240 SdHoareTripleChecker+Valid, 34.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11240 mSDsluCounter, 18290 SdHoareTripleChecker+Invalid, 29.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3105 IncrementalHoareTripleChecker+Unchecked, 34712 mSDsCounter, 4402 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 55341 IncrementalHoareTripleChecker+Invalid, 62848 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4402 mSolverCounterUnsat, 1752 mSDtfsCounter, 55341 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3826 GetRequests, 1313 SyntacticMatches, 104 SemanticMatches, 2409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34631 ImplicationChecksByTransitivity, 214.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=827occurred in iteration=75, InterpolantAutomatonStates: 1719, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 75 MinimizatonAttempts, 28446 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 479.0s InterpolantComputationTime, 2435 NumberOfCodeBlocks, 2435 NumberOfCodeBlocksAsserted, 187 NumberOfCheckSat, 3298 ConstructedInterpolants, 58 QuantifiedInterpolants, 143208 SizeOfPredicates, 1166 NumberOfNonLiveVariables, 4340 ConjunctsInSsa, 1892 ConjunctsInUnsatCore, 181 InterpolantComputations, 22 PerfectInterpolantSequences, 18/471 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